diff --git a/Cargo.toml b/Cargo.toml
index 5ae27278f..f2a64e4b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,120 @@ version = "0.1.0"
 [workspace]
 members = ["tools/check-cpp-code-format", "tools/progress-tracker", "xtask"]
 
+[workspace.lints.rust]
+absolute_paths_not_starting_with_crate = "warn"
+explicit_outlives_requirements = "warn"
+let_underscore_drop = "warn"
+macro_use_extern_crate = "warn"
+meta_variable_misuse = "warn"
+missing_abi = "warn"
+missing_docs = "allow"
+noop_method_call = "warn"
+pointer_structural_match = "warn"
+single_use_lifetimes = "warn"
+trivial_casts = "allow"
+trivial_numeric_casts = "warn"
+unsafe_code = "warn"
+unsafe_op_in_unsafe_fn = "warn"
+unused_crate_dependencies = "warn"
+unused_extern_crates = "warn"
+unused_import_braces = "warn"
+unused_lifetimes = "warn"
+unused_macro_rules = "warn"
+unused_qualifications = "warn"
+unused_tuple_struct_fields = "warn"
+variant_size_differences = "warn"
+
+[workspace.lints.clippy]
+alloc_instead_of_core = "warn"
+allow_attributes_without_reason = "warn"
+as_ptr_cast_mut = "warn"
+branches_sharing_code = "warn"
+cargo_common_metadata = "allow"
+cast_possible_truncation = "allow"
+cast_possible_wrap = "allow"
+cast_sign_loss = "allow"
+clone_on_ref_ptr = "warn"
+cognitive_complexity = "warn"
+create_dir = "warn"
+dbg_macro = "warn"
+debug_assert_with_mut_call = "warn"
+decimal_literal_representation = "allow"
+deref_by_slicing = "warn"
+derive_partial_eq_without_eq = "warn"
+empty_drop = "warn"
+empty_line_after_outer_attr = "warn"
+empty_structs_with_brackets = "warn"
+equatable_if_let = "warn"
+fallible_impl_from = "warn"
+filetype_is_file = "warn"
+float_cmp_const = "warn"
+format_push_string = "warn"
+get_unwrap = "warn"
+if_then_some_else_none = "warn"
+imprecise_flops = "warn"
+iter_on_empty_collections = "warn"
+iter_on_single_items = "warn"
+iter_with_drain = "warn"
+large_include_file = "warn"
+let_underscore_must_use = "warn"
+lossy_float_literal = "warn"
+manual_clamp = "warn"
+map_err_ignore = "warn"
+missing_panics_doc = "allow"
+mixed_read_write_in_expression = "warn"
+multiple_inherent_impl = "warn"
+must_use_candidate = "allow"
+mutex_atomic = "warn"
+mutex_integer = "warn"
+needless_collect = "warn"
+needless_pass_by_value = "allow"
+negative_feature_names = "warn"
+non_send_fields_in_send_ty = "warn"
+nonstandard_macro_braces = "warn"
+option_if_let_else = "warn"
+or_fun_call = "warn"
+panic = "warn"
+panic_in_result_fn = "warn"
+partial_pub_fields = "warn"
+path_buf_push_overwrite = "warn"
+pedantic = "warn"
+print_stderr = "warn"
+print_stdout = "warn"
+rc_buffer = "warn"
+rc_mutex = "warn"
+redundant_feature_names = "warn"
+redundant_locals = "allow"               # False positive.
+redundant_pub_crate = "warn"
+rest_pat_in_fully_bound_structs = "warn"
+same_name_method = "allow"
+self_named_module_files = "warn"
+significant_drop_in_scrutinee = "warn"
+string_lit_as_bytes = "warn"
+string_to_string = "warn"
+suboptimal_flops = "warn"
+suspicious_operation_groupings = "warn"
+todo = "warn"
+trailing_empty_array = "warn"
+trait_duplication_in_bounds = "warn"
+transmute_undefined_repr = "warn"
+trivial_regex = "warn"
+try_err = "warn"
+type_repetition_in_bounds = "warn"
+undocumented_unsafe_blocks = "warn"
+unimplemented = "warn"
+unnecessary_safety_comment = "warn"
+unnecessary_safety_doc = "warn"
+unnecessary_self_imports = "warn"
+unneeded_field_pattern = "warn"
+unused_peekable = "warn"
+unused_rounding = "warn"
+use_debug = "warn"
+use_self = "warn"
+useless_let_if_seq = "warn"
+verbose_file_reads = "warn"
+wildcard_dependencies = "allow"
+
 [dependencies]
 rand = "0.6"
 
diff --git a/src/lib.rs b/src/lib.rs
index 805146df1..e5c06ea7c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,124 +1,3 @@
-#![warn(
-    absolute_paths_not_starting_with_crate,
-    explicit_outlives_requirements,
-    let_underscore_drop,
-    macro_use_extern_crate,
-    meta_variable_misuse,
-    missing_abi,
-    missing_docs,
-    noop_method_call,
-    pointer_structural_match,
-    single_use_lifetimes,
-    trivial_casts,
-    trivial_numeric_casts,
-    unsafe_code,
-    unsafe_op_in_unsafe_fn,
-    unused_crate_dependencies,
-    unused_extern_crates,
-    unused_import_braces,
-    unused_lifetimes,
-    unused_macro_rules,
-    unused_qualifications,
-    unused_tuple_struct_fields,
-    variant_size_differences,
-    clippy::alloc_instead_of_core,
-    clippy::allow_attributes_without_reason,
-    clippy::as_ptr_cast_mut,
-    clippy::branches_sharing_code,
-    clippy::cargo_common_metadata,
-    clippy::clone_on_ref_ptr,
-    clippy::cognitive_complexity,
-    clippy::create_dir,
-    clippy::dbg_macro,
-    clippy::debug_assert_with_mut_call,
-    clippy::decimal_literal_representation,
-    clippy::deref_by_slicing,
-    clippy::derive_partial_eq_without_eq,
-    clippy::empty_drop,
-    clippy::empty_line_after_outer_attr,
-    clippy::empty_structs_with_brackets,
-    clippy::equatable_if_let,
-    clippy::fallible_impl_from,
-    clippy::filetype_is_file,
-    clippy::float_cmp_const,
-    clippy::format_push_string,
-    clippy::get_unwrap,
-    clippy::if_then_some_else_none,
-    clippy::imprecise_flops,
-    clippy::iter_on_empty_collections,
-    clippy::iter_on_single_items,
-    clippy::iter_with_drain,
-    clippy::large_include_file,
-    clippy::let_underscore_must_use,
-    clippy::lossy_float_literal,
-    clippy::manual_clamp,
-    clippy::map_err_ignore,
-    clippy::mixed_read_write_in_expression,
-    clippy::multiple_inherent_impl,
-    clippy::mutex_atomic,
-    clippy::mutex_integer,
-    clippy::needless_collect,
-    clippy::negative_feature_names,
-    clippy::non_send_fields_in_send_ty,
-    clippy::nonstandard_macro_braces,
-    clippy::option_if_let_else,
-    clippy::or_fun_call,
-    clippy::panic,
-    clippy::panic_in_result_fn,
-    clippy::partial_pub_fields,
-    clippy::path_buf_push_overwrite,
-    clippy::pedantic,
-    clippy::print_stderr,
-    clippy::print_stdout,
-    clippy::rc_buffer,
-    clippy::rc_mutex,
-    clippy::redundant_feature_names,
-    clippy::redundant_pub_crate,
-    clippy::rest_pat_in_fully_bound_structs,
-    clippy::same_name_method,
-    clippy::self_named_module_files,
-    clippy::significant_drop_in_scrutinee,
-    clippy::string_lit_as_bytes,
-    clippy::string_to_string,
-    clippy::suboptimal_flops,
-    clippy::suspicious_operation_groupings,
-    clippy::todo,
-    clippy::trailing_empty_array,
-    clippy::trait_duplication_in_bounds,
-    clippy::transmute_undefined_repr,
-    clippy::trivial_regex,
-    clippy::try_err,
-    clippy::type_repetition_in_bounds,
-    clippy::undocumented_unsafe_blocks,
-    clippy::unimplemented,
-    clippy::unnecessary_safety_comment,
-    clippy::unnecessary_safety_doc,
-    clippy::unnecessary_self_imports,
-    clippy::unneeded_field_pattern,
-    clippy::unused_peekable,
-    clippy::unused_rounding,
-    clippy::use_debug,
-    clippy::use_self,
-    clippy::useless_let_if_seq,
-    clippy::verbose_file_reads,
-    clippy::wildcard_dependencies
-)]
-#![allow(
-    missing_docs,
-    trivial_casts,
-    clippy::cargo_common_metadata,
-    clippy::cast_possible_truncation,
-    clippy::cast_possible_wrap,
-    clippy::cast_sign_loss,
-    clippy::decimal_literal_representation,
-    clippy::missing_panics_doc,
-    clippy::must_use_candidate,
-    clippy::needless_pass_by_value,
-    clippy::redundant_locals, // False positive.
-    clippy::same_name_method,
-    clippy::wildcard_dependencies
-)]
-
 pub(crate) mod data_structures;
 pub mod problem_0001_two_sum;
 pub mod problem_0002_add_two_numbers;
diff --git a/src/problem_0374_guess_number_higher_or_lower/binary_search.rs b/src/problem_0374_guess_number_higher_or_lower/binary_search.rs
index c39903a8f..1f6cb7c10 100644
--- a/src/problem_0374_guess_number_higher_or_lower/binary_search.rs
+++ b/src/problem_0374_guess_number_higher_or_lower/binary_search.rs
@@ -1,4 +1,4 @@
-#![allow(non_snake_case)]
+#![allow(non_snake_case)] // Expected.
 
 use super::guess;
 
diff --git a/src/problem_0405_convert_a_number_to_hexadecimal/mod.rs b/src/problem_0405_convert_a_number_to_hexadecimal/mod.rs
index 66b6e6f1f..9b62a5809 100644
--- a/src/problem_0405_convert_a_number_to_hexadecimal/mod.rs
+++ b/src/problem_0405_convert_a_number_to_hexadecimal/mod.rs
@@ -1,4 +1,4 @@
-#![allow(clippy::wrong_self_convention)]
+#![allow(clippy::wrong_self_convention)] // Expected.
 
 pub mod cheating;
 pub mod iterative;
diff --git a/src/problem_0778_swim_in_rising_water/bidirectional_bfs.rs b/src/problem_0778_swim_in_rising_water/bidirectional_bfs.rs
index ec9d393dc..f53df3be9 100644
--- a/src/problem_0778_swim_in_rising_water/bidirectional_bfs.rs
+++ b/src/problem_0778_swim_in_rising_water/bidirectional_bfs.rs
@@ -37,7 +37,6 @@ impl Solution {
     }
 
     pub fn swim_in_water(grid: Vec<Vec<i32>>) -> i32 {
-        let grid = grid;
         let n = grid.len();
 
         if n < 2 {
diff --git a/src/problem_0992_subarrays_with_k_different_integers/sliding_window.rs b/src/problem_0992_subarrays_with_k_different_integers/sliding_window.rs
index d13c7253e..4060b2e17 100644
--- a/src/problem_0992_subarrays_with_k_different_integers/sliding_window.rs
+++ b/src/problem_0992_subarrays_with_k_different_integers/sliding_window.rs
@@ -108,7 +108,7 @@ mod tests {
     }
 
     #[test]
-    #[should_panic]
+    #[should_panic(expected = "internal error: entered unreachable code")]
     fn test_unwrap_occupied_failure() {
         super::Solution::unwrap_occupied(HashMap::from([(2, (3_u16, 5_u16))]).entry(5));
     }
diff --git a/src/problem_1001_grid_illumination/iterative.rs b/src/problem_1001_grid_illumination/iterative.rs
index 7e3affcfa..8dac196e4 100644
--- a/src/problem_1001_grid_illumination/iterative.rs
+++ b/src/problem_1001_grid_illumination/iterative.rs
@@ -117,7 +117,7 @@ mod tests {
     }
 
     #[test]
-    #[should_panic]
+    #[should_panic(expected = "internal error: entered unreachable code")]
     fn test_unwrap_occupied_failure() {
         super::Counter::unwrap_occupied(HashMap::from([(2_u32, 5_u16)]).entry(5));
     }
diff --git a/src/problem_1036_escape_a_large_maze/bfs.rs b/src/problem_1036_escape_a_large_maze/bfs.rs
index d58940032..b0e965a48 100644
--- a/src/problem_1036_escape_a_large_maze/bfs.rs
+++ b/src/problem_1036_escape_a_large_maze/bfs.rs
@@ -15,18 +15,14 @@ impl Solution {
     pub fn is_escape_possible(blocked: Vec<Vec<i32>>, source: Vec<i32>, target: Vec<i32>) -> bool {
         const MAZE_SIZE: u32 = 1_000_000;
 
-        let blocked = {
-            let blocked = blocked;
-
-            blocked
-                .iter()
-                .map(|point| {
-                    let [x, y]: [_; 2] = point.as_slice().try_into().unwrap();
-
-                    (x as u32, y as u32)
-                })
-                .collect::<HashSet<_>>()
-        };
+        let blocked = blocked
+            .into_iter()
+            .map(|point| {
+                let [x, y]: [_; 2] = point.try_into().ok().unwrap();
+
+                (x as u32, y as u32)
+            })
+            .collect::<HashSet<_>>();
 
         let source = Self::unwrap_point(source);
         let target = Self::unwrap_point(target);
diff --git a/src/problem_1105_filling_bookcase_shelves/dynamic_programming.rs b/src/problem_1105_filling_bookcase_shelves/dynamic_programming.rs
index 296322a3d..7c791e272 100644
--- a/src/problem_1105_filling_bookcase_shelves/dynamic_programming.rs
+++ b/src/problem_1105_filling_bookcase_shelves/dynamic_programming.rs
@@ -6,18 +6,14 @@ use std::convert::TryInto;
 
 impl Solution {
     pub fn min_height_shelves(books: Vec<Vec<i32>>, shelf_width: i32) -> i32 {
-        let books = {
-            let books = books;
-
-            books
-                .iter()
-                .map(|book| {
-                    let [thickness, height]: [_; 2] = book.as_slice().try_into().unwrap();
-
-                    (thickness as u32, height as u32)
-                })
-                .collect::<Vec<_>>()
-        };
+        let books = books
+            .into_iter()
+            .map(|book| {
+                let [thickness, height]: [_; 2] = book.try_into().ok().unwrap();
+
+                (thickness as u32, height as u32)
+            })
+            .collect::<Vec<_>>();
 
         let shelf_width = shelf_width as u32;
         let mut cache = Vec::with_capacity(books.len());
diff --git a/src/problem_1599_maximum_profit_of_operating_a_centennial_wheel/iterative.rs b/src/problem_1599_maximum_profit_of_operating_a_centennial_wheel/iterative.rs
index 1b89605ee..992d16e34 100644
--- a/src/problem_1599_maximum_profit_of_operating_a_centennial_wheel/iterative.rs
+++ b/src/problem_1599_maximum_profit_of_operating_a_centennial_wheel/iterative.rs
@@ -11,8 +11,6 @@ impl Solution {
         let mut waiting = 0;
 
         for (i, customer) in (1..).zip(customers) {
-            let customer = customer;
-
             waiting += customer;
 
             let onboard = waiting.min(4);
diff --git a/tools/check-cpp-code-format/src/main.rs b/tools/check-cpp-code-format/src/main.rs
index 073ce4362..a02ebf850 100644
--- a/tools/check-cpp-code-format/src/main.rs
+++ b/tools/check-cpp-code-format/src/main.rs
@@ -1,66 +1,3 @@
-#![warn(
-    explicit_outlives_requirements,
-    macro_use_extern_crate,
-    meta_variable_misuse,
-    missing_abi,
-    // missing_docs,
-    noop_method_call,
-    pointer_structural_match,
-    single_use_lifetimes,
-    trivial_casts,
-    trivial_numeric_casts,
-    unsafe_code,
-    unsafe_op_in_unsafe_fn,
-    unused_crate_dependencies,
-    unused_extern_crates,
-    unused_import_braces,
-    unused_lifetimes,
-    unused_qualifications,
-    variant_size_differences,
-    // clippy::cargo_common_metadata,
-    clippy::clone_on_ref_ptr,
-    clippy::cognitive_complexity,
-    clippy::create_dir,
-    clippy::dbg_macro,
-    clippy::debug_assert_with_mut_call,
-    clippy::empty_line_after_outer_attr,
-    clippy::fallible_impl_from,
-    clippy::filetype_is_file,
-    clippy::float_cmp_const,
-    clippy::get_unwrap,
-    clippy::if_then_some_else_none,
-    clippy::imprecise_flops,
-    clippy::let_underscore_must_use,
-    clippy::lossy_float_literal,
-    clippy::multiple_inherent_impl,
-    clippy::mutex_integer,
-    clippy::nonstandard_macro_braces,
-    clippy::panic_in_result_fn,
-    clippy::path_buf_push_overwrite,
-    clippy::pedantic,
-    clippy::print_stderr,
-    clippy::print_stdout,
-    clippy::rc_buffer,
-    clippy::rc_mutex,
-    clippy::rest_pat_in_fully_bound_structs,
-    clippy::string_lit_as_bytes,
-    clippy::string_to_string,
-    clippy::suboptimal_flops,
-    clippy::suspicious_operation_groupings,
-    clippy::todo,
-    clippy::trivial_regex,
-    clippy::unimplemented,
-    clippy::unnecessary_self_imports,
-    clippy::unneeded_field_pattern,
-    clippy::use_debug,
-    clippy::use_self,
-    clippy::useless_let_if_seq,
-    clippy::useless_transmute,
-    clippy::verbose_file_reads,
-    // clippy::wildcard_dependencies,
-)]
-#![allow(clippy::non_ascii_literal)]
-
 use regex::Regex;
 use std::path::PathBuf;
 use std::{env, fs};
diff --git a/tools/progress-tracker/src/main.rs b/tools/progress-tracker/src/main.rs
index adab681ba..5e1c54d9c 100644
--- a/tools/progress-tracker/src/main.rs
+++ b/tools/progress-tracker/src/main.rs
@@ -1,66 +1,3 @@
-#![warn(
-    explicit_outlives_requirements,
-    macro_use_extern_crate,
-    meta_variable_misuse,
-    missing_abi,
-    // missing_docs,
-    noop_method_call,
-    pointer_structural_match,
-    single_use_lifetimes,
-    trivial_casts,
-    trivial_numeric_casts,
-    unsafe_code,
-    unsafe_op_in_unsafe_fn,
-    unused_crate_dependencies,
-    unused_extern_crates,
-    unused_import_braces,
-    unused_lifetimes,
-    unused_qualifications,
-    variant_size_differences,
-    // clippy::cargo_common_metadata,
-    clippy::clone_on_ref_ptr,
-    clippy::cognitive_complexity,
-    clippy::create_dir,
-    clippy::dbg_macro,
-    clippy::debug_assert_with_mut_call,
-    clippy::empty_line_after_outer_attr,
-    clippy::fallible_impl_from,
-    clippy::filetype_is_file,
-    clippy::float_cmp_const,
-    clippy::get_unwrap,
-    clippy::if_then_some_else_none,
-    clippy::imprecise_flops,
-    clippy::let_underscore_must_use,
-    clippy::lossy_float_literal,
-    clippy::multiple_inherent_impl,
-    clippy::mutex_integer,
-    clippy::nonstandard_macro_braces,
-    clippy::panic_in_result_fn,
-    clippy::path_buf_push_overwrite,
-    clippy::pedantic,
-    clippy::print_stderr,
-    clippy::print_stdout,
-    clippy::rc_buffer,
-    clippy::rc_mutex,
-    clippy::rest_pat_in_fully_bound_structs,
-    clippy::string_lit_as_bytes,
-    clippy::string_to_string,
-    clippy::suboptimal_flops,
-    clippy::suspicious_operation_groupings,
-    clippy::todo,
-    clippy::trivial_regex,
-    clippy::unimplemented,
-    clippy::unnecessary_self_imports,
-    clippy::unneeded_field_pattern,
-    clippy::use_debug,
-    clippy::use_self,
-    clippy::useless_let_if_seq,
-    clippy::useless_transmute,
-    clippy::verbose_file_reads,
-    // clippy::wildcard_dependencies,
-)]
-#![allow(clippy::non_ascii_literal)]
-
 use git2::Repository;
 use problems::Problems;
 use reqwest::blocking;
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index 39ed76a94..2b631c65b 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -1,66 +1,3 @@
-#![warn(
-    explicit_outlives_requirements,
-    macro_use_extern_crate,
-    meta_variable_misuse,
-    missing_abi,
-    // missing_docs,
-    noop_method_call,
-    pointer_structural_match,
-    single_use_lifetimes,
-    trivial_casts,
-    trivial_numeric_casts,
-    unsafe_code,
-    unsafe_op_in_unsafe_fn,
-    unused_crate_dependencies,
-    unused_extern_crates,
-    unused_import_braces,
-    unused_lifetimes,
-    unused_qualifications,
-    variant_size_differences,
-    // clippy::cargo_common_metadata,
-    clippy::clone_on_ref_ptr,
-    clippy::cognitive_complexity,
-    clippy::create_dir,
-    clippy::dbg_macro,
-    clippy::debug_assert_with_mut_call,
-    clippy::empty_line_after_outer_attr,
-    clippy::fallible_impl_from,
-    clippy::filetype_is_file,
-    clippy::float_cmp_const,
-    clippy::get_unwrap,
-    clippy::if_then_some_else_none,
-    clippy::imprecise_flops,
-    clippy::let_underscore_must_use,
-    clippy::lossy_float_literal,
-    clippy::multiple_inherent_impl,
-    clippy::mutex_integer,
-    clippy::nonstandard_macro_braces,
-    clippy::panic_in_result_fn,
-    clippy::path_buf_push_overwrite,
-    clippy::pedantic,
-    clippy::print_stderr,
-    clippy::print_stdout,
-    clippy::rc_buffer,
-    clippy::rc_mutex,
-    clippy::rest_pat_in_fully_bound_structs,
-    clippy::string_lit_as_bytes,
-    clippy::string_to_string,
-    clippy::suboptimal_flops,
-    clippy::suspicious_operation_groupings,
-    clippy::todo,
-    clippy::trivial_regex,
-    clippy::unimplemented,
-    clippy::unnecessary_self_imports,
-    clippy::unneeded_field_pattern,
-    clippy::use_debug,
-    clippy::use_self,
-    clippy::useless_let_if_seq,
-    clippy::useless_transmute,
-    clippy::verbose_file_reads,
-    // clippy::wildcard_dependencies,
-)]
-#![allow(clippy::non_ascii_literal)]
-
 use crate::coverage::Subcommand;
 use clap::Parser;
 use std::env;