diff --git "a/5\354\243\274\354\260\250/12914/12914_\352\271\200\355\230\225\354\244\200.js" "b/5\354\243\274\354\260\250/12914/12914_\352\271\200\355\230\225\354\244\200.js"
new file mode 100644
index 0000000..59d3e1b
--- /dev/null
+++ "b/5\354\243\274\354\260\250/12914/12914_\352\271\200\355\230\225\354\244\200.js"
@@ -0,0 +1,11 @@
+function solution(n) {
+  let answer = 0; 
+      let sol1 = 0;
+      let sol2 = 1;
+  for(let i = 2 ; i <= n + 1 ; i++) {
+      answer = sol1 + sol2 % 1234567;
+      sol1 = sol2;
+      sol2 = answer;
+  }
+  return answer % 1234567;
+}
\ No newline at end of file
diff --git "a/5\354\243\274\354\260\250/131127/131127_\352\271\200\355\230\225\354\244\200.js" "b/5\354\243\274\354\260\250/131127/131127_\352\271\200\355\230\225\354\244\200.js"
new file mode 100644
index 0000000..afb90b7
--- /dev/null
+++ "b/5\354\243\274\354\260\250/131127/131127_\352\271\200\355\230\225\354\244\200.js"
@@ -0,0 +1,21 @@
+function solution(want, number, discount) {
+  let cnt = 0;
+  let cntArr = new Array(number.length).fill(0);
+
+  const equals = (a, b) => JSON.stringify(a) === JSON.stringify(b);
+
+  for (let i = 0; i < discount.length; i++) {
+    let thing = discount[i];
+
+    if (want.includes(thing)) {
+      cntArr[want.indexOf(thing)]++;
+    }
+
+    if (i >= 9) {
+      if (want.includes(discount[i - 10]))
+        cntArr[want.indexOf(discount[i - 10])]--;
+      if (equals(number, cntArr)) cnt++;
+    }
+  }
+  return cnt;
+}
\ No newline at end of file
diff --git "a/5\354\243\274\354\260\250/17680/17680_\352\271\200\355\230\225\354\244\200.js" "b/5\354\243\274\354\260\250/17680/17680_\352\271\200\355\230\225\354\244\200.js"
new file mode 100644
index 0000000..94ec308
--- /dev/null
+++ "b/5\354\243\274\354\260\250/17680/17680_\352\271\200\355\230\225\354\244\200.js"
@@ -0,0 +1,27 @@
+function solution(cacheSize, cities) {
+  const cache = [];
+  let time = 0;
+  
+  if (!cacheSize) return cities.length * 5;
+  
+  for (let city of cities) {
+      let upperCase = city.toUpperCase();
+      if (cache.includes(upperCase)) {
+          time += 1;
+          cache.splice(cache.indexOf(upperCase), 1);
+          cache.push(upperCase);
+          continue;
+      } 
+      
+      if (cache.length === cacheSize) {
+          cache.shift();
+          cache.push(upperCase);
+          time += 5;
+          continue;
+      }
+      
+      cache.push(upperCase);
+      time += 5;
+  }
+  return time;
+}
\ No newline at end of file