diff --git "a/live8/test86/\353\254\270\354\240\2341/\355\231\251\354\236\245\355\230\204.js" "b/live8/test86/\353\254\270\354\240\2341/\355\231\251\354\236\245\355\230\204.js"
new file mode 100644
index 00000000..9ab127f9
--- /dev/null
+++ "b/live8/test86/\353\254\270\354\240\2341/\355\231\251\354\236\245\355\230\204.js"
@@ -0,0 +1,35 @@
+const input = require('fs')
+  .readFileSync(process.platform === 'linux' ? '/dev/stdin' : './input.txt')
+  .toString()
+  .trim()
+  .split('\n')
+  .map((el) => el.split(' ').map(Number));
+
+function solution(input) {
+  const [N, M] = input[0];
+  const treeH = input[1].sort((a, b) => a - b);
+
+  let start = 0;
+  let end = treeH[treeH.length - 1];
+  let answer = 0;
+
+  while (start <= end) {
+    let mid = Math.floor((start + end) / 2);
+    let sum = 0;
+
+    for (let x of treeH) {
+      if (x > mid) sum += x - mid;
+    }
+
+    if (sum >= M) {
+      answer = mid;
+      start = mid + 1;
+    } else {
+      end = mid - 1;
+    }
+  }
+
+  return answer;
+}
+
+console.log(solution(input));
diff --git "a/live8/test86/\353\254\270\354\240\2342/\355\231\251\354\236\245\355\230\204.js" "b/live8/test86/\353\254\270\354\240\2342/\355\231\251\354\236\245\355\230\204.js"
new file mode 100644
index 00000000..3c74bc53
--- /dev/null
+++ "b/live8/test86/\353\254\270\354\240\2342/\355\231\251\354\236\245\355\230\204.js"
@@ -0,0 +1,28 @@
+const input = require('fs')
+  .readFileSync(process.platform === 'linux' ? '/dev/stdin' : './input.txt')
+  .toString()
+  .trim()
+  .split('\n')
+  .map((el) => el.split(' ').map(Number));
+
+function solution(input) {
+  const N = input[0][0];
+  const 지방예산요청 = input[1].sort((a, b) => a - b);
+  const M = input[2][0];
+
+  let high = 지방예산요청[N - 1];
+  let low = 0;
+
+  while (low <= high) {
+    const mid = Math.floor((low + high) / 2);
+    const sum = 지방예산요청.reduce((acc, v) => acc + (v <= mid ? v : mid), 0);
+    if (sum > M) {
+      high = mid - 1;
+    } else {
+      low = mid + 1;
+    }
+  }
+  return high;
+}
+
+console.log(solution(input));
diff --git "a/live8/test86/\353\254\270\354\240\2343/\355\231\251\354\236\245\355\230\204.js" "b/live8/test86/\353\254\270\354\240\2343/\355\231\251\354\236\245\355\230\204.js"
new file mode 100644
index 00000000..e6d0eacf
--- /dev/null
+++ "b/live8/test86/\353\254\270\354\240\2343/\355\231\251\354\236\245\355\230\204.js"
@@ -0,0 +1,33 @@
+function solution(files) {
+  let answerWrap = files.map((file, index) => ({ file, index }));
+
+  const compare = (a, b) => {
+    const reg = /(\D*)([0-9]*)/i;
+    const A = a.match(reg);
+    const B = b.match(reg);
+
+    const compareHead = A[1].toLowerCase().localeCompare(B[1].toLowerCase());
+    const compareNumber = (a, b) => {
+      return parseInt(a) > parseInt(b) ? 1 : parseInt(a) < parseInt(b) ? -1 : 0;
+    };
+    return compareHead === 0 ? compareNumber(A[2], B[2]) : compareHead;
+  };
+
+  answerWrap.sort((a, b) => {
+    const result = compare(a.file, b.file);
+    return result === 0 ? a.index - b.index : result;
+  });
+
+  return answerWrap.map((answer) => answer.file);
+}
+
+console.log(
+  solution([
+    'img12.png',
+    'img10.png',
+    'img02.png',
+    'img1.png',
+    'IMG01.GIF',
+    'img2.JPG',
+  ])
+);