70차 1번 제출

Author: egg-silver

live6/test70/문제1/이지은.js

@@ -0,0 +1,29 @@
+const input = require('fs')
+  .readFileSync(process.platform === 'linux' ? '/dev/stdin' : './input.txt')
+  .toString()
+  .trim()
+  .split('\n')
+  .map(Number);
+
+function combination(n, r) {
+  if (r > n || r < 0) return 0; 
+  r = Math.min(r, n - r);
+  let result = 1;
+  for (let i = 0; i < r; i++) {
+    result *= n - i;
+    result /= i + 1;
+  }
+  return result;
+}
+
+function solution(input) {
+  const [n, m] = input;
+
+  if (n > m) return 0; 
+
+  const remainingFruits = m - n; 
+  const result = combination(remainingFruits + n - 1, n - 1); 
+  return result;
+}
+
+console.log(solution(input));