[알고리즘] 백준 1157번: 단어 공부 W_node.js

문제

https://www.acmicpc.net/problem/1157

1157번: 단어 공부

풀이

const readFileSyncAddress = '/dev/stdin';

const fs = require('fs');
let S = fs.readFileSync(readFileSyncAddress).toString().trim().toUpperCase();

let str = new Map();
for (let x of S) {
  if (str.has(x)) str.set(x, str.get(x) + 1);
  else str.set(x, 1);
}

let max = Number.MIN_SAFE_INTEGER;
let answer = '';
for (let [key, val] of str) {
  if (val > max) {
    max = val;
    answer = key;
  } else if (val === max) answer = '?';
}

console.log(answer);