Node.js)백준 15663번: N과 M (9)

https://www.acmicpc.net/problem/15663

15663번: N과 M (9)

const input = require('fs').readFileSync('./dev/stdin').toString().trim().split('\n').map(v=>v.trim())
const [N,M] = input[0].split(' ').map(Number);
const nums = input[1].split(' ').map(Number).sort((a,b)=>a-b);

const answer = [];
solve([],0)
console.log([...new Set(answer)].join('\n'))


function solve(arr,used){
  if(arr.length==M){
    answer.push(arr.join(' '))
  }else{
    for(let i = 0; i<nums.length; i++){
      if(!(used&(1<<i))){
        solve([...arr,nums[i]],used|(1<<i))
      }
    }
  }
}