14888번 - 연산자 끼워넣기

https://www.acmicpc.net/problem/14888

14888번: 연산자 끼워넣기

#include <iostream>
#include <algorithm>
using namespace std;
int N;
int arr[12]; //수 저장
int arithmetic[4]; //연산자 저장
int maxResult = -1000000001;
int minResult = 1000000001;
void dfs(int plus, int minus, int multiply, int divide, int cnt, int sum)
{
  if(cnt == N)
  {
    maxResult = max(maxResult, sum);
    minResult = min(minResult, sum);
    return ;
  }
  
  if(plus>0)
    dfs(plus-1, minus, multiply, divide, cnt+1, sum+arr[cnt]);
  if(minus>0)
    dfs(plus, minus-1, multiply, divide, cnt+1, sum-arr[cnt]);
  if(multiply>0)
    dfs(plus, minus, multiply-1, divide, cnt+1, sum*arr[cnt]);
  if(divide>0)
    dfs(plus, minus, multiply, divide-1, cnt+1, sum/arr[cnt]);
}
int main()
{
  cin >> N;
  for(int i=0; i<N; i++)
    cin >> arr[i];
  for(int i=0; i<4; i++)
    cin >> arithmetic[i];
  //plus, minus, multiply, divide 넘겨주기
  dfs(arithmetic[0], arithmetic[1], arithmetic[2], arithmetic[3], 1, arr[0]);
  cout << maxResult << '\n';
  cout << minResult << '\n';
  return 0;
}