[etc] 백준 16674 2018년을 되돌아보며

https://www.acmicpc.net/problem/16674

#include <iostream>
using namespace std;
 
int main(){
    int cnt[5] = {0};
    bool chk[4] = {0};
    string s;
    cin >> s;
    
    int size = s.size();
    for(int i = 0; i  < size; i++){
        switch(s[i]){
            case '2':
                cnt[0] +=1;
                break;
            case '0':
                cnt[1] +=1;
                break;
            case '1':
                cnt[2] +=1;
                break;
            case '8':
                cnt[3]+=1;
                break;
            default:
                cnt[4] +=1;
        }
    }
    
    if(cnt[4])chk[3] = true;
    else if(((cnt[0] == cnt[1]) && cnt[1] == cnt[2]) && cnt[2] == cnt[3])    chk[2] = true;
    else if(cnt[0] >=1 && cnt[1] >=1 &&cnt[2] >=1 &&cnt[3] >=1 )   chk[1] = true;
    else if(cnt[0] >=1 || cnt[1] >=1 || cnt[2] >=1 || cnt[3] >=1 ) chk[0] = true;
    
    
 
    
    for(int i = 3; i >= 0; i--){
        if(chk[i]){
            if(i == 3) cout << 0;
            else if(i == 2) cout << 8;
            else cout << i+1;
            break;
        }
    }
}