Cent saving

#include <bits/stdc++.h>

#define i64 long long
using namespace std;

int main(){
  cin.sync_with_stdio(0);
  cin.tie(0);
  
  int tests; cin >> tests;
  i64 p[101010];
  while(tests--){
    int n; cin >> n;
    i64 sum = 0;
    for(int i = 0; i < n; i++){
      cin >> p[i];
      if(p[i]%5 < 3)
	sum+=p[i]-(p[i]%5);
      else
	sum+=p[i]+(5-p[i]%5);
    }
    i64 c[5] = {0};
    
    for(int i = 0; i < n; i++)
      c[p[i]%5]++;
    i64 be = 0;
    i64 m34 = min(c[3], c[4]);
    be = max(be, m34*5+(c[3]-m34)/2*5+(c[4]-m34)/3*5);
    i64 be2 = c[3]/2*5+c[4]/3*5;
    if(c[3]%2==1 && c[4]%3 > 0)
      be2+=5;
    be = max(be, be2);
    cout << sum-be << endl;
  }
    
    
  return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED