Not getting full AC in "THEATRE" help plz!

QUESTION:


APPROACH:
4 times
I found the maximum in the 4x4 matrix and the row and the coloumn which contained the maximum set to -1.
used that to find profit .
IS something wrong?
CODE:-
 #include <iostream>
#include<algorithm>
#include<vector>
#include<set>
#include<string>
using namespace std;

int main() {
long int t,tot=0;
cin>>t;
while(t--)
{
    long int i,j,n;
    cin>>n;
    long int f[4][4]={0};
    for(i=0;i<n;i++)
    {
        char pic;
        cin>>pic;
       long  int num=(pic)-'A';
        long int time ;
        cin>>time;
        time=(time/3)-1;
        f[num][time]++;
    }

    long int maxi=0;
    long int ind1=0,ind2=0;
   long  int profit=0;
    long int cnt=4;
    while(cnt>0)
    {
    for(i=0;i<4;i++)
    {
        for(j=0;j<4;j++)
        {
            if(f[i][j]>maxi)
            {
                maxi=f[i][j];
                ind1=i;
                ind2=j;
            }
        }
    }
    for(i=0;i<4;i++)
    {
        for(j=0;j<4;j++)
        {
            if(i==ind1 || j==ind2)
            {
                f[i][j]=-1;
            }
        }
    }

    if(maxi!=0)
    profit=(cnt*25)*maxi+profit;
    else
        profit=profit-100;
    cnt--;

    maxi=0;
    }

tot=tot+profit;
    cout<<profit<<endl;
}
cout<<tot;
return 0;
}

PLZ HELP thanks in advance!