Below is the link to problem:
Below is my code ,i want to know in which case its failing.
#include<iostream>
#include<cstdio>
#define FAST_IO ios_base::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
int main()
{
FAST_IO
unsigned long int R,C;
cin>>R>>C;
unsigned long long int Arr[R][C],smallest_index,largest_index,largest_value,flag=0,r,prev_largest_value,max=0,min=100000001 ;
for(int i=0;i<R;i++)
{
for(int j=0;j<C;j++)
cin>>Arr[i][j];
}
for(int i=0;i<C;i++)
{
flag=0;
max=0;min=100000001 ;
for(int j=0;j<R;j++)
{
if(Arr[j][i]>max)
{
max=Arr[j][i];
largest_index=j;
}
}
for(int j=0;j<C;j++)
{
if(Arr[largest_index][j]<=min)
{
min=Arr[largest_index][j];
//smallest_index=j;
}
}
if(min==max)
{
flag=1;
break;
}
}
if(flag==1)
cout<<max<<"\n";
else
cout<<"GUESS"<<"\n";
return 0;
}