problem in adding two dimensional array.

Question

#include <iostream>
using namespace std;
int main(){
long long int n,m;
cin>>n>>m;
long long int arr[n][m];
for(unsigned i=0;i<n;i++){
for(unsigned j=0;j<m;j++){
cin>>arr[i][j];
}
}
int sum=0;
for(unsigned j=0;j<m;j++){
for(unsigned i=0;i<n;i++){
sum+=arr[i][j];
}
cout<<sum<<" ";
sum=0;
}

return 0;
}

for input like:
5 6
4 5 0 7 7 0
6 4 6 2 1 4
2 0 3 9 0 1
0 5 6 9 8 1
4 7 9 8 8 9
the correct output is:
16 21 24 35 24 15
and it is correct but test case three is failing as wrong answer. The program only has to add elements column vise and print the output.

Answer 1

it worked I got it, only I had to make the data type of sum = long long int..
IN between writing the question