View Code of Problem 51

#include <stdio.h>
#define N 10
int main(){
    int n,sum;
    scanf("%d",&n);
    if(n>1&&n<10){
        int arr[N][N];
        getchar();
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                scanf("%d",&arr[i][j]);
            }
        }
        sum=0;
        for(int k=0;k<n;k++){
            for(int v=0;v<=k;v++){
                sum+=arr[v][k];
            }
        }
        printf("%d",sum);


    }




    return 0;
}

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