View Code of Problem 51

#include<stdio.h>
main(){
  int n;
  int a[10][10];
  int sum=0;
  scanf("%d",&n);
  for(int j=0;j<n;j++){
    for(int i=0;i<n;i++)
  {
    scanf("%d",&a[j][i]);
  }
  }
  for(int i=0;i<n;i++)
  {
    for(int j=0;j<i;j++)
      sum+=a[i][j];
  }
  printf("%d",sum);
}

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