#include<stdio.h> #include<iostream> #include<string.h> using namespace std; int main() { int n; cin>>n; int sum = 0; int a[n][n]; for(int i=0;i<n;i++){ for(int j=0;j<n;j++){ cin>>a[i][j]; } } for(int i=0;i<n;i++){ for(int j=i;j<n;j++){ sum += a[i][j]; } } cout<<sum; return 0; } |
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