#include<bits/stdc++.h> using namespace std; int main(){ int n; int sum = 0; cin >> n; 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=0;j<=i;j++){ sum+=A[i][j]; } } cout << sum; } |
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