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