import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner scanner=new Scanner(System.in); int n=scanner.nextInt(); int[][] a=new int[n][n]; int sum=0; for(int i=0;i<n;i++) for(int j=0;j<n;j++) { a[i][j]=scanner.nextInt(); if(i>=j) sum+=a[i][j]; } System.out.println(sum); } } |
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