import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scan=new Scanner(System.in); int n=scan.nextInt(); int[][] a=new int[n][n]; for(int i=0;i<n;i++) { for(int j=0;j<n;j++) { a[i][j]=scan.nextInt(); } } int sum=0; for(int i=0;i<n;i++) { for(int j=0;j<i;j++) { sum=sum+a[i][j]; } } System.out.println(sum); } } |
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