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