/FPT001 - Tạo ma trận đơn giản
<Problem>
https://code.ptit.edu.vn/student/question/FTP001#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#define max(i, j) ((i > j) ? i : j)
#define min(i, j) ((i < j) ? i : j)
int main() {
int t;
//scanf("%d", &t);
t = 1;
while (t--) {
int n;
scanf("%d", &n);
int arr[1000][1000];
int start = 1;
for (int i = 0; i < n; i++) {
int cnt = 1;
for (int j = 0; j < n; j++) {
if (j >= start) arr[i][j] = cnt++;
else arr[i][j] = 0;
}
start++;
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
printf("%d ", arr[i][j]);
}
printf("\n");
}
}
return 0;
}