네이버 문제

1 0 0 0 0
2 3 0 0 0
4 5 6 0 0
7 8 9 10 0
11 12 13 14 15

# include <stdio.h>

int main(void) {

int num = 1;

int kNum = 1;

for (int i = 1; i <= 5; i++) {

for (int j = 1; j <= num; j++) {

printf("%02d ", kNum++);

}

for (int k = num + 1; k <= 5; k++) {

printf("%02d ", 0);

}

printf("\n");

num++;

}

return 0;

}