Help me in solving LPYAS164 problem

help
,
1

My issue

my code failed on hidden test case why

My code

#include <stdio.h>
int main() {
    int N;
    scanf("%d", &N);

    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N - i; j++) {
            printf("*");
        }
        for (int j = 0; j < 2 * i; j++) {
            printf(" ");
        }
        for (int j = 0; j < N - i; j++) {
            printf("*");
        }
        printf("\n");
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j <= i; j++) {
            printf("*");
        }
        for (int j = 0; j < 2 * (N - i - 1); j++) {
            printf(" ");
        }
        for (int j = 0; j <= i; j++) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

Learning course: Algorithmic Problem Solving
Problem Link: https://www.codechef.com/learn/course/klu-problem-solving/KLUPS00A/problems/LPYAS164