Help me in solving LPYAS164 problem

My issue

problem what

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 < N - i; j++) {
            printf(" * ");
        }

       
        for (int j = 0; j < 2 * i; j++) {
            printf(" ");
        }

       
        for (int j = 0; j < N - 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