#include <stdio.h>

int main() {
    int n;
    printf("Enter Number of Rows:");
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) 
    {
        for (int j = 1; j <= i; j++) 
        {
            if (j == 1 || j == i || i == n)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }
    return 0;
}