#include <stdio.h>

int main() {
    char c = '*';
    char s = ' ';
    int length = 5; 

    for (int i = 0; i < (length + 1) / 2; i++) {
        for (int j = 0; j < (length - 1) / 2 - i; j++) {
            printf("%c", s);
        }
        for (int j = 0; j < 2 * i + 1; j++) {
            printf("%c", c);
        }
        printf("\n");
    }

    for (int i = (length - 1) / 2; i >= 0; i--) {
        for (int j = 0; j < (length - 1) / 2 - i; j++) {
            printf("%c", s);
        }
        for (int j = 0; j < 2 * i + 1; j++) {
            printf("%c", c);
        }
        printf("\n");
    }
    return 0;
}