Only The Child Loops

#include <stdio.h>
#include <unistd.h>

int main(void) {
    for (int i = 0; i < 3; i++) {
        if (fork() > 0)
            break;
    }
    printf("%d\n", (int) getpid());
    return 0;
}

How many lines does this program print in total, and how are the resulting processes related?