#include <stdio.h>
#include <unistd.h>
 
int main() {
    fork();                      // Creates a child process
    int pid = fork();            // Creates another child process and stores its PID
 
    printf("hello");             // This line will be executed by all processes
 
    if (pid > 0) {               // Code executed only by the parent process
        fork();                  // Creates yet another child process
        if (pid == 0)            // Code executed only by the child processes created by the second fork
            printf("hello");
    }
 
    return 0;
}
 

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

NDU=

45