#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/wait.h>

void child() {
  sleep(2);
  printf("Child\n");
}

void parent(int N) {
  int i;
  for(i=0; i<N; i++){
    wait(NULL);
  }
  printf("Parent\n");
}

int main () {
  printf("Hello\n");

  pid_t PID;

  int N = 4; 

  int i;
  for (i=0; i<N; i++) {
    PID = fork();
	//printf("After fork\n");
    if (PID == 0) {
      break; 
    } else if (PID < 0) {
      exit(EXIT_FAILURE);
    }
  }
 
  if (PID == 0) {
    child();
  } else if(PID > 0){
    parent(N);
  }else{
    exit(EXIT_FAILURE);
  }
  
  if(PID == 0){
    _exit(EXIT_SUCCESS);
  }
  exit(EXIT_SUCCESS);
}