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

int main()
{
    pid_t pid;
    int n;

    printf("Enter nice value for child:");
    scanf("%d",&n);
    pid=fork();

    if(pid<0)
    {
        printf("Fork Failed\n");
    }
    else if(pid==0)
    {
        printf("Child Process\n");
        printf("Child PID:%d\n",getpid());
        nice(n);
        printf("Child value increased by %d\n",n);
    }
    else
    {
        wait(NULL);
        printf("Parent Process\n");
        printf("Parent PID:%d",getpid());
    }
    return 0;
}