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#include <stdio.h>
#include <stdlib.h>

#define n 10
#define ts 5  

struct process {
    int pid;
    int cpu_time;
};


struct process cqueue[n];
int front = 0, rear = 0, count = 0;

// Function to add
void addqueue(int pid, int cpu_time) {
    if (count == n) {
        printf("Queue is full. Cannot add process.\n");
        return;
    }
    cqueue[rear].pid = pid;
    cqueue[rear].cpu_time = cpu_time;
    rear = (rear + 1) % n;
    count++;
}

// Function to delete
struct process dequeue() {
    if (count == 0) {
        printf("Queue is empty. Cannot delete process.\n");
        exit(1);
    }
    struct process temp = cqueue[front];
    front = (front + 1) % n;
    count--;
    return temp;
}

// Function to simulate process execution
void pprint() {
    while (count > 0) {
        struct process temp = dequeue();
        int t = (temp.cpu_time < ts) ? temp.cpu_time : ts;
        printf("Process %d is running for %d nanoseconds.\n", temp.pid, t);
        temp.cpu_time -= t;
        if (temp.cpu_time > 0) {
            addqueue(temp.pid, temp.cpu_time);
        }
    }
}

int main() {
    int num_processes;
    printf("Enter the number of processes: ");
    scanf("%d", &num_processes);

    for (int i = 0; i < num_processes; i++) {
        int pid, cpu_time;
        printf("Enter process ID for process %d: ", i + 1);
        scanf("%d", &pid);
        printf("Enter CPU time for process %d: ", i + 1);
        scanf("%d", &cpu_time);
        addqueue(pid, cpu_time);
    }
    pprint();

    return 0;
}