#include <iostream>
using namespace std;

int main() {
    int burst_time[3], waiting_time[3], total_waiting_time = 0;
    float average_waiting_time;
    int completion_time[3];

    cout << "Enter Burst Time for 3 processes:\n";
    for (int i = 0; i < 3; i++) {
        cout << "Process " << i + 1 << ": ";
        cin >> burst_time[i];
    }

    waiting_time[0] = 0;

    for (int i = 1; i < 3; i++) {
        waiting_time[i] = waiting_time[i - 1] + burst_time[i - 1];
    }

    average_waiting_time = total_waiting_time / 3.0;

    completion_time[0] = burst_time[0];
    for (int i = 1; i < 3; i++) {
        completion_time[i] = completion_time[i - 1] + burst_time[i];
    }

    cout << "\nProcess\t   Burst Time\t   Waiting Time\n";
    for (int i = 0; i < 3; i++) {
        cout << "P" << i + 1 << "\t   " << burst_time[i] << "\t\t   " << waiting_time[i] << endl;
    }

    cout << "\nAverage Waiting Time: " << average_waiting_time << " units\n";

    cout << "\nGantt Chart:\n";
    cout << waiting_time[0] << " [P1] " << completion_time[0];
    for (int i = 1; i < 3; i++) {
        cout << " [P" << i + 1 << "] " << completion_time[i];
    }
    cout << "\n";

    return 0;
}