Bella Ciao CodeChef Solution | CHFHEIST

Hello coders, today we are going to solve Bella Ciao CodeChef Solution in C++, Java and Python.

Task

Chef is planning a heist in the reserve bank of Chefland. They are planning to hijack the bank for D days and print the money. The initial rate of printing the currency is P dollars per day and they increase the production by Q dollars after every interval of d days. For example, after d days the rate is P+Q dollars per day, and after 2d days the rate is P+2Q dollars per day, and so on. Output the amount of money they will be able to print in the given period.

Input Format

  • The first line contains an integer T, the number of test cases. Then the test cases follow.
  • Each test case contains a single line of input, four integers D,d,P,Q.

Output Format

For each test case, output in a single line the answer to the problem.

Constraints

  • 1≤T≤105
  • 1≤d≤D≤106
  • 1≤P,Q≤106

Subtasks
Subtask #1 (15 points): d≤D≤100
Subtask #2 (85 points): original constraints

Sample Input

3
2 1 1 1
3 2 1 1
5 2 1 2

Sample Output

3
4
13

Explanation

Test Case 1:

  • On the first day, the rate of production is 1 dollar per day so 1 dollar is printed on the first day.
  • On the second day, the rate of production is 1+1=2 dollars per day so 2 dollars are printed on the second day.
  • The total amount of money printed in 2 days is 1+2=3 dollars.

Test Case 2:

  • For the first two days, the rate of production is 1 dollar per day so 1⋅2=2 dollars are printed on the first two days.
  • On the third day, the rate of production is 1+1=2 dollars per day so 2 dollars are printed on the third day.
  • The total amount of money printed in 3 days is 2+2=4 dollars.

Test Case 3:

  • For the first two days, the rate of production is 1 dollar per day so 1⋅2=2 dollars are printed on the first two days.
  • On the next two days, the rate of production is 1+2=3 dollars per day so 3⋅2=6 dollars are printed on the next two days.
  • On the last day, the rate of production is 3+2=5 dollars per day so 5 dollars are printed on the last day.
  • The total amount of money printed in 5 days is 2+6+5=13 dollars.

Solution – Bella Ciao CodeChef Solution

C++

#include <iostream>
using namespace std;

int main() {
	// your code goes here
	long t;cin>>t;
	while(t--){
	    long  D,d,p,q;
	    long ans=0;
	    cin >> D >> d >> p >> q;
	  long n = D/d;
	   ans = n*p*d + (q*(n*(n-1))/2)*d +(D%d)*(p+n*q);
	    cout << ans << endl;
	}
	return 0;
}

Java

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		//SOLUTION
		FastReader sc = new FastReader();
		long t = sc.nextLong();
		while(t-- > 0){
		long D,d,p,q;
		D = sc.nextLong();
		d = sc.nextLong();
		p = sc.nextLong();
		q = sc.nextLong();
		long n = D/d;
		long ans=0;
		ans = n*p*d + q*d*(n*(n-1))/2 + (D%d)*(p+n*q);
		System.out.println(ans);
		}
	}
	// SOLUTION ENDS
	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
}

Python

# cook your dish here
T = int(input())
for i in range(T):
    D, d, P, Q = map(int, input().split())
    n = D//d
    ans = n*P*d + (Q*(n*(n-1))//2)*d +(D%d)*(P+n*Q)
    print(ans)

Disclaimer: The above Problem (Bella Ciao) is generated by Hacker Rank but the Solution is Provided by CodinBroz. This tutorial is only for Educational and Learning Purpose.

3 thoughts on “Bella Ciao CodeChef Solution | CHFHEIST”

  1. when i used scanner class for taking input in the same code i got time limit exceeded error but when i used the Fast Reader class then i got the correct answer. i just wanna know what does that FastReader class do?

Leave a Comment

Your email address will not be published.