Given ‘T’ which represents the total number of items a person has. ‘P’ represents the price of each item and ‘M’ represents the number of free items he gets free if he buys ‘N’ items. The task is to find the total amount the person has to pay to get T items.
Examples:
Input: T = 13, P = 10, N = 3, M = 1
Output: Amount = 100
Explanation:
Total number of fruit bottle a person has = 13
Offer available is buy 3 get 1 free
So, person has to buy 9 Fruit juice bottle to get 3 fruit juice bottle for free.
Now, since the total number of the bottle is 13 so the person buys 1 bottle at P price.
The total amount the person has to pay = (9 + 1) * 10 i.e 100
Input: T = 12, P = 8, N = 2, M = 1
Output: Amount = 64
Approach:
- First of all, we should try to get free items as much as possible, so this can reduce the cost.
- Divide the total number of items with the sum of N and M because we get M free items when we buy atleast N items.
- Then calculate the total number of items for which you have to pay for by subtracting the free items from the total number of items
- Finally the price can be calculated by multiplying the cost of one item with the total number of items.
Below is the implementation of the above approach:
C++
// C++ program of above approach #include <bits/stdc++.h> using namespace std; // Function that will calculate the price int totalPay( int totalItems, int priceOfOneItem, int N, int M) { int freeItems = 0, actual = 0; // Calculate the number of items // we can get for free freeItems = totalItems / (N + M); // Calculate the number of items // we will have to pay the price for actual = totalItems - freeItems; // Calculate the price int amount = actual * priceOfOneItem; return amount; } // Driver code int main() { int T = 12, P = 8; int N = 2, M = 1; // Calling function cout << "Amount = " << totalPay(T, P, N, M); return 0; } |
Java
// Java implementation of the approach class GFG { // Function that will calculate the price static int totalPay( int totalItems, int priceOfOneItem, int N, int M) { int freeItems = 0 , actual = 0 ; // Calculate the number of items // we can get for free freeItems = totalItems / (N + M); // Calculate the number of items // we will have to pay the price for actual = totalItems - freeItems; // Calculate the price int amount = actual * priceOfOneItem; return amount; } // Driver code public static void main(String[] args) { int T = 12 , P = 8 ; int N = 2 , M = 1 ; // Calling function System.out.print( "Amount = " + totalPay(T, P, N, M)); } } // This code is contributed by 29AjayKumar |
Python3
# Python3 program of above approach # Function that will calculate the price def totalPay(totalItems, priceOfOneItem, N, M): freeItems = 0 actual = 0 # Calculate the number of items # we can get for free freeItems = totalItems / / (N + M) # Calculate the number of items # we will have to pay the price for actual = totalItems - freeItems # Calculate the price amount = actual * priceOfOneItem return amount # Driver code T = 12 P = 8 N = 2 M = 1 # Calling function print ( "Amount = " , totalPay(T, P, N, M)) # This code is contributed by Mohit Kumar |
C#
// C# implementation of the approach using System; class GFG { // Function that will calculate the price static int totalPay( int totalItems, int priceOfOneItem, int N, int M) { int freeItems = 0, actual = 0; // Calculate the number of items // we can get for free freeItems = totalItems / (N + M); // Calculate the number of items // we will have to pay the price for actual = totalItems - freeItems; // Calculate the price int amount = actual * priceOfOneItem; return amount; } // Driver code public static void Main(String[] args) { int T = 12, P = 8; int N = 2, M = 1; // Calling function Console.Write( "Amount = " + totalPay(T, P, N, M)); } } // This code is contributed by PrinciRaj1992 |
Javascript
<script> // Javascript program of above approach // Function that will calculate the price function totalPay(totalItems, priceOfOneItem, N, M) { var freeItems = 0, actual = 0; // Calculate the number of items // we can get for free freeItems = totalItems / (N + M); // Calculate the number of items // we will have to pay the price for actual = totalItems - freeItems; // Calculate the price var amount = actual * priceOfOneItem; return amount; } // Driver code var T = 12, P = 8; var N = 2, M = 1; // Calling function document.write( "Amount = " + totalPay(T, P, N, M)); </script> |
Amount = 64
Time Complexity: O(1)
Auxiliary Space: O(1)
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!