1716. Calculate Money in Leetcode Bank (LeetCode) (solution: C++, C#)

Problem Name: 1716. Calculate Money in Leetcode Bank

Problem Link: https://leetcode.com/problems/calculate-money-in-leetcode-bank/

Difficulty: Easy

Tag: Math

Language: C# | C++

OJ: LeetCode

Algorithm:

1.Calculate Full Cycles:

✅Determine the number of complete 7-week cycles in the total number of weeks.

2.Update Remaining Weeks:

✅Update the total number of weeks to be the remainder after dividing by 7. This represents the remaining weeks after completing full cycles.

3.Initialize Sum:

✅Initialize a variable sum to keep track of the total amount of money.

4.Calculate Sum for Completed Cycles:

✅Iterate through each completed 7-week cycle.

✅Add a fixed amount of 21 units plus an additional amount based on the cycle number multiplied by 7.

5.Calculate Sum for Remaining Weeks:

✅Iterate through the remaining weeks.

✅Add the portion (number of full cycles) to each remaining week.

6.Return Total Sum:

✅Return the calculated total sum.

Code(C#)

public class Solution

{

public int TotalMoney(int n)

{

int portion = (n / 7);

n %= 7;

int sum = 0;

for(int i=1; i<=portion; i++)

sum += (21 + (i * 7));

for (int i = 1; i <= n; i++)

sum += (portion+i);

return sum;

}

Code(C++)

class Solution {

public:

int totalMoney(int n) {