Money In Bank | Codestudio Solution

 Money In Bank | Codestudio Solution

Harshit wants to save money for his first car. So, he puts money in the Ninja bank every day.

He starts by putting in ‘1’ rupee on Monday, the first day. Every day from Tuesday to Sunday, he will put in ‘1’ rupee more than the day before. On every subsequent Monday, he will put in ‘1’ rupee more than the previous Monday.

You are given an integer ‘N’, your task is to return the total amount of money he will have in the Ninja bank at the end of the ‘N’th day.

For example :

Given ‘N’ = 2 
On Day 1 = 1
On Day 2 = 2 
Total Amount = 1 + 2 = 3.
Therefore the answer is 3.

Input Format :

The first line of input contains an integer ‘T’ denoting the number of test cases. The 'T' test cases follow.

The first and the only line of each test case contains a single integer ‘N’ denoting the number of days.

Output Format :

For each test case, print an integer denoting the total amount of money after N days.

The output of each test case will be printed in a separate line.

Constraints :

1 <= T <= 10
1 <= N <= 5000

Time limit: 1sec.

Sample Input 1 :

2
2
7

Sample Output 1 :

3
28

Explanation Of Sample Input 1 :

For first test case :  
On Day 1 = 1
On Day 2 = 2 
Total Amount = 1 + 2 = 3.
Therefore the answer is 3.

For Second Test case :
On Day 1 = 1
On Day 2 = 2  
On Day 3 = 3 
On Day 4 = 4 
On Day 5 = 5 
On Day 6 = 6 
On Day 7 = 7 
Total Amount = 1 + 2 + 3 + 4 + 5 + 6 + 7= 28.
Therefore the answer is 28.

Sample Input 2 :

2
8 
9

Sample Output 2 :

30
33 

#include<bits/stdc++.h>
int totalMoney(int n)
{
    int total=n/7;
    int rem=n%7;
       int ans=0,coin=1;
    for(int i=0; i<total; i++)
        ans+=21+7*coin++;
    
     for(int i=0; i<rem; i++)
         ans+=coin++;
     
    return ans;
    
}
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