Multiples Power

PROBLEM :

Calculate the sum of all the multiples of 3 or 7 below the natural number N.

Input:

First line contains T that denotes the number of test cases. This is followed by T lines, each containing an integer, N.
Output:
For each test case, print an integer that denotes the sum of all the multiples of 3 or 7 below N.

Constraints:

1 = T = 50
1 = N = 100000

Example:

Input:

2
1
20

Output:
25
84
     
--------------------------------------------------------------------------------
SIMPLE c++ IMPLEMENTATION :
--------------------------------------------------------------------------------

#include<iostream>
using namespace std;
long long calculate_sum(long long ) ;
int main()
 {
long long sum,no ;
int t ;
cin>>t ;
while(t--)
{
   cin>>no ;
 
   sum=calculate_sum(no) ;
   cout<<sum<<endl ;
}
return 0;
}

long long calculate_sum(long long no)
{
    long long i,sum ;
    sum=0 ;
   
    for(i=1;i<no;i++)
    {
        if(i%3==0||i%7==0)
            sum=sum+i ;
    }
    return sum ;
}

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