Geeksforgeeks Solution For " Class Average "

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Problem :- Class Average

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Solution :- 

#include <iostream>
#include<cmath>
using namespace std;

int main() {
int t;
cin>>t;
while(t--)
{
   int n,i,a=1,b=2,c=0,sum=0;
   cin>>n;
   int arr[n];
   for(i=0;i<n;i++)
       cin>>arr[i];
       
arr[1]=(arr[1]*2)%100;
while(c<n)
{
  c=a+b;
  a=b;
  b=c;
  arr[c-1]=(arr[c-1]*c)%100;
  c++;
}
for(i=0;i<n;i++)
   sum+=arr[i];
cout<<floor(sum/n)<<endl;
  
}
return 0;
}

Output:-