View Code of Problem 3695

#include<iostream>
#include<cstring>
#include<algorithm>
#include<stdio.h>
using namespace std; 
int main(){
	int t;
	cin>>t;
	long long int a[100];
	
	while(t--){
	a[1]=1;
	a[2]=2;
		int n;
		cin>>n;
		for(int i=3;i<=n;i++){
			a[i]=a[i-1]+a[i-2];
		}
		long long int sum=0;
		for(int i=1;i<=n;i++)
		{
			sum=sum+a[i];
		}
		cout<<sum<<endl;
	}
	return 0;
}