View Code of Problem 3695

#include<stdio.h>
int main(){
	int t;
	scanf("%d",&t);
	while(t--){
		long long int a[100]={1,2},sum=0;
		int i,j,n;
		scanf("%d",&n);
		for(i=2;i<n;i++){
			a[i]=a[i-1]+a[i-2];
		}
		for(j=0;j<n;j++){
			sum+=a[j];
		}
		printf("%lld\n",sum);
	}
}