View Code of Problem 3695

#include<stdio.h>
#include<string.h>
#include<math.h>
int main()
{
	int t,i;
	scanf("%d",&t);
	while(t--)
	{
		int n,d,sum=0;
		scanf("%d",&n);
		int a[90]={0};
		a[1]=1;
		a[2]=2;
		for(i=3;i<=n;i++)
		{
			a[i]=a[i-1]+a[i-2];
		}
		for(i=1;i<=n;i++)
		{
			sum=sum+a[i];
		}
		printf("%d\n",sum);
	}
	return 0;
}