救救孩子吧，真不会呀，不要啊，宝贝

Question

Answer 1

#include <stdio.h>
int main()
{
    int f1=1,f2=1,fn;
    long long s = 0;
    int i,n;
    scanf("%d",&n);
    if(n == 1)
        printf("1 1");
    else if(n == 2)
        printf("1 2");
    else
    {
        s = 2;
        for(i=3;i<=n;i++)
        {
            fn = 3*f2 + 2*f1;
            s += fn;
            
            f1 = f2;
            f2 = fn;
        }
        printf("%d %lld",fn,s);
    }
        
    return 0;
}