题解博客:1196：踩方格

1196：踩方格

#include <iostream>
#include <cstdio>
using namespace std;
int a[21];
int main()
{
    int n,i;
    scanf("%d",&n);
    a[1]=3;
    a[2]=7;
    for(i=3;i<=n;i++)
    {
        a[i]=a[i-1]*2+a[i-2];
    }
    printf("%d",a[n]);
} 

标签：std,int,题解,1196,方格,include
来源： https://www.cnblogs.com/Tiger-2010-12-3/p/16250417.html