题解 | 吃糖果

#include<iostream>
using namespace std;
const int maxn=20;
int main(){
    int answer[maxn];
    answer[0]=0;
    answer[1]=1;
    answer[2]=2;
    for(int i=3;i<maxn;i++){
        answer[i]=answer[i-1]+answer[i-2];
    }
    int n;
    cin>>n;
    cout<<answer[n]<<endl;
}