递推题解

递推题解#include<bits/stdc++.h>
using namespace std;
int main(){
int n,a[1001]={0,1,1};
cin>>n;
for(int i=3;i<=n;i++){
a[i] = a[i-1] + a[i-2];
}
cout<<a[n];
return 0;
}