#9715: C++ 正解


ian13456 (kerry sucks)


#include<iostream>
using namespace std;
int main()
{
int num;
while(cin >> num){
int arr[num];
arr[0] = 1;
arr[1] = 2;
for(int i = 2; i < num; i++){
arr[i] = arr[i-1] + arr[i-2];
}
cout << arr[num-1] << endl;
}
}