Submission #3789100

---

Source Code Expand

#include<iostream>
#include<vector>
using namespace std;

vector<long long int> ans(100);
void cal(){
    ans[0] = 2;
    ans[1] = 1;
    for(int i = 2; i < 87; i++){
        ans[i] += (ans[i - 1] + ans[i - 2]);
        //cout << ans[i] << endl;
    }
}

int main(){
    cal();

    int n;
    cin >> n;

    cout << ans[n] << endl;
    
    return 0;
}

Submission Info

Judge Result