Submission #2236065

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Source Code Expand

#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;

    if (n == 1) {
        cout << "1" << endl;
    } else {
        long long int L0 = 2LL, L1 = 1LL, ans = 0LL;
        for (int i = 2; i <= n; i++) {
            ans = L0 + L1;
            L0 = L1;
            L1 = ans;
        }
        cout << ans << endl;
    }

    return 0;
}

Submission Info

Judge Result