Submission

Score: 100

User: letdown

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-02 19:28:29

#include <iostream>
#include <math.h>
#include <string.h>

using namespace std;

int main() {
    int n;
    cin >> n;
    n++;
    unsigned long long int fib[10000] = {1, 1, 2, 3};
    if (n >= 3) {
        for (int i = 3; i <= n; i++) {
            fib[i] = fib[i - 1] + fib[i - 2];
        }
    }
    cout << fib[n-2] << endl;
}