Submission

Score: 90

User: kimza

Problemset: อนุกรม

Language: cpp

Time: 1.095 second

Submitted On: 2025-10-08 22:47:35

#include <iostream>
using namespace std;
int main() {
    unsigned long long n;
    unsigned long long a = 1;
    unsigned long long b = 1;
    unsigned long long c = 0;
    cin >> n;
    for(unsigned long long i = 0;i<n-2;i++){
        c = a+b;
        a = b;
        b = c;
    }
    cout << c;
    
    return 0;
}