Submission

Score: 100

User: FIrmTInn

Problemset: อนุกรม

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-13 21:35:18

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


    return 0;
}