Submission

Score: 100

User: Weathery

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-03 17:41:54

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    if (n<3) {
    	cout << "1";
    } else {
    	long long a=1,b=1,c;
    	for (int i=2;i<n;i++){
    		c=a+b;
    		a=b;
    		b=c;
    	}
    	cout << b;
    }
    return 0;
}