Submission

Score: 100

User: RandomPerson

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-12 16:22:51

#include <iostream>
using namespace std;
int main() {
    long long int x,y[91];
    for (int i=1;i<=90;i++) {
        if (i==1 || i==2) {
            y[i]=1;
        }
        else {
            y[i]=y[i-1]+y[i-2];
        }
    }
    cin >> x;
    if (x>0 && x<=90) {
        cout << y[x];
    }
    return 0;
}