Submission

Score: 100

User: Ballmaii

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-08 00:17:14

#include <iostream>
using namespace std;
int main()
{
    long long int n,s1=1,s2=1,m=0;
    cin>>n;
    if(n<=2)
    {
        cout<<"1";
        return 0;
    }
    for(int i=2;i<n;i++)
    {
        m = s1+s2;
        s1 = s2;
        s2 = m;
    }
    cout<<m;

}