Submission

Score: 100

User: Peerawat

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-01-30 21:08:11

#include <stdio.h>
int main(){
    int n;
    long long a1=1,a2=1,a3;
    scanf("%d", &n);

    for(int i = 1 ; i<n-1 ; i++){
        a3 = a1;
        a1 = a1 + a2;
        a2 = a3;
    }
printf("%lld\n", a1);
}