Submission

Score: 100

User: bbcctxp

Problemset: อนุกรม

Language: c

Time: 0.002 second

Submitted On: 2025-10-10 14:48:29

#include <stdio.h>

//1 1 2 3 5 8 13 21

long long fib(int n){
    long long a = 0, b = 1;
    long temp;
    if (n<=0) return 0;

    for(int i = 1; i<n; i++){
        temp = a+b;
        a=b;
        b=temp;
    }
    return b;
}

int main(){
    int n;
    scanf("%d", &n);

    printf("%lld", fib(n));
    return 0;
}