Submission

Score: 50

User: Chawin

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-08 22:41:59

#include <stdio.h>

int fibonacci(int n){              
    if (n <= 1) return n;          
    int a = 0, b = 1, c;           
    for (int i = 2; i <= n; i++){  
        c = a + b;                 
        a = b;                     
        b = c;                     
    }
    return b;
}

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

    return 0;
}