Submission

Score: 100

User: I_am_me

Problemset: Fibonacci Croissant

Language: c

Time: 0.002 second

Submitted On: 2025-10-12 14:34:42

#include <stdio.h>

int main() {
    int n;
    scanf("%d",&n);
    long long sum = 2;
    long long a = 1, b = 1 ;
    for(int i = 2;i<n;i++) {
        long long c = a+b;
        sum += c;
        a=b;
        b = c;
    }
    printf("%lld",sum) ;
    return 0;
}