Submission

Score: 100

User: purihorharin

Problemset: อนุกรม

Language: c

Time: 0.001 second

Submitted On: 2026-03-20 17:08:54

#include <stdio.h>

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