Submission

Score: 100

User: Some1258

Problemset: อนุกรม

Language: c

Time: 0.002 second

Submitted On: 2025-10-13 21:50:28

#include <stdio.h>

int main() {
    long long num;
    scanf("%lld", &num);

    if (num <= 0) {
        printf("Invalid input");
        return 0;
    }

    long long arr[num];
    arr[0] = 1;
    if (num > 1) arr[1] = 1;

    for (long long i = 2; i < num; i++) {
        arr[i] = arr[i - 1] + arr[i - 2];
    }

    printf("%lld", arr[num - 1]);
    return 0;
}