题解 | #小乐乐排电梯#

#include <stdio.h>

int main() {
    int n, m;
    scanf("%d", &n);
    m = (n + 1) / 12;//
    if ((n + 1) % 12 > 0)//
        printf("%d", 4 * m  + 2);
    else if (m == 1)
        printf("2");
    else
        printf("%d", 4 * m + 2);
    return 0;
}