ZOJ-3191

下午狂刷水题。。收工吃饭了

#include<stdio.h>int main(){    int n;    while (scanf("%d", &n), n != -1)    {        if (n % 30 == 0)            printf("Exactly %d o\'clock\n",                   3 - n / 30 < 0 ? 15 - n / 30 : 3 - n / 30);        else        {            int i, j;            i = n / 30;            j = n / 30 + 1;            i = 3 - i < 0 ? 15 - i : 3 - i;            j = 3 - j < 0 ? 15 - j : 3 - j;            printf("Between %d o\'clock and %d o\'clock\n", j, i);        }    }    return 0;}