【leetcode】在既定时间做作业的学生人数

int busyStudent(int* startTime, int startTimeSize, int* endTime, int endTimeSize, int queryTime){
    int i, cnt = 0;
    for(i=0;i<startTimeSize;i++)
        cnt += queryTime >= startTime[i] && queryTime <= endTime[i];
    return cnt;
}