#include <stdio.h>
#include <stdlib.h>
int main(){
    int stuNum=0;
    int remainder=-1;
    int weekNum=0;
    printf("请输入学号（1420110001，142015000）:\n");
    scanf("%d",&stuNum);
    if((stuNum>=142011001)&&(stuNum<=142015000)){
        printf("请输入周数:\n");
        scanf ("%d",&weekNum);
    if((weekNum>=1)&&(weekNum<=20))
        remainder=stuNum %10;
    if(remainder%3==weekNum%3)
        printf("学生%d在第%d周应该交作业吗?是\n");
    }
    else
        printf("学生%d在第%d周应该交作业吗?否\n");
    return 0;
    }