三天打鱼两天晒网

#include<stdio.h>


/**
*判断闰年 
*/
int isR(int year){
    if((year%4==0 || year%100==0)&&year%400!=0) {
        return 1;
    }
    return 0;
} 

/**
*如果参数合法，返回其至1990-01-01的时间长度
*否则返回0
*/
int isLegal(int year, int m, int day) {
    //对月份进行初始化
    int isr = isR(year); 
    int month[13]= {0,31,29,31,30,31,30,31,31,30,31,30,31};
    if(isr) {
        month[2]=28;
    }
    
    //逐一校验
    if(year < 1990) {
        return 0;
    }
    if(m<=0 || m>12) {
        return 0;
    }
    //日期合法性需要有月份来决定 
    switch(m) {
        case 1: case 5: case 3: case 7: case 8: case 10: case 12:
        if(day < 0 || day > 31){
            return 0;
        }
        case 2:
            if(isr == 1){
                if(day > 28 || day < 0){
                    return 0;
                }
            }else {
                if(day > 29 || day < 0){
                    return 0;
                }
            }
        default:
            if(day <0 || day > 30){
                return 0;
            }
    }
    
    int L=0;
    //遍历年 
    for(int i=1990; i<year; i++){
        if(isR(i)){
            L+=366; 
        }else{
            L+=365;
        }
    }
    //遍历月 
    for(int i=1; i<m; i++){
        L+=month[i];
    }
    //遍历日 
    L+=day;
    return L;
} 


int main() {
    int year, month, day;
    scanf("%4d-%2d-%2d", &year,&month,&day);
    int L=isLegal(year, month, day);
    if(L==0){
        puts("Invalid input");
    }else{
        int n=L%5;
        if(n>0 && n<=3){
            puts("He is working");
        }else{
            puts("He is having a rest");
        }
    }
    return 0;
}