打印日期

#include <iostream>
#include <cstdio>
 using namespace std;
 int dayTab[2][13]={
     {0,31,28,31,30,31,30,31,31,30,31,30,31},
     {0,31,29,31,30,31,30,31,31,30,31,30,31}
 };

bool IsLeapYear(int year){            //是否为闰年
    return (year%4==0&&year%100!=0 )||(year%400==0);
}

int main(){
    int year,month,day;
    int number=0;
    while(scanf("%d%d",&year,&number)!=EOF){
        month=0;
        int row=IsLeapYear(year);
        while(number>dayTab[row][month]){          //用number来递减确定确定月份
            number-=dayTab[row][month];
            month++;
        }
        day=number;                //不足月剩下的number确定日
        printf("%04d-%02d-%02d\n",year,month,day);
    }
    return 0;
}