[1271] Nth Day is Which Day

• [1271] Nth Day is Which Day

• http://ac.nbutoj.com/Problem/view.xhtml?id=1271
• 时间限制: 1000 ms　内存限制: 65535 K
• 问题描述
• The first day is 1 year 1 month 1 day, so the Nth day is which day?
• 输入
• Input until EOF.  Input a positive integer N means the Nth day(0<N<365000). 
• 输出
• You should output the date of that day(year month day). 
• 样例输入

• 1
  2
  32
  

• 样例输出

• 1 1 1
  1 1 2
  1 2 1
  

• 提示

• 无

• 来源

• hungar

 

#include<iostream>
#include<cstdio>
#include<cstring>

using namespace std;

int m1[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int m2[12]={31,29,31,30,31,30,31,31,30,31,30,31};

int main(){

    //freopen("input.txt","r",stdin);

    int n;
    while(~scanf("%d",&n)){
        int year=1,month=1,day=n,p=0;
        if(day%146097==0){    //400年的天数:400*365+97
            day--;
            p++;
        }
        year+=day/146097*400;
        day%=146097;

        if(day%36524==0){     //100年的天数:100*365+24
            day--;
            p++;
        }
        year+=day/36524*100;
        day%=36524;

        if(day%1461==0){      //4年的天数: 4*365+1
            day--;
            p++;
        }
        year+=day/1461*4;
        day%=1461;

        if(day%365==0){
            day--;
            p++;
        }
        year+=day/365*1;
        day%=365;

        int i=0;
        if(year%400==0 || (year%4==0 && year%100!=0)){
            while(day>m2[i]){
                month++;
                day-=m2[i];
                i++;
            }
        }else{
            while(day>m1[i]){
                month++;
                day-=m1[i];
                i++;
            }
        }
        day+=p;
        printf("%d %d %d\n",year,month,day);
    }
    return 0;
}