HDU 多校对抗赛 J Time Zone

Time Zone

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 495    Accepted Submission(s): 162

Problem Description

Chiaki often participates in international competitive programming contests. The time zone becomes a big problem.
Given a time in Beijing time (UTC +8), Chiaki would like to know the time in another time zone s.

 

Input

There are multiple test cases. The first line of input contains an integer T (1≤T≤106), indicating the number of test cases. For each test case:
The first line contains two integers a, b (0≤a≤23,0≤b≤59) and a string s in the format of "UTC+X'', "UTC-X'', "UTC+X.Y'', or "UTC-X.Y'' (0≤X,X.Y≤14,0≤Y≤9).

 

Output

For each test, output the time in the format of hh:mm (24-hour clock).

 

Sample Input

3
11 11 UTC+8
11 12 UTC+9
11 23 UTC+0

 

Sample Output

11:11
12:12
03:23

 

Source

2018 Multi-University Training Contest 1

 

 

题意：北京标准时间是UTC+8

现在给出标准的北京时间和别的地方的时区

要求别的地方的当前时间

模拟题：

注意细节：1 会有浮点误差，所以把小数位拿出来单独计算

　　　　　2注意当h小于0的时候，要转换成前一天的时间

　　　　　3是UTC-xy时，可以当成是当前时间+16-xy的时间

代码如下

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <cstring>
using namespace std;
int main(){
  int T;
  scanf("%d",&T);
 while(T--){
    int hh,mm;
    scanf("%d%d",&hh,&mm);
    char str[];
    scanf("%s",str);
    int len=strlen(str);
    int flag=;
    int th=;
    int tm=;
    if(str[]=='+'){
      for(int i=;i<len;i++){
        if(str[i]=='.'){
          flag=i;
          break;
        }
        th=th*+str[i]-'';
      }
      if(flag!=){
        tm=str[flag+]-'';
        mm+=((tm*)/);
        if(mm>=){
          mm-=;
          th++;
        }
      }
      hh+=(th-);
      if(hh>=) hh-=;
      if(hh<) hh+=;
      if(hh<) cout<<""; //前导零
      cout<<hh<<":";
      if(mm<) cout<<"";
      cout<<mm<<endl;
    }else {
      int tth=;
      int th=;
      for(int i=;i<len;i++){
        if(str[i]=='.'){
          flag=i;
          break;
        }
        tth=tth*+str[i]-'';
      }
      th-=tth;
      if(flag!=){
        tm=str[flag+]-'';
        mm-=((tm*)/);
        if(mm<){
          mm+=;
          th--;
        }
      }
      hh+=th;
      if(hh>=) hh-=;
      if(hh<) printf("");
      printf("%d:",hh);
      if(mm<) printf("");
      printf("%d\n",mm);
        }
  }
  return ;
}
/*
01 14 UTC+2.6
19:50
*/