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

*/

巴特西

HDU 多校对抗赛 J Time Zone

Time Zone

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