Time Zone

Time Zone

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2049    Accepted Submission(s): 636

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

 

 

这题看起来不难，但是精度问题挺烦人的．

 

#include <iostream>
using namespace std;
int n;
int main(){
    scanf("%d",&n);
    int x,y;
    double z;
    char s[4];
    while(n--){
        scanf("%d%d%c%c%c%c%lf",&x,&y,&s[0],&s[1],&s[2],&s[3],&z);
        if(s[3]=='-'){
            z = -z;
        }
        double k = (z-8.0)*60.0;
        k += k>0?0.5:-0.5;
        int ans = (int)(k);
        ans +=(x*60+y);
        ans = (ans+1440)%1440;
        int xn = (ans/60)%24;
        int yn = ans%60;
        printf("%02d:%02d
",xn,yn);
    }
    return 0;
}