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### 11677 - Alarm Clock

Posted: Tue Nov 10, 2009 5:08 pm
Help me!
i am getting wrong answer for that problem.Dont know why?
Can any one give me some critical input?

### 11677 ways to improve timing

Posted: Wed Feb 10, 2010 8:00 am
Hi,

Following is the code:

Code: Select all

``````  3 int main()
4 {
6         int h1;
7         int h2;
8         int m1;
9         int m2;
10
11         scanf("%d %d %d %d", &h1, &m1, &h2, &m2);
12         while (h1 != 0 || h2 != 0 || m1 != 0 || m2 != 0)
13         {
14                 //int current_time = h1*60+m1;
15                 //int alarm_time = h2*60+m2;
16
17                 //if (h2 < h1 || (h2 == h1 && m2 < m1))
18                 //{
19                 //      h2 += 24;
20                 //}
21
22                 //if (m2 < m1)
23                 //{
24                 //      m2 += 60;
25                 //      h2--;
26                 //}
27                 int d_m = m2 - m1;
28                 int d_h = h2 - h1;
29                 int d_t = d_h*60+d_m;
30                 if (d_t < 0)
31                 {
33                 }
34                 printf("%d\n",d_t);
35                 scanf("%d %d %d %d", &h1, &m1, &h2, &m2);
36         }
37         return 0;
38 }
``````
The timing is coming out as 0.004. As you can see I just used 2 subtractions to calculated difference and 1 multiplication to convert into minutes. I guess this is the minimum number of operations required. And also I precomputed the pad (=24*60) to avoid recomputation. Then why is it showing 0.004 instead of 0.000? I can't imagine any further way to eliminate any operations.

### Re: 11677: Alarm Clock

Posted: Sat Jun 19, 2010 12:00 pm
/***************************************************/
E-mail: gigabyte_yeasin@yahoo.com
University of Science & Technology Chittagong (USTC)
CSE- 11th Batch
/***************************************************/
Input:

1 1 1 1
0 1 1 0
1 1 2 2
2 2 1 1
3 15 3 10
3 15 2 15
1 5 3 5
23 59 0 34
21 33 21 10
0 0 0 0

Output:

0
59
61
1379
1435
1380
120
35
1417

### Re: 11677: Alarm Clock

Posted: Thu Jul 01, 2010 10:00 pm
try this:-
input:-
5 3 2 1
3 2 1 1
1 6 1 5
Output will be:-
1258
1319
1439

best of luck

### Re: 11677 ways to improve timing

Posted: Thu Aug 12, 2010 10:28 am
Bro please remove ur code... It may b harmful for Other user's....

Everyone should Think differently...Thus we may make a Difference....

### Re: 11677 ways to improve timing

Posted: Fri Aug 13, 2010 12:56 pm
you are absolutely right Shawon...

### Re: 11677: Alarm Clock

Posted: Sat Sep 11, 2010 1:28 am
My code is ok for all the inputs above, and i'm getting wrong answer. I'm not using system("pause") in my code but it's not being accepted.

### WA in Problem - 11677

Posted: Wed Oct 10, 2012 8:01 pm
I don't understand what is the wrong in my code. I can't fix the problem. Hope someone can give the accurate reason that's why I got WA.
Here is my code:

Code: Select all

``code removed after AC``

### Re: WA in Problem - 11677

Posted: Fri Oct 12, 2012 11:49 pm
Try input 0 5 1 5

### Re: WA in Problem - 11677

Posted: Sat Oct 13, 2012 2:51 pm
thank you for your reply. Can you please tell me what will be the output for the input 0 5 1 5?
Is it 60?

### Re: WA in Problem - 11677

Posted: Sat Oct 13, 2012 4:25 pm
Can you provide me a few more sample input?

### Re: WA in Problem - 11677

Posted: Tue Oct 16, 2012 1:27 am
Yes the output for 0 5 1 5 should be 60. You can generate your own test cases at:
http://www.uvatoolkit.com/problemssolve.php

### Re: WA in Problem - 11677

Posted: Tue Oct 16, 2012 10:35 am
Thanks, it is already got AC.

### P-11677what's wrong with my code. i got submissionErr

Posted: Mon Sep 16, 2013 10:57 pm
#include<stdio.h>

int main()
{
long int i,h1,m1,h2,m2,H,M,time;
for(i=1;;i++)
{
scanf("%ld %ld %ld %ld",&h1,&m1,&h2,&m2);
if(h1==0)
{
h1=24;
}
if(h2==0)
{
h2=24;
}
if(h1<h2&&m1<=m2)
{
H=h2-h1;
M=m2-m1;
time=H*60+M;
printf("%ld\n",time);
}
if(h1<h2&&m2<m1)
{
H=(h2-(h1+1));
M=m2+60-m1;
time=H*60+M;
printf("%ld\n",time);
}
if(h2<=h1&&m2<=m1)
{
H=(h2+24)*60+m2;
M=h1*60+m1;
time=H-M;
printf("%ld\n",time);
}
if(h2<h1&&m1<m2)
{
H=h2+24-h1;
M=m2-m1;
time=H*60+M;
printf("%ld\n",time);
}
}
return 0;
}

### Re: P-11677what's wrong with my code. i got submissionErr

Posted: Mon Sep 16, 2013 11:09 pm