579 - Clock Hands

[saiful_islam]

ok

[Dark Lord]

Your code is giving these output.
input:
1:59
1:01
your output:
-0.000
-36893488.....something.
But the output should be:
65.500
24.500
Try to use fabs function from math.h
and visit this page http://en.wikipedia.org/wiki/Clock_angle_problem
remember angle is always <=180.000

[saiful_islam]

tnx Bro ACC

[20112685]

I don't know why I get WA though I have check many inputs and outputs.Please help me,thanks in advance!
#include<stdio.h>
#include<math.h>
int main(void)
{
int h,m;
double a;
while(scanf("%i:%i",&h,&m)!=EOF && (h||m))
{
a=fabs(5.5*m-30*h);
if(a-180>1e-9)
a=360-a;
printf("%.3f\n",a);
}
return 0;
}

[AT-2012]

Plz!! Someone help me out wid this code. I got WA.
579: Code


#include<stdio.h>
#include<math.h>
int main()
{
float h,m,ang,n;
while(scanf("%f:%f",&h,&m)==2)
{
if(h==0 && m==0) break;
ang=((h*60+m)/2-(m*6));
if(ang>180) ang=360-ang;
if(ang<0) ang=fabs(ang);
printf("%.3f\n",ang);
}
return 0;
}

[brianfry713]

Use double instead of float.

[shellexecutor]

Float is OK. I use float and got AC.

[moxlotus]

The java code is getting TLE, can someone tell me how can this piece of code be optimized ?

The equivalent C code has passed the judge without any problem.

Thanks in advance.

Code: Select all

import java.util.*;
import java.text.DecimalFormat;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class ClockHands
{
	public static void main(String[] args) throws IOException
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = br.readLine();
		String[] arr = line.split("[:\\s]+");
		int hr = Integer.parseInt(arr[0]);
		int min= Integer.parseInt(arr[1]);
		double hrDegree, minDegree, diff;
		DecimalFormat df = new DecimalFormat("0.000");
		while(hr > 0 || min > 0)
		{
			if(hr == 12) hr = 0;
			hrDegree = ((hr+(min/60.0))/12.0) * 360;
			minDegree = (min/60.0) * 360;
			diff = hrDegree > minDegree ? hrDegree-minDegree : minDegree-hrDegree;
			if(diff > 180) diff = 360 - diff;	
			System.out.printf("%s\n", df.format(diff));
			
			line = br.readLine();
			arr = line.split("[:\\s]+");
			hr = Integer.parseInt(arr[0]);
			min = Integer.parseInt(arr[1]);
		}
	}
}

[brianfry713]

Use Class Main. Java is too slow for some problems.

[moxlotus]

Actually got a few friends helped me optimized the code.
Apparently the use of StringBuilder and printing it out all at once is much faster than calling System.out.printf.
The performance gain is more than 100%

[brianfry713]

You could also try BufferedWriter.

[cyberdragon]

3rd case in the sample input.
How 8:10 outputs 175, It should be 180 ?

[brianfry713]

The big hand at 10 is 60 degrees to the right of 12.
The small hand at 8:10 is 115 degrees to the left of 12.

[This Is ERFAN]

Getting WA...plz help me out.

Code: Select all

#include<stdio.h>

int main()
{
    float a,b;
    char c;
    while(scanf("%f %c %f",&a,&c,&b)==3)
    {
        if(a==0&&b==0) return 0;
        float d,d1,d2,d3;
        if(b==0)
        {
            if(a<=6) d=a*5*6;
            else
                d=(12-a)*5*6;
        }
        else
        {
            d1=b/2;
            d2=b/5;
            if(a==d2) d3=0;
            else if(a>d2) d3=(a-d2)*5*6;
            else if(a<d2) d3=(d2-a)*5*6;

            if(a>d2) d=d3+d1;
            else if(a==d2) d=d1;
            else d=d3-d1;
            if(d>180) d=360-d;
        }

        printf("%0.3f\n",d);

    }
    return 0;
}

[brianfry713]

Try using double instead of float.