Discussion @ 1550. Dean's Pyramid 3 @ Timus Online Judge

jagatsastry WA with cout AC with printf [5] // Problem 1550. Dean's Pyramid 3 24 Nov 2007 01:28

This is terribly hilarious people. No precision details have been given in the question. Yet printf("%.5f",val); worked but cout<<val; didnt(WA#4).

BTW the method i followed is:
Find the volume of the pyramid vol(h,w)=hw*w/3 (i got it by integrating the squares at heights from 0 to h)
Find the volume of the truncated cylinder using the method given in
http://mathworld.wolfram.com/CylindricalSegment.html
subtract the second from the first.

Santa (Volgograd SU ) C++ and Java [4] // Problem 1550. Dean's Pyramid 3 24 Nov 2007 05:17

I couldnt accept this task in C++.

#include<iostream>
#include<math.h>
using namespace std;

int main()
{
   double w,h,x,y,r,t;
   cin >> w >> h >> x >> y >> r;
   x = fabs(x);
   y = fabs(y);
   if ( y > x ) x = y;
   printf("%.5lf", h * w * w / 3.0 - h * 3.14159265358979 * r * r * ( w/2 - x ) / (w/2));
   return 0;
}

take WA3, but analogical

import java.io.*;
import java.util.*;

public class Problem1550 {

/**
* @param args
*/
public static void main(String[] args)
throws IOException
{
Scanner in=new Scanner(System.in);
//Scanner in=new Scanner(new File("input.txt"));
PrintWriter out=new PrintWriter(System.out);
double h,w,x,y,r;
h=in.nextDouble();
w=in.nextDouble();
x=in.nextDouble();
y=in.nextDouble();
r=in.nextDouble();
x=Math.abs(x);
y=Math.abs(y);
if(y>x)x=y;
w=h*w*w/3-(Math.PI*r*r*(h*(w/2-x)/(w/2)));
out.println(Double.toString(w));
out.flush();
}
}

in Java - accepted. I hate this problem!

vav Re: C++ and Java // Problem 1550. Dean's Pyramid 3 9 Apr 2008 21:08

there is mistake in c++ code

Edited by author 09.04.2008 21:14

SHY Re: C++ and Java // Problem 1550. Dean's Pyramid 3 9 Apr 2008 21:12

Here is a very fool mistake in C++ code but Java code is alright. I made this mistake in my Pascal code but then i read the problem attentively and found it.

Oleg Strekalovsky [Vologda SPU] Re: C++ and Java // Problem 1550. Dean's Pyramid 3 11 May 2009 21:51

Santa (Volgograd SU ) wrote 24 November 2007 05:17

import java.io.*;
import java.util.*;

public class Problem1550 {

/**
* @param args
*/
public static void main(String[] args)
throws IOException
{
Scanner in=new Scanner(System.in);
//Scanner in=new Scanner(new File("input.txt"));
PrintWriter out=new PrintWriter(System.out);
double h,w,x,y,r;
h=in.nextDouble();
w=in.nextDouble();
x=in.nextDouble();
y=in.nextDouble();
r=in.nextDouble();
x=Math.abs(x);
y=Math.abs(y);
if(y>x)x=y;
w=h*w*w/3-(Math.PI*r*r*(h*(w/2-x)/(w/2)));
out.println(Double.toString(w));
out.flush();
}
}

Your solution is not right.
I use
out.printf(Locale.US,"%.4f",(piramideVolume-cylindricalSegmentVolume));

to get AC!

198808xc Re: C++ and Java // Problem 1550. Dean's Pyramid 3 11 Oct 2010 15:25

In Santa's code above, change
cin>>w>>h
to
cin>>h>>w
will be OK.

That's really a small but serious bug.

Santa (Volgograd SU ) WA3 - have you some tests? Is this formula right? // Problem 1550. Dean's Pyramid 3 12 Nov 2007 01:53

Caesar_KZ HELP [5] // Problem 1550. Dean's Pyramid 3 21 Apr 2007 13:59

tikka WA #7 // Problem 1550. Dean's Pyramid 3 11 Oct 2007 03:07

AB&B Need prompting!! [1] // Problem 1550. Dean's Pyramid 3 26 Apr 2007 02:19

Bogdan A. Stoica [fireatmyself] admins or other students [2] // Problem 1550. Dean's Pyramid 3 29 May 2007 19:19

Caesar_KZ TEST DATA // Problem 1550. Dean's Pyramid 3 21 Apr 2007 16:41

Discussion of Problem 1550. Dean's Pyramid 3