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11565 - Simple Equations

Posted: Sun Dec 28, 2008 9:11 am
by Obaida
Some one please help me I got so many WA in the contest and getting WA till now.
Here is my code.

Code: Select all

removed

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 9:45 am
by Igor9669
Read the statement more carefully ....
And you will find your bug!!!

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 9:57 am
by Obaida
Are you aiming for that???
If there are many possible answers, choose the one with the least value of x. If there is a tie, output the one with the least value of y.
But i can't find any difference between it and my solution. :oops:

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 10:20 am
by Igor9669
No, try this test:
3 1 3
Right answer is: No solution!

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 10:46 am
by Obaida
But now check this. It's also WA.

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removed

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 11:01 am
by Igor9669
I think this test will help you:
1 120 245
Answer is: -10 -1 12

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 11:04 am
by Obaida
Thank you very much i got the idea now. :)

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 7:02 pm
by kbr_iut
thanx..Articuno

Re: 11565 Simple Equations WA!!!

Posted: Sun Dec 28, 2008 8:44 pm
by Articuno
The reason is described in the first line of the problem descryption. :D
We have three different integers, x, y and z,

Re: 11565 - Simple Equations

Posted: Tue Dec 30, 2008 9:18 pm
by kbr_iut
sorry about my wrong input.

Re: 11565 - Simple Equations

Posted: Tue Dec 30, 2008 9:28 pm
by Igor9669
input is not right!

Re: 11565 - Simple Equations

Posted: Wed Dec 31, 2008 12:23 am
by kbr_iut
edited

Re: 11565 - Simple Equations

Posted: Wed Dec 31, 2008 11:48 am
by Articuno
I dont understand what you want to say, If you are asking about inputs>10000 and <1 then this should not be a concern. The problem descryption defines that all inputs will be within that range.

Re: 11565 - Simple Equations

Posted: Sat Jan 03, 2009 5:49 am
by Observer
Artincuno is right. The input numbers are all in the specified range. In fact the largest number in the input file is a bit less than 10000.

Re: 11565 - Simple Equations

Posted: Tue Jan 13, 2009 9:30 pm
by kbr_iut
I am sorry for my previous wrong input.
anyway I got AC in O(n^2) solution.
but I am getting WA in O(n) solution...pliz anyone help.
code:

Code: Select all


#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
using namespace std;
int valy,valz,valx,x,y,z,a,b,c,u,v,m,n,t;
bool flag;
#define inf 32767
int cal(){
   int beg,end;
   beg=-b;
   while(beg<=b){
      int i=beg;
      v=2*i*i*i-2*a*i*i+a*a*i-c*i-2*b;
      if(!v&&i)return i;
      beg++;
   }
   return inf;
}
void fun(){
	  m=-m;
      valy=(m+a-valx)/2;
      if(valy==inf||valy==0||valy==valx)return;
      valz=b/(valx*valy);
      if(valz==inf||valz==0||valz==valx||valz==valy)return;
	  if(valx*valx+valy*valy+valz*valz!=c||valx*valy*valz!=b||valx+valy+valz!=a)return;
	  int y=max(valx,valy);
	  int x=valx+valy-y;
	  int z=a-x-y;
	  if(z>y)valx=x,valy=y,valz=z;
	  else if(z>x)valx=x,valy=z,valz=y;
	  else valx=z,valy=x,valz=y;
	  flag=true;
}
int main(){
   int i,j,k,l;
#ifndef OINLINE_JUDGE
   freopen("1.txt","r",stdin);
   freopen("out.txt","w",stdout);
#endif
   scanf("%d",&t);
   while(t--){
      scanf("%d%d%d",&a,&b,&c);
      valx=cal();
	  if(valx==inf){printf("No solution.\n");continue;}
      m=c-valx*valx-2*(b/valx);
      m=sqrt(double(m))+.5;
	  flag=false;
	  fun();
	  if(!flag)fun();
	  if(flag)printf("%d %d %d\n",valx,valy,valz);
	  else printf("No solution.\n");
   }
   return 0;
}




Is there any wrong finding the value of x , y? Is my equation right?


sample input:

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29
3 1 3
3 3 3
1 8 21
17 108 121

10 0 100

47 240 1637

18 0 162

23 385 195

37 1664 489

17 0 145

44 544 1224

42 0 1394

24 0 386

12 24 74

8 0 40

55 629 1659

60 1410 2318

34 836 498

46 980 1290

19 56 213

11 48 41

57 3468 1481

52 2210 1350




8 0 130
0 30 38
0 30 38
1 4 9
5 0 13
3 0 5



sample output:

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No solution.
No solution.
-2 -1 4
2 6 9
No solution.
1 6 40
No solution.
5 7 11
8 13 16
No solution.
2 8 34
No solution.
No solution.
1 3 8
No solution.
1 17 37
3 10 47
4 11 19
4 7 35
1 4 14
No solution.
6 17 34
5 13 34
No solution.
-3 -2 5
-3 -2 5
No solution.
No solution.
No solution.