10297 - Beavergnaw

[nerocrux]

Maybe I'm not understand the problem thoroughly but I don't know how to caolculate the volumn of 2 cones.Does the cylinder in the center of "D"?

THX...

[Ghost77 dimen]

Try calculus. It's an easy problem.

Good luck.

[Larry]

You can also use binary search..

[nerocrux]

i see,i'll try,thank u guys!!

[nerocrux]

I still cant figur out the formula for this problem.Can anyone give me some hints??THX a lot !!

[Frostina]

the volumn of 2 cones can be calculated by this formula..

1/3 * pi * r * r * h

r of the circle of its bottom

h is the height of the cone

[bonny]

The formula is:

d=(D^3-6*V/pi)^1/3

(but i'm still getting WA )

[mukit]

I don't see any reason of getting W.A.
I used double and solved the problem.

[Obaida]

For every one getting WA...
Check this point..

Code: Select all

pi=2*acos(0.0)

Hope this will solve the problem.

[lnr]

Hello,
Can anyone give some hint for this problem?
volume=1/3*(D/2)^2*D

[avatar]

though the following algorithm is long .but hope it may help u ,as it work fine
1.First find total volume (using the given diameter /height)
2.remaining volume=Total volume - eaten volume
3. then consider the two conic having the base of given D
4.then last remaining volume=(small solid cylinder in the middle-2*small cone)
5. from that find the asked d
best of luck...................

[leo13]

while submitting my code in ANSI C 4.8.2 language i was getting wrong answer but when i submitted the same code in C++ 4.8.2 language i got accepted..... i am not understanding what differences have been created by changing the submission language.... please help... thanks in advance..here is my code :

Code: Select all

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#define pi acos(-1)
int main()
{
    double d,v,voc,vbc,ar,dic;
    while(scanf("%lf%lf",&d,&v)==2)
    {
        if(d==0&&v==0)break;
        voc=pi*(d/2.0)*(d/2.0)*d;
        vbc=2*(1/3.0)*pi*(d/2.0)*(d/2.0)*(d/2.0);
        ar=(voc-vbc)-v;
        dic=cbrt((6*ar)/pi);
        printf("%.3lf\n",dic);
    }
    return 0;
}

[lighted]

Post in existing thread, use search by problem number (10297).

I think problem is in cbrt function of ANSI C 4.8.2 - GNU C Compiler's library. When you change cbrt to pow judge gives accepted in ANSI C.

Code: Select all

dic = pow(6 * ar / pi, 1.0 / 3);

[brianfry713]

Yes, cbrt() is not part of ANSI C, it is returning 1.0 with any argument.