Обсуждение @ 1526. Martian Plates @ Timus Online Judge

Yermak First test doesn't fit the statement limitations! (+) [6] // Задача 1526. Martian Plates 11 авг 2012 20:38

#include <stdio.h>
int p,t,n,m;
int main()
{
    scanf("%d%d%d%d",&p,&t,&n,&m);
    if (p<2 || p>10000 || t<2 || t>200 || (t&1) || n<1 || n>10 || m<1 || m>100)
        return 1/(p-p);
    return 0;
}

This program gets "Crash (integer division by zero)" at test #1.
http://acm.timus.ru/status.aspx?space=1&num=1526

Sandro (USU) Re: First test doesn't fit the statement limitations! (+) [5] // Задача 1526. Martian Plates 12 авг 2012 13:08

You are right, m = 0 in the 1st test. This limitation in the problem statement is fixed now.

Andrew Sboev [USU] Re: First test doesn't fit the statement limitations! (+) [4] // Задача 1526. Martian Plates 12 авг 2012 16:06

But there is a division by zero in his code! Sandro, why did you delete my post?

Sandro (USU) Re: First test doesn't fit the statement limitations! (+) [3] // Задача 1526. Martian Plates 13 авг 2012 01:34

Because the solution of Yermak is a input validator. If the system verdict on some test is Crash (division by zero), then this test is incorrect. If the test is correct, system verdict should be Wrong Answer.

Andrew Sboev [USU] Re: First test doesn't fit the statement limitations! (+) [2] // Задача 1526. Martian Plates 13 авг 2012 11:54

Sandro, look at this line of his code! There is a division by zero if condition is true, because p-p = 0!

if (p<2 || p>10000 || t<2 || t>200 || (t&1) || n<1 || n>10 || m<1 || m>100)
return 1/(p-p);

Edited by author 13.08.2012 11:55

Noob Re: First test doesn't fit the statement limitations! (+) [1] // Задача 1526. Martian Plates 13 авг 2012 22:43

Captain Obvious to the rescue!

Andrew Sboev [USU] Re: First test doesn't fit the statement limitations! (+) // Задача 1526. Martian Plates 14 авг 2012 00:03

Noob, oh, i understand.

Edited by author 14.08.2012 00:04

Обсуждение задачи 1526. Martian Plates