Please help me with TEST

[touches]

Hello i am a newbie here. I started off with the Life problem and this is the code i wrote

class Test1
{
 public static void main(String[] args) throws java.io.IOException
{
  int i;
System.out.println(" enter any");
 do{
       ch=System.in.read();
}while(i!=42);
}
}

when i run this code it doesnt seem to stop... whereas when i try with chars it works well when for example i want to stop when i hit 'q'. have i done anythin wrong here?? please help

[TripleM_sof]

a) Your output needs to match the judge's output exactly, so your method will never give the right answer anyway since you are printing out ' enter any' which isn't part of the correct output.

b) Your solution doesn't even compile. You are using a variable ch without declaring it anywhere.

c) Assuming you mean ch to be i or vice versa, System.in reads in bytes, not characters from the input: java.sun.com/javase/6/docs/api/j ... html#read(

Typing in 2 then pressing enter will cause ch to be equal to 50, then 13, then 10 (at least on windows).

You'll need to use a BufferedReader instead to read characters from the input.

[touches]

import java.io.*;
class Test1
{
 public static void main(String[] args) throws java.io.IOException
{
  int m;
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println(" Input :");
do{
 m= Integer.parseInt(bf.readLine());
}while(m!=42);
}
}

Well i followed your advice and changed the code. When i submit it i get the result as wrong answer even though it stops taking integers if we hit 42.. Please what could be wrong here any help

[ruczhangxy]

[quote="touches"]

import java.io.*;
class Test1
{
 public static void main(String[] args) throws java.io.IOException
{
  int m;
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println(" Input :");
do{
 m= Integer.parseInt(bf.readLine());
}while(m!=42);
}
}

Well i followed your advice and changed the code. When i submit it i get the result as wrong answer even though it stops taking integers if we hit 42.. Please what could be wrong here any help[/quote]

First, you should not output the string "input :".
Second, you have to output the number you read in that is not 42.

[system]

[quote="touches"]

import java.io.*;
class Test1
{
 public static void main(String[] args) throws java.io.IOException
{
  int m;
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println(" Input :");
do{
 m= Integer.parseInt(bf.readLine());
}while(m!=42);
}
}

Well i followed your advice and changed the code. When i submit it i get the result as wrong answer even though it stops taking integers if we hit 42.. Please what could be wrong here any help[/quote]

As far as I knew, the public class name must be exactly "Main"....

you should not print even a single character other than the problem statement says,
and try like this:

keep reading 1 integer from input:
    if it is 42 then terminate
    else print it

hope this helps

[touches]

Thanks for your suggestion but my problem is i compile the code in my pc before submitting.. I change the class name to main and that is not a problem.. I get the output like this
2
33
21
36
88
42

After 42 the execution stops as per the problem requirements.. but still i keep getting wrong answer as my result. I even removed the code that ouputs the String: "input: " and tried . Now what more should i do???? Btw i see in the sample input for the proble that there is 99 after 42 i dont understand that part???

[ruczhangxy]

Thanks for your suggestion but my problem is i compile the code in my pc before submitting.. I change the class name to main and that is not a problem.. I get the output like this
2
33
21
36
88
42

After 42 the execution stops as per the problem requirements.. but still i keep getting wrong answer as my result. I even removed the code that ouputs the String: "input: " and tried . Now what more should i do????

42 is not supposed to be printed. Your code should stop printing when 42 comes, without printing 42.

[system]

Thanks for your suggestion but my problem is i compile the code in my pc before submitting.. I change the class name to main and that is not a problem.. I get the output like this
2
33
21
36
88
42

After 42 the execution stops as per the problem requirements.. but still i keep getting wrong answer as my result. I even removed the code that ouputs the String: "input: " and tried . Now what more should i do???? Btw i see in the sample input for the proble that there is 99 after 42 i dont understand that part???

How do you get these output with your code? you even don't print anything (I don't see any System.out.println() in your do while loop..!!!, may be you posted a wrong code here.

as this is a very starting problem, and You said you have no previous experience.. you may like to have a look at this code:

import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException {
        int n;
        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
        while(true) {
            n = Integer.parseInt(stdin.readLine());
            if(n==42) break;
            System.out.println(n);
        }
    }
}

[touches]

@hasan

I have posted the code above and i have modified the code. Is this correct??

import java.io.*;
class Test1
{
 public static void main(String[] args) throws java.io.IOException
{
  int m=0;
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
do{
 m= Integer.parseInt(bf.readLine());
  System.out.println();
if(m==42)
{ 
 System.exit(0); 
}else
{
 System.out.println("" +m);
}
}while(m!=42);
}
}

this is the code i have written and about to submit

[system]

@hasan

I have posted the code above and i have modified the code. Is this correct??
[code]import java.io.*;
class Test1
{
public static void main(String[] args) throws java.io.IOException
{
int m=0;
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
do{
m= Integer.parseInt(bf.readLine());
System.out.println();
if(m==42)
{
System.exit(0);
}else
{
System.out.println("" +m);
}

}while(m!=42);
}
}[/code]
this is the code i have written and about to submit

Nearly correct, except the System.out.println after the readLine() command, it should not be there
and also, no need to do println("" + m), just println(m) is enough, they are same.

[touches]

thanks a lot for all your help the solution was accepted!!!!!!

[narbej]

Też mam tak samo.

[Ostry_sof]

były skonstruowane w ten sposób, że myszka mogła poruszać się tylko w jednym, wyznaczonym kierunku. Prowadziły zawsze do przodu, zbaczając czasem w lewo lub w prawo.

Dla mnie pierwsze zdanie mówi, że graf jest skierowany, a drugie, że nie ma cykli. Jeżeli cykle są, to treść jawnie sugeruje co innego. Niemniej sortowanie topologiczne kończyło się poprawnie i cyklu mi nie wykrywał. Rzeczywiście warunek nieprzecinania się korytarzy mógł powodować inną odpowiedź u Ciebie niż u mnie (być może ten ostatni test z 50 wierzchołkami nie jest zgodny ze specyfikacją wejścia). Nie tłumaczy to jednak WA gdyż mój algorytm działa na dowolnym DAGu. Może spróbuję jakiegoś prostszego podejścia, a te z minimalnym przepływem jest zbyt "odjechane". Może i ten nieszczęsny cykl gdzieś się zawieruszył.