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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. /* Name of the class has to be "Main" only if the class is public. */
  6. class Codechef
  7. {
  8.     static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  9.     static int n,m,flag;
  10.     static int arr[][];
  11.     public static boolean chk(int x,int y)
  12.     {
  13.         if(x>=1 && x<=n && y>=1 && y<=m)
  14.         return true;
  15.  
  16.         return false;
  17.     }
  18.     public static void print (int arr[][],int cx,int cy)
  19.     {
  20.         int i,j;
  21.         for(i=1;i<=n;i++)
  22.         {
  23.             for(j=1;j<=m;j++)
  24.             System.out.print(arr[i][j]);
  25.  
  26.             System.out.println();
  27.         }
  28.         System.out.print(cx+"  "+cy);
  29.         System.out.println();
  30.     }
  31.  
  32.     public static void cal(int cx,int cy,int dx,int dy)
  33.     {
  34.         if(flag==0){
  35.  
  36.             arr[cx][cy]=1;
  37.             if(cx==dx && cy==dy)
  38.             {
  39.                 flag=1;
  40.                 if(chk(cx,cy+1)==true && arr[cx][cy+1]==0) 
  41.                 {System.out.println("Right");return;}
  42.  
  43.                 if(chk(cx,cy-1)==true && arr[cx][cy-1]==0) 
  44.                 {System.out.println("Left");return;}
  45.  
  46.                 if(chk(cx-1,cy)==true && arr[cx-1][cy]==0) 
  47.                 {System.out.println("Front");return;}
  48.  
  49.                 if(chk(cx+1,cy)==true && arr[cx+1][cy]==0) 
  50.                 {System.out.println("Back");return;}
  51.  
  52.                 System.out.println("Over");return;
  53.  
  54.             }
  55.             else
  56.             {
  57.                 if(chk(cx,cy+1)==true && arr[cx][cy+1]==0) 
  58.                 {
  59.                     cal(cx,cy+1,dx,dy);
  60.                 }
  61.                 if(chk(cx,cy-1)==true && arr[cx][cy-1]==0) 
  62.                 {
  63.                     cal(cx,cy-1,dx,dy);
  64.                 }
  65.                 if(chk(cx-1,cy)==true && arr[cx-1][cy]==0) 
  66.                 {
  67.                     cal(cx-1,cy,dx,dy);
  68.                 }
  69.                 if(chk(cx+1,cy)==true && arr[cx+1][cy]==0) 
  70.                 {
  71.                     cal(cx+1,cy,dx,dy);
  72.                 }
  73.             }
  74.         }
  75.  
  76.  
  77.     }
  78.     public static void main () throws java.lang.Exception
  79.     {
  80.         // your code goes here
  81.         System.out.println("ee");
  82.         int t = Integer.parseInt(br.readLine());
  83.         for(;t!=0;t--)
  84.         {
  85.             int sx,sy,dx,dy;
  86.             StringTokenizer st = new StringTokenizer(br.readLine());
  87.             n=Integer.parseInt(st.nextToken());
  88.             m=Integer.parseInt(st.nextToken());
  89.  
  90.             st = new StringTokenizer(br.readLine());
  91.             sx=Integer.parseInt(st.nextToken());
  92.             sy=Integer.parseInt(st.nextToken());
  93.  
  94.             st = new StringTokenizer(br.readLine());
  95.             dx=Integer.parseInt(st.nextToken());
  96.             dy=Integer.parseInt(st.nextToken());
  97.  
  98.             arr= new int[1001][1001];
  99.             flag=0;
  100.             cal(sx,sy,dx,dy);
  101.         }
  102.     }
  103. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
spoj: The program compiled successfully, but main class was not found.
      Main class should contain method: public static void main (String[] args).
stdout
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Standard output is empty
https://ideone.com/wXlLIm
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
secret

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