fork download
copy 
  1.  
  2. // @Author - Himanshu Dagar on 18 June 2014
  3. // Program of competitive programming
  4. import java.io.*;
  5. import java.lang.System.*;
  6. import java.util.*;
  7.  
  8. public class Main {
  9.  
  10.  
  11.  
  12.     public static void main(String[] args) throws IOException {
  13.  
  14.         Scanner sc = new Scanner(System.in);
  15.         int T;
  16.         for (T = sc.nextInt(); T != 0; T--) {
  17.             int N;
  18.             N = sc.nextInt();
  19.             Reader ob = new Reader();
  20.             Map<Character, Character> hm= new HashMap<>();
  21.             boolean b=false;
  22.             for (; N != 0; N--) {
  23.                 ob.Read();
  24.                 char c = ob.c;
  25.                 char p = ob.p;
  26.                 hm.put(c, p);
  27.                 b=true;
  28.             }
  29.            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  30.            String userName = br.readLine();
  31.            if(b==true){
  32.            char[] ch=userName.toCharArray();
  33.            for(int i=0,len=ch.length;i<len;i++){
  34.                char ch1=ch[i];
  35.                if(hm.get(ch1)!=null)
  36.                   ch[i]=hm.get(ch1);
  37.            }
  38.             userName=String.valueOf(ch);
  39.            }
  40.           String W=Real_password(userName);  
  41.           System.out.println(W); 
  42.         }
  43.    }
  44.  
  45.  
  46.  
  47.  
  48.         static String Real_password(String S)
  49.     {
  50.       char[] str=S.toCharArray();
  51.        int Start=0;
  52.        int End=S.length()-1;
  53.       while(str[Start]=='0')
  54.          Start++;
  55.       int pos=S.indexOf('.');
  56.       if(pos!=-1)
  57.       {
  58.         while(str[End]=='0')
  59.             End--;
  60.       }
  61.       if(str[End]=='.')
  62.           End--;
  63.       S=String.valueOf(str);
  64.       return(S.substring(Start,End+1));
  65.    }
  66.  
  67. }
  68.  
  69.  
  70.  
  71. class Reader {
  72.  
  73.     char c, p;
  74.     char ch;
  75.  
  76.     public void Read() throws IOException {
  77.         c = (char) System.in.read();
  78.         ch = (char) System.in.read();
  79.         p = (char) System.in.read();
  80.         ch = (char) System.in.read();
  81.     }
  82. }
  83.  
Runtime error #stdin #stdout #stderr 0.1s 381760KB
comments (?)
stdin
copy 
1
0
1
stdout
copy 
Standard output is empty
stderr
copy 
Exception in thread "main" java.lang.NullPointerException
	at Main.Real_password(Main.java:50)
	at Main.main(Main.java:40)
https://ideone.com/oh2Osj
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!