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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. class HelloWorld
  5. {
  6.     void check(String s)
  7.     {   int l=s.length();
  8.         int i,j,K;
  9.         char ci,cf;
  10.         int h1;
  11.         int h2;
  12.         int fl=0;
  13.         if(l%2==0)
  14.         {
  15.             for(i=0;i<l/2;i++)
  16.             { ci=s.charAt(i);
  17.             h1=0;
  18.                 h2=0;
  19.                 for(K=0;K<l/2;K++)
  20.                 {
  21.                     cf=s.charAt(K);
  22.                      if(ci==cf)
  23.                     h1++;
  24.                 }
  25.                 for(j=l/2;j<l;j++)
  26.                 {
  27.                     cf=s.charAt(j);
  28.                     if(ci==cf)
  29.                     h2++;
  30.  
  31.                 }
  32.                 if(h1!=h2)
  33.                 {
  34.                     fl=1;
  35.                     break;
  36.                 }
  37.  
  38.  
  39.             }
  40.         }
  41.         else if(l%2!=0){
  42.              for(i=0;i<l/2;i++)
  43.             { ci=s.charAt(i);
  44.             h1=0;
  45.                 h2=0;
  46.                 for(K=0;K<l/2;K++)
  47.                 {
  48.                     cf=s.charAt(K);
  49.                      if(ci==cf)
  50.                     h1++;
  51.                 }
  52.                 for(j=l/2+1;j<l;j++)
  53.                 {
  54.                     cf=s.charAt(j);
  55.                     if(ci==cf)
  56.                     h2++;
  57.  
  58.                 }
  59.                 if(h1!=h2)
  60.                 {
  61.                     fl=1;
  62.                     break;
  63.                 }
  64.                 h1=0;
  65.                 h2=0;
  66.  
  67.         }
  68.         }
  69.     if(fl==0)
  70.         System.out.println("YES");
  71.         else
  72.         System.out.println("NO");
  73.     }
  74.  
  75.      public static void main(String []args)throws IOException{
  76.  
  77.          InputStreamReader r=new InputStreamReader(System.in);  
  78.          BufferedReader br=new BufferedReader(r);  
  79.          int T,i;
  80.         String st;
  81.         T=Integer.parseInt(br.readLine());
  82.         HelloWorld ob=new HelloWorld();
  83.         for(i=1;i<=T;i++)
  84.         {
  85.             st=br.readLine();
  86.             ob.check(st);
  87.         }
  88.  
  89.      }
  90. }
Runtime error #stdin #stdout #stderr 0.07s 32772KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.lang.NumberFormatException: null
	at java.base/java.lang.Integer.parseInt(Integer.java:620)
	at java.base/java.lang.Integer.parseInt(Integer.java:776)
	at HelloWorld.main(Main.java:81)
https://ideone.com/4V1LNu
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
public

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