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  1. class Tweet {
  2.  
  3.     public static void main(String[] args) throws java.io.IOException {
  4.         java.io.BufferedReader r = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
  5.         String[] t = r.readLine().split(" ");
  6.  
  7.         int N = Integer.parseInt(t[0]);
  8.         int K = Integer.parseInt(t[1]);
  9.  
  10.         boolean arr[] = new boolean[N];
  11.  
  12.         java.util.Arrays.fill(arr, false);
  13.         int count = 0;
  14.         for (int i = 0; i < K; i++) {
  15.             String t1 = r.readLine();
  16.             int n = t1.length();
  17.  
  18.             char a = t1.charAt(n - 1);
  19.  
  20.             if (a == 'L') {
  21.                 java.util.Arrays.fill(arr, false);
  22.                 count = 0;
  23.                 System.out.println(count);
  24.             } else {
  25.                 int c = Integer.parseInt(t1.substring(n - 1, n));
  26.                 c = c - 1;
  27.                 if (arr[c] ) {
  28.                     arr[c] = false;
  29.                     count--;
  30.                 } else {
  31.                     arr[c] = true;
  32.                     count++;
  33.                 }
  34.                 System.out.println(count);
  35.             }
  36.  
  37.         }
  38.     }
  39. }
Runtime error #stdin #stdout #stderr 0.07s 381184KB
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stdin
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10 1
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stdout
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Standard output is empty
stderr
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Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1
	at Tweet.main(Main.java:27)
https://ideone.com/J3TYWf
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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