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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8.  
  9. public class Main {
  10.     public static void main(String[] args) {
  11.  
  12.         Scanner sc = new Scanner(System.in);
  13.  
  14.         int n = sc.nextInt();
  15.         int m = sc.nextInt();
  16.  
  17.         int[] arr = new int[n + 1];
  18.         String[] oper = new String[m + 1];
  19.  
  20.         // read array
  21.         for (int i = 1; i <= n; i++) {
  22.             arr[i] = sc.nextInt();
  23.         }
  24.  
  25.         // read operations
  26.         for (int i = 1; i <= m; i++) {
  27.             oper[i] = sc.next();
  28.         }
  29.  
  30.         // sets to store indices
  31.         TreeSet<Integer> set0 = new TreeSet<>();
  32.         TreeSet<Integer> set1 = new TreeSet<>();
  33.  
  34.         // initialize sets
  35.         for (int i = 1; i <= n; i++) {
  36.             if (arr[i] == 0) {
  37.                 set0.add(i);
  38.             } else {
  39.                 set1.add(i);
  40.             }
  41.         }
  42.  
  43.         // process operations
  44.         for (int i = 1; i <= m; i++) {
  45.  
  46.             String s = oper[i];
  47.  
  48.             // single character operation
  49.             if (s.length() == 1) {
  50.                 if (s.charAt(0) == 'L') {
  51.                     int y = set0.first();   // smallest index with 0
  52.                     arr[y] = 1;
  53.                     set0.remove(y);
  54.                     set1.add(y);
  55.                 }
  56.             }
  57.             else {
  58.                 int y = s.charAt(1) - '0';
  59.                 arr[y] = 0;
  60.                 set1.remove(y);
  61.                 set0.add(y);
  62.             }
  63.         }
  64.  
  65.         // output final array
  66.         for (int i = 1; i <= n; i++) {
  67.             System.out.print(arr[i] + " ");
  68.         }
  69.     }
  70. }
  71.  
Success #stdin #stdout 0.15s 59064KB
comments (?)
stdin
copy 
5 4
1 0 1 0 1
L C2 L C4
stdout
copy 
1 1 1 0 1
https://ideone.com/i76fvX
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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