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  1. import java.util.*;
  2. import java.io.*;
  3.  
  4. public class MovieFestival2 {
  5. 	public static void main(String[] args) throws IOException {
  6. 		setIO();
  7.  
  8. 		st = nl();
  9. 		int N = ni(st), K = ni(st);
  10. 		Movie[] M = new Movie[N];
  11. 		for (int i = 0; i < N; i++) {
  12. 			st = nl();
  13. 			int s = ni(st), e = ni(st);
  14. 			M[i] = new Movie(s, e);
  15. 		}
  16. 		Arrays.sort(M);
  17.  
  18. 		ms.put(0, K);
  19.  
  20. 		int ans = 0;
  21. 		for (int i = 0; i < N; i++) {
  22. 			if (ms.floorKey(M[i].s) != null) {
  23. 				delete(ms.floorKey(M[i].s));
  24. 				add(M[i].e);
  25.  
  26. 				ans++;
  27. 			}
  28. 		}
  29.  
  30. 		out.println(ans);
  31.  
  32. 		f.close();
  33. 		out.close();
  34. 	}
  35.  
  36. 	static TreeMap<Integer, Integer> ms = new TreeMap<>();
  37.  
  38. 	static void add(int x) {
  39. 		ms.put(x, ms.getOrDefault(x, 0) + 1);
  40. 	}
  41.  
  42. 	static void delete(int x) {
  43. 		int c = ms.get(x);
  44. 		ms.put(x, --c);
  45. 		if (c == 0)
  46. 			ms.remove(x);
  47. 	}
  48.  
  49. 	static class Movie implements Comparable<Movie> {
  50. 		int s, e;
  51. 		Movie(int s, int e) {
  52. 			this.s = s;
  53. 			this.e = e;
  54. 		}
  55.  
  56. 		public int compareTo(Movie o) {
  57. 			return Integer.compare(this.e, o.e);
  58. 		}
  59. 	}
  60.  
  61. 	static BufferedReader f;
  62. 	static PrintWriter out;
  63. 	static StringTokenizer st;
  64.  
  65. 	static int ni(StringTokenizer st) {
  66. 		return Integer.parseInt(st.nextToken());
  67. 	}
  68.  
  69. 	static int ni() throws IOException {
  70. 		return Integer.parseInt(f.readLine());
  71. 	}
  72.  
  73. 	static StringTokenizer nl() throws IOException {
  74. 		return new StringTokenizer(f.readLine());
  75. 	}
  76.  
  77. 	static int[] nia(int N) throws IOException {
  78. 		StringTokenizer st = nl();
  79. 		int[] A = new int[N];
  80. 		for (int i = 0; i < N; i++)
  81. 			A[i] = ni(st);
  82. 		return A;
  83. 	}
  84.  
  85. 	static void setIn(String s) throws IOException {
  86. 		f = new BufferedReader(new FileReader(s));
  87. 	}
  88.  
  89. 	static void setOut(String s) throws IOException {
  90. 		out = new PrintWriter(new FileWriter(s));
  91. 	}
  92.  
  93. 	static void setIn() {
  94. 		f = new BufferedReader(new InputStreamReader(System.in));
  95. 	}
  96.  
  97. 	static void setOut() {
  98. 		out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
  99. 	}
  100.  
  101. 	static void setIO(String s) throws IOException {
  102. 		setIn(s + ".in");
  103. 		setOut(s + ".out");
  104. 	}
  105.  
  106. 	static void setIO() {
  107. 		setIn();
  108. 		setOut();
  109. 	}
  110. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:4: error: class MovieFestival2 is public, should be declared in a file named MovieFestival2.java
public class MovieFestival2 {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/AKdglG
Movie Festival II
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
secret

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