public static void main ( String [ ] args ) throws IOException {
  Scanner in = new Scanner ( System . in ) ;
  PrintWriter pw = new PrintWriter ( System . out ) ;
  temp = new int [ N + 5 ] ;
  int n = in . nextInt ( ) , k = in . nextInt ( ) , m = in . nextInt ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int a = in . nextInt ( ) , b = in . nextInt ( ) ;
    temp [ a ] ++ ;
    temp [ b + 1 ] -- ;
  }
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    temp [ i ] += temp [ i - 1 ] ;
  }
  prefixSum = new int [ N + 5 ] ;
  for ( int i = 0 ;
  i <= N ;
  i ++ ) {
    if ( temp [ i ] >= k ) prefixSum [ i ] = 1 ;
  }
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    prefixSum [ i ] += prefixSum [ i - 1 ] ;
  };
}

public static void main ( String [ ] args ) throws IOException { Scanner in = new Scanner ( System . in ) ; PrintWriter pw = new PrintWriter ( System . out ) ; temp = new int [ N + 5 ] ; int n = in . nextInt ( ) , k = in . nextInt ( ) , m = in . nextInt ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int a = in . nextInt ( ) , b = in . nextInt ( ) ; temp [ a ] ++ ; temp [ b + 1 ] -- ; } for ( int i = 1 ; i <= N ; i ++ ) { temp [ i ] += temp [ i - 1 ] ; } prefixSum = new int [ N + 5 ] ; for ( int i = 0 ; i <= N ; i ++ ) { if ( temp [ i ] >= k ) prefixSum [ i ] = 1 ; } for ( int i = 1 ; i <= N ; i ++ ) { prefixSum [ i ] += prefixSum [ i - 1 ] ; } ; }
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