public static void main ( String [ ] args ) throws IOException {
  GreenhouseEffect obj = new GreenhouseEffect ( ) ;
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int [ ] arr = Stream . of ( br . readLine ( ) . split ( " " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
  int n = arr [ 0 ] ;
  int m = arr [ 1 ] ;
  dp = new int [ n ] [ n + 1 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    Arrays . fill ( dp [ i ] , - 1 ) ;
  }
  int [ ] val = new int [ n ] ;
  ;
}

public static void main ( String [ ] args ) throws IOException { GreenhouseEffect obj = new GreenhouseEffect ( ) ; BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int [ ] arr = Stream . of ( br . readLine ( ) . split ( " ▁ " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; int n = arr [ 0 ] ; int m = arr [ 1 ] ; dp = new int [ n ] [ n + 1 ] ; for ( int i = 0 ; i < n ; i ++ ) { Arrays . fill ( dp [ i ] , - 1 ) ; } int [ ] val = new int [ n ] ; ; }
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