comefrom: <awangdev>72. Edit Distance_6.java
code: public int minDistance(String word1, String word2) {
  		if (word1 == null && word2 != null) {
  			return word2.length();
  		} else if (word1 != null && word2 == null) {
  			return word1.length();
  		} else if (word1 == null && word2 == null) {
  			return 0;
  		}
  		int[][] DP = new int[word1.length() + 1][word2.length() + 1];
  		for (int i = 1; i <= word1.length(); i++) {
  			DP[i][0] = i;
  		}
  		for (int j = 1; j <= word2.length(); j++) {
  			DP[0][j] = j;
  		}
  
  		for (int i = 1; i <= word1.length(); i++) {
  			for (int j = 1; j <= word2.length(); j++) {
  				DP[i][j] = Math.min(Math.min(DP[i - 1][j] + 1, DP[i][j - 1] + 1), word1.charAt(i - 1) == word2.charAt(j - 1) ? DP[i - 1][j - 1] : DP[i - 1][j - 1] + 1);
  			}
  		}
  
  		return DP[word1.length()][word2.length()];
      }
masked: public int sample_funcname ( String var_1 , String var_2 ) {
    if ( var_1 == null && var_2 != null ) {
      return var_2 . length ( ) ;
    }
    else if ( var_1 != null && var_2 == null ) {
      return var_1 . length ( ) ;
    }
    else if ( var_1 == null && var_2 == null ) {
      return 0 ;
    }
    int [ ] [ ] var_7 = new int [ var_1 . length ( ) + 1 ] [ var_2 . length ( ) + 1 ] ;
    for ( int var_8 = 1 ;
    var_8 <= var_1 . length ( ) ;
    var_8 ++ ) {
      var_7 [ var_8 ] [ 0 ] = var_8 ;
    }
    for ( int var_9 = 1 ;
    var_9 <= var_2 . length ( ) ;
    var_9 ++ ) {
      var_7 [ 0 ] [ var_9 ] = var_9 ;
    }
    for ( int var_8 = 1 ;
    var_8 <= var_1 . length ( ) ;
    var_8 ++ ) {
      for ( int var_9 = 1 ;
      var_9 <= var_2 . length ( ) ;
      var_9 ++ ) {
        var_7 [ var_8 ] [ var_9 ] = Math . min ( Math . min ( var_7 [ var_8 - 1 ] [ var_9 ] + 1 , var_7 [ var_8 ] [ var_9 - 1 ] + 1 ) , var_1 . charAt ( var_8 - 1 ) == var_2 . charAt ( var_9 - 1 ) ? var_7 [ var_8 - 1 ] [ var_9 - 1 ] : var_7 [ var_8 - 1 ] [ var_9 - 1 ] + 1 ) ;
      }
    }
    return var_7 [ var_1 . length ( ) ] [ var_2 . length ( ) ] ;
  }
  