comefrom: <awangdev>265. Paint House II_2.java
code: public int minCostII(int[][] costs) {
          if (costs == null || costs.length == 0) return 0;
          if (costs.length == 1 && costs[0].length == 1) return costs[0][0];
  
          int n = costs.length, k = costs[0].length;
          int[][] dp = new int[2][k]; 
          
          for (int i = 1; i <= n; i++) {
              for (int j = 0; j < k; j++) {
                  dp[i % 2][j] = Integer.MAX_VALUE;
                  for (int m = 0; m < k; m++) {
                      if (j == m) continue; 
                      dp[i % 2][j] = Math.min(dp[i % 2][j], dp[(i - 1) % 2][m] + costs[i - 1][j]);
                  }
              }
          }
          
          int min = Integer.MAX_VALUE;
          for (int j = 0; j < k; j++) min = Math.min(min, dp[n % 2][j]);
          return min;
      }
masked: public int sample_funcname ( int [ ] [ ] var_0 ) {
    if ( var_0 == null || var_0 . length == 0 ) return 0 ;
    if ( var_0 . length == 1 && var_0 [ 0 ] . length == 1 ) return var_0 [ 0 ] [ 0 ] ;
    int var_5 = var_0 . length , var_6 = var_0 [ 0 ] . length ;
    int [ ] [ ] var_8 = new int [ 2 ] [ var_6 ] ;
    for ( int var_9 = 1 ;
    var_9 <= var_5 ;
    var_9 ++ ) {
      for ( int var_10 = 0 ;
      var_10 < var_6 ;
      var_10 ++ ) {
        var_8 [ var_9 % 2 ] [ var_10 ] = Integer . MAX_VALUE ;
        for ( int var_13 = 0 ;
        var_13 < var_6 ;
        var_13 ++ ) {
          if ( var_10 == var_13 ) continue ;
          var_8 [ var_9 % 2 ] [ var_10 ] = Math . min ( var_8 [ var_9 % 2 ] [ var_10 ] , var_8 [ ( var_9 - 1 ) % 2 ] [ var_13 ] + var_0 [ var_9 - 1 ] [ var_10 ] ) ;
        }
      }
    }
    int min = Integer . MAX_VALUE ;
    for ( int var_10 = 0 ;
    var_10 < var_6 ;
    var_10 ++ ) min = Math . min ( min , var_8 [ var_5 % 2 ] [ var_10 ] ) ;
    return min ;
  }
  