Canadian Computing Competition: 2014 Stage 1, Senior #4
You are laying rectangular pieces of grey-tinted glass to make a stained glass window. Each piece of glass adds an integer value "tint-factor". Where two pieces of glass overlap, the tint-factor is the sum of their tint-factors.
You know the desired position for each piece of glass and these pieces of glass are placed such that the sides of each rectangle are parallel to either the -axis or the -axis (that is, there are no "diagonal" pieces of glass).
You would like to know the total area of the finished stained glass window with a tint-factor of at least .
The first line of input is the integer (), the number of pieces of glass. The second line of input is the integer (), the threshold for the tint-factor. Each of the next lines contain five integers, representing the position of the top-left and bottom-right corners of the th piece of tinted glass followed by the tint-factor of that piece of glass. Specifically, the integers are placed in the order , where the top-left corner is at and the bottom-right corner is at , and tint-factor is . You can assume that . The top-most, left-most co-ordinate where glass can be placed is and you may assume and , and
The following additional constraints will apply.
- At least 10% of the marks will be for test cases where and ;
- at least 30% of the marks will be for test cases where and ;
- at least 40% of the marks will be for test cases where and ;
- the remaining marks will be for test cases where and .
Output the total area of the finished stained glass window which has a tint-factor of at least . All output will be less than , and the output for some test cases will be larger than .
4 3 11 11 20 15 1 13 8 14 17 2 17 8 18 17 1 12 12 19 13 1
Output for Sample Input
Explanation of Output for Sample Input
There are 4 pieces of glass used. There are two regions of glass which have a tint-factor greater than or equal to 3: one region between and (which has tint-factor of 3, except for a unit square with tint-factor 4), and another region between and (with tint-factor 3). In total, these two regions have 5 square units of glass with tint-factor greater than or equal to 3, as shown on the diagram below.