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How would I check if grid contains rectangles
My approach would be brute force, aka check every possible rectangle.
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I tried going via x and checking if the coordinates were empty and then mark when it is not empty, going to the next line and checking if the spaces are empty to the marked line, but that doesn't work, when the top one is larger and the bottom one is still rectangle.
You have been very careful to give only extremely vague information about what you did.
The only answer is that you did it wrong, but your code is secret, no further help is possible.
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Ok, so according to the first solution, I have something like this.
Can you complete your code with all necessary input so we can run it exactly the same.
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The only problem is, that instead of 12 it returns one less, so 11.
Your code do not behave the way you expect, or you don't understand why !
There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia[
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Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[
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Basic Debugging with Visual Studio 2010 - YouTube[
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27.3. pdb — The Python Debugger — Python 3.6.1 documentation[
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Debugging in Python | Python Conquers The Universe[
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pdb – Interactive Debugger - Python Module of the Week[
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The debugger is here to only show you what your code is doing and your task is to compare with what it should do.