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Finding a rectangle whose four corners are 1's in a given Boolean matrix.

License: MIT License

Java 30.63% Python 61.06% C++ 8.31%
algorithms boolean java matrices problem programming python rectangle search submatrix

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fourcornersproblem's Issues

test matrices programming language independent

We should refactor the tests in the different programming languages to use the same files with test matrices as well as the same results for checkup. Already started in the perl branch ...

Runtime explanation

Brief explanation of O(m*n) runtime.

For the Java code:

  • If m >= n, then the runtime is roughly O(m*n + n^2) = O(m*n) because there are roughly n^2 possible pairs of columns

  • If m < n, then the runtime is roughly O(m*n + m^2) = O(m*n) because there are roughly m^2 possible pairs of rows

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