POJ 2585 Window pains Violent enumeration arrangement

Test instructions

There are 9 windows in the 4*4 grid, and the window will cover the window below it, asking if there is a window placed in the order that the final result is the same as the input.

Analysis:

Violence can be violent in the case of small data size without pruning (clear code is simple), and violence is generally divided into enumerated subsets (for (S=0;s<1<<n;++s)) and enumeration permutations (next_permutation).

Code:

POJ 2585 Window pains Violent enumeration arrangement