I can't find valid gerrymandered division. Every valid partition results in 3 or more districts won by Blue. district_population=15 grid=[ [[1, 0], [0, 5], [0, 1], [5, 0], [1, 0]], [[0, 2], [0, 3], [0, 2], [0, 4], [2, 0]], [[3, 0], [4, 0], [1, 0], [0, 5], [0, 4]], [[0, 5], [0, 3], [2, 0], [5, 0], [0, 3]], [[0, 4], [0, 1], [0, 2], [0, 3], [0, 4]]]