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constexpr int di[8] = {1, 0, -1, 0, 1, -1, -1, 1};
constexpr int dj[8] = {0, 1, 0, -1, 1, 1, -1, -1};
#line 1 "others/didj.cpp"
constexpr int di[8] = {1, 0, -1, 0, 1, -1, -1, 1};
constexpr int dj[8] = {0, 1, 0, -1, 1, 1, -1, -1};