0_0_11256641_1093.cpp: In function `void dfs(int, int, int)':
0_0_11256641_1093.cpp:75: error: `new_x' undeclared (first use this function)
0_0_11256641_1093.cpp:75: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11256641_1093.cpp:75: error: `new_y' undeclared (first use this function)
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