0_0_7698309_19156.cpp: In function `void bfs(int, int, int)':
0_0_7698309_19156.cpp:28: error: `ABS' undeclared (first use this function)
0_0_7698309_19156.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7698309_19156.cpp: In function `int ABS(int)':
0_0_7698309_19156.cpp:43: error: `int ABS(int)' used prior to declaration
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