0_0_10714132_19826.cpp: In function `int dfs_max_flow(int, int, int)':
0_0_10714132_19826.cpp:27: error: `dfs' undeclared (first use this function)
0_0_10714132_19826.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10714132_19826.cpp: In function `int dfs(int, int, int, int)':
0_0_10714132_19826.cpp:35: error: `int dfs(int, int, int, int)' used prior to declaration
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