0_0_8171304_10878.cpp: In function `void bfs(int, int)':
0_0_8171304_10878.cpp:20: error: `queue' undeclared (first use this function)
0_0_8171304_10878.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8171304_10878.cpp:20: error: expected primary-expression before '>' token
0_0_8171304_10878.cpp:20: error: `q' undeclared (first use this function)
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