foo.cpp: In function 'void BFS(int, int, int, int)':
foo.cpp:27:21: error: 'mp' was not declared in this scope
foo.cpp:31:19: error: 'struct std::pair<int, int>' has no member named 'x'
foo.cpp:32:19: error: 'struct std::pair<int, int>' has no member named 'y'
foo.cpp:35:15: error: 'REP2' was not declared in this scope
foo.cpp:36:3: error: expected ';' before '{' token
foo.cpp:199:1: error: expected '}' at end of input
foo.cpp:31:7: warning: unused variable 'x' [-Wunused-variable]
foo.cpp:32:7: warning: unused variable 'y' [-Wunused-variable]
foo.cpp:199:1: error: expected '}' at end of input