View Compilation Error

0_0_1406748_11303.cpp:7: error: size of array `sq' is too large
0_0_1406748_11303.cpp: In function `int BFS(int, int)':
0_0_1406748_11303.cpp:19: error: `sq' undeclared (first use this function)
0_0_1406748_11303.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)