View Compilation Error

0_0_4568939_22740.cpp:6: error: size of array `vis' is too large
0_0_4568939_22740.cpp: In function `void bfs(int, int)':
0_0_4568939_22740.cpp:18: error: `vis' undeclared (first use this function)
0_0_4568939_22740.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4568939_22740.cpp: In function `int main()':
0_0_4568939_22740.cpp:39: error: `vis' undeclared (first use this function)