View Compilation Error

0_0_12967087_19564.cpp:10: error: size of array `vis' is too large
0_0_12967087_19564.cpp: In function `int main()':
0_0_12967087_19564.cpp:17: error: `vis' undeclared (first use this function)
0_0_12967087_19564.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)