View Compilation Error

0_0_11320723_5786.cpp:15: error: conflicting declaration 'node b[601000]'
0_0_11320723_5786.cpp:7: error: 'b' has a previous declaration as `int b[601000]'
0_0_11320723_5786.cpp:15: error: type mismatch with previous external decl of `node b[601000]'
0_0_11320723_5786.cpp:7: error: previous external decl of `int b[601000]'
0_0_11320723_5786.cpp:15: error: declaration of `node b[601000]'
0_0_11320723_5786.cpp:7: error: conflicts with previous declaration `int b[601000]'
0_0_11320723_5786.cpp: In function `int main()':
0_0_11320723_5786.cpp:27: error: `vis' undeclared (first use this function)
0_0_11320723_5786.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)