View Compilation Error

0_0_11538952_13694.cpp:11: error: expected constructor, destructor, or type conversion before '<' token
0_0_11538952_13694.cpp:11: error: expected `,' or `;' before '<' token
0_0_11538952_13694.cpp: In function `bool SPFA()':
0_0_11538952_13694.cpp:31: error: `q' undeclared (first use this function)
0_0_11538952_13694.cpp:31: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11538952_13694.cpp: In function `int main()':
0_0_11538952_13694.cpp:64: error: `q' undeclared (first use this function)