View Compilation Error

330287_0_10971.cpp: In function `int Dijstra(int, int)':
330287_0_10971.cpp:67: error: `S2' cannot appear in a constant-expression
330287_0_10971.cpp:67: error: `.' cannot appear in a constant-expression
330287_0_10971.cpp:67: error: a function call cannot appear in a constant-expression
330287_0_10971.cpp:67: error: missing `>' to terminate the template argument list
330287_0_10971.cpp:67: error: could not convert `S1.top<<expression error> >' to `bool'