View Compilation Error

0_0_4356977_28951.cpp: In function `void dij(int, int, int)':
0_0_4356977_28951.cpp:27: error: `pq' undeclared (first use this function)
0_0_4356977_28951.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4356977_28951.cpp:27: error: `>>' should be `> >' within a nested template argument list