View Compilation Error

0_0_36978858_6215.cpp: In function 'void dij()':
0_0_36978858_6215.cpp:32:48: error: template argument 3 is invalid
  priority_queue<PII, vector<PII>, greater<PII> qu;
                                                ^
0_0_36978858_6215.cpp:34:2: error: 'qu' was not declared in this scope
  qu.push({0, 1});
  ^