View Compilation Error

0_0_36437632_21310.cpp:11:1: error: invalid use of template-name 'std::priority_queue' without an argument list
 priority_queue q[3];
 ^
0_0_36437632_21310.cpp: In function 'int main()':
0_0_36437632_21310.cpp:18:8: error: 's' was not declared in this scope
   cin>>s;
        ^
0_0_36437632_21310.cpp:22:4: error: 'q' was not declared in this scope
    q[a-1].push(b);
    ^
0_0_36437632_21310.cpp:27:8: error: 'q' was not declared in this scope
    if (q[a-1].empty())
        ^