View Compilation Error

0_0_32879791_1787.cpp: In function 'int main()':
0_0_32879791_1787.cpp:16:9: error: 'class std::priority_queue<int, std::deque<int>, std::greater<int> >' has no member named 'clear'
    q[i].clear();
         ^
0_0_32879791_1787.cpp:17:10: error: 'class std::queue<int>' has no member named 'clear'
    q1[i].clear();
          ^