View Compilation Error

0_0_20024277_31341.cpp: In function 'int main()':
0_0_20024277_31341.cpp:64:32: error: 'class std::stack<int>' has no member named 'clear'
   for(int i=1;i<=n;i++) pre[i].clear(),dom[i].clear();
                                ^
0_0_20024277_31341.cpp:64:47: error: 'class std::stack<int>' has no member named 'clear'
   for(int i=1;i<=n;i++) pre[i].clear(),dom[i].clear();
                                               ^