View Compilation Error

0_0_37842082_12737.cpp: In function 'int main()':
0_0_37842082_12737.cpp:31:27: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'frist'
    while(now<n && st[now].frist<=it) q.push(st[now++].se);
                           ^
0_0_37842082_12737.cpp:31:55: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'se'
    while(now<n && st[now].frist<=it) q.push(st[now++].se);
                                                       ^
0_0_37842082_12737.cpp:33:31: error: 't' was not declared in this scope
    while(q.size() && q.pop()==t)
                               ^
0_0_37842082_12737.cpp:39:7: error: 'num' was not declared in this scope
    if(num%k)
       ^
0_0_37842082_12737.cpp:42:23: error: 'x' was not declared in this scope
     while(q.size() && x--) q.pop();
                       ^