View Compilation Error

0_0_38931632_18544.cpp:16:1: error: 'vector' does not name a type
   16 | vector<int>q[maxn];
      | ^~~~~~
0_0_38931632_18544.cpp: In function 'int main()':
0_0_38931632_18544.cpp:40:33: error: 'q' was not declared in this scope
   40 |                                 q[i].push_back(query1(j,j+len-1));
      |                                 ^
0_0_38931632_18544.cpp:48:39: error: 'q' was not declared in this scope
   48 |                         for(int i=0;i<q[x].size();i++){
      |                                       ^