View Compilation Error

0_0_39697055_21329.cpp:14:1: error: 'vector' does not name a type
   14 | vector<pair<int,int> > G[maxn];
      | ^~~~~~
0_0_39697055_21329.cpp: In function 'void init()':
0_0_39697055_21329.cpp:21:38: error: 'G' was not declared in this scope
   21 |         for (int i = 1; i <= n; i++) G[i].clear();
      |                                      ^
0_0_39697055_21329.cpp: In function 'int main()':
0_0_39697055_21329.cpp:47:13: error: 'G' was not declared in this scope
   47 |             G[u].push_back({v, k});
      |             ^
0_0_39697055_21329.cpp:61:45: error: 'G' was not declared in this scope
   61 |                         for (int k = 0; k < G[i].size(); k++)
      |                                             ^