View Compilation Error

0_0_36412825_18899.cpp:10:5: error: 'vector' does not name a type
     vector<int> G[N];
     ^
0_0_36412825_18899.cpp:12:17: error: variable or field 'dfs_sz' declared void
     void dfs_sz(res x,res fax,res depx){
                 ^
0_0_36412825_18899.cpp:12:17: error: 'res' was not declared in this scope
0_0_36412825_18899.cpp:12:23: error: 'res' was not declared in this scope
     void dfs_sz(res x,res fax,res depx){
                       ^
0_0_36412825_18899.cpp:12:31: error: 'res' was not declared in this scope
     void dfs_sz(res x,res fax,res depx){
                               ^
0_0_36412825_18899.cpp:146:1: error: expected '}' at end of input
 }
 ^