View Compilation Error

0_0_24727087_2042.cpp:2:1: error: 'vector' does not name a type
 vector<int>e[MAX];
 ^
0_0_24727087_2042.cpp:3:1: error: 'vector' does not name a type
 vector<int>son;
 ^
0_0_24727087_2042.cpp:4:1: error: 'vector' does not name a type
 vector<int>dp;
 ^
0_0_24727087_2042.cpp: In function 'int DFS(int, int)':
0_0_24727087_2042.cpp:8:5: error: 'son' was not declared in this scope
     son[r]=1;
     ^
0_0_24727087_2042.cpp:9:5: error: 'dp' was not declared in this scope
     dp[r]=0;
     ^
0_0_24727087_2042.cpp:10:15: error: 'e' was not declared in this scope
     for(i=0;i<e[r].size();i++){
               ^
0_0_24727087_2042.cpp: At global scope:
0_0_24727087_2042.cpp:29:5: error: 'vector' does not name a type
     vector<int> sumOfDistancesInTree(int N, vector<vector<int>>& edges) {
     ^