View Compilation Error

0_0_28607208_14793.cpp:23:1: error: 'map' does not name a type
 map<pair<int, int>, int> mp;
 ^
0_0_28607208_14793.cpp: In function 'void init()':
0_0_28607208_14793.cpp:26:5: error: 'mp' was not declared in this scope
     mp.clear();
     ^
0_0_28607208_14793.cpp: In function 'void tarjan(int, int)':
0_0_28607208_14793.cpp:58:13: error: 'mp' was not declared in this scope
             mp.insert(make_pair(make_pair(u, v), d));  
             ^
0_0_28607208_14793.cpp: In function 'int main()':
0_0_28607208_14793.cpp:84:16: error: 'mp' was not declared in this scope
             if(mp.count(make_pair(p[i].u, p[i].v))){
                ^