View Compilation Error

0_0_25827908_7859.cpp:9:9: error: 'list' was not declared in this scope
 map<int,list<int> >a;
         ^
0_0_25827908_7859.cpp:9:17: error: template argument 2 is invalid
 map<int,list<int> >a;
                 ^
0_0_25827908_7859.cpp:9:17: error: template argument 4 is invalid
0_0_25827908_7859.cpp:9:19: error: expected unqualified-id before '>' token
 map<int,list<int> >a;
                   ^
0_0_25827908_7859.cpp: In function 'int main()':
0_0_25827908_7859.cpp:18:9: error: 'a' was not declared in this scope
         a.clear();
         ^