View Compilation Error

0_0_23071108_3599.cpp: In function 'int main()':
0_0_23071108_3599.cpp:64:9: error: 'map' was not declared in this scope
         map<int,int>mp;
         ^
0_0_23071108_3599.cpp:64:13: error: expected primary-expression before 'int'
         map<int,int>mp;
             ^
0_0_23071108_3599.cpp:66:13: error: 'mp' was not declared in this scope
             mp[a[i]] = i;
             ^
0_0_23071108_3599.cpp:77:30: error: 'mp' was not declared in this scope
             node2[i].start = mp[node2[i].start];
                              ^