View Compilation Error

0_0_30760268_22090.cpp:22:1: error: 'unordered_map' does not name a type
 unordered_map<int,int> listX, listY, listXY, listYX;
 ^
0_0_30760268_22090.cpp:23:1: error: 'unordered_map' does not name a type
 unordered_map<pii,int> list;
 ^
0_0_30760268_22090.cpp: In function 'void solve()':
0_0_30760268_22090.cpp:64:5: error: 'listX' was not declared in this scope
     listX.clear();
     ^
0_0_30760268_22090.cpp:65:5: error: 'listY' was not declared in this scope
     listY.clear();
     ^
0_0_30760268_22090.cpp:66:5: error: 'listXY' was not declared in this scope
     listXY.clear();
     ^
0_0_30760268_22090.cpp:67:5: error: 'listYX' was not declared in this scope
     listYX.clear();
     ^
0_0_30760268_22090.cpp:68:5: error: 'list' was not declared in this scope
     list.clear();
     ^
0_0_30760268_22090.cpp:100:33: error: 'Ly' was not declared in this scope
         int numx = listXY[x] - (Ly - num) * num;
                                 ^