View Compilation Error

0_0_24211965_2233.cpp:15:1: error: 'unorderd_map' does not name a type
 unorderd_map <int,long long> mulsum;
 ^
0_0_24211965_2233.cpp: In function 'void mainwork()':
0_0_24211965_2233.cpp:50:2: error: 'mulsum' was not declared in this scope
  mulsum.clear();mulsum[0]=1;
  ^