View Compilation Error

0_0_18933120_27784.cpp: In function 'int main()':
0_0_18933120_27784.cpp:50:27: error: 'memset' was not declared in this scope
   memset(map,0,sizeof(map))
                           ^
0_0_18933120_27784.cpp:51:15: error: 'i' was not declared in this scope
   for(int i=0;i<n;i++)
               ^