View Compilation Error

0_0_21865455_6114.cpp: In function 'int main()':
0_0_21865455_6114.cpp:37:27: error: 'memset' was not declared in this scope
  memset(dp, -1, sizeof(dp));
                           ^
0_0_21865455_6114.cpp:41:29: error: 'reverse' was not declared in this scope
   reverse(s.begin(), s.end());
                             ^