View Compilation Error

0_0_37706067_26909.cpp: In function 'void init()':
0_0_37706067_26909.cpp:10:15: error: 'strlen' was not declared in this scope
  len1=strlen(s);
               ^
0_0_37706067_26909.cpp: In function 'void manacher()':
0_0_37706067_26909.cpp:25:21: error: 'memset' was not declared in this scope
  memset(p,0,sizeof p);
                     ^