View Compilation Error

0_0_33971821_140.cpp: In function 'int main()':
0_0_33971821_140.cpp:110:18: error: 'strlen' was not declared in this scope
   slen=strlen(str);
                  ^
0_0_33971821_140.cpp: In instantiation of 'int PAM<XN>::node(int) [with int XN = 300010]':
0_0_33971821_140.cpp:79:9:   required from 'void PAM<XN>::clear() [with int XN = 300010]'
0_0_33971821_140.cpp:113:13:   required from here
0_0_33971821_140.cpp:70:33: error: 'memset' was not declared in this scope
   memset(ch[sz],0,sizeof(ch[sz]));
                                 ^