View Compilation Error

0_0_20163687_14411.cpp:42:2: error: 'wei' does not name a type
  wei[maxn],h[maxn]; 
  ^
0_0_20163687_14411.cpp: In function 'int main()':
0_0_20163687_14411.cpp:62:5: error: 'wei' was not declared in this scope
     wei[1]=1; 
     ^
0_0_20163687_14411.cpp:86:33: error: 'strlen' was not declared in this scope
         int len=(int)strlen(ss+1); 
                                 ^
0_0_20163687_14411.cpp:96:9: error: 'h' was not declared in this scope
         h[0]=0; 
         ^