View Compilation Error

0_0_34234414_14127.cpp: In function 'long long unsigned int askhash(int, int)':
0_0_34234414_14127.cpp:25:34: error: 'ha' was not declared in this scope
 ull askhash(int l,int r) {return ha[r]-ha[l-1]*po[r-l+1];}
                                  ^
0_0_34234414_14127.cpp:25:48: error: 'po' was not declared in this scope
 ull askhash(int l,int r) {return ha[r]-ha[l-1]*po[r-l+1];}
                                                ^
0_0_34234414_14127.cpp: In function 'int main()':
0_0_34234414_14127.cpp:40:33: error: 'po' was not declared in this scope
   scanf("%s",s+1),m=strlen(s+1),po[0]=1;
                                 ^
0_0_34234414_14127.cpp:41:41: error: 'ha' was not declared in this scope
   for(int i=1;i<=m;i++) po[i]=po[i-1]*P,ha[i]=ha[i-1]*P+s[i];
                                         ^