````cpp
#include <bits/stdc++.h>
using namespace std;
int n;
const int p=13331;
unsigned long long int h[10010];
string t;
unsigned long long int Hash(string s){
int len=s.length();
unsigned long long int res=0;
for(int i=0;i<len;i++){
res=p*res+s[i];
}
return res;
}
int main(){
cin>>n;
for(int i=1;i<=n;i++){
cin>>t;
h[i]=Hash(t);
}
sort(h+1,h+n+1);
int ans=unique(h+1,h+n+1)-h-1;
cout<<ans;
return 0;
}
```````
by gaojizhe05 @ 2023-11-18 11:00:49
要什么哈希，卡常
by _Asriel_ @ 2023-11-18 16:44:08