题目连接

题面：

代码：

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<string>
#include<cmath>
#include<queue>
#include<set>
#define ll long long
#define llu unsigned ll
using namespace std;
const int maxn=100100;
const int p=13331;
char str[maxn];
set<llu>se;

llu ha(void)
{
    llu ans=0;
    for(int i=0;str[i];i++)
        ans=ans*p+str[i];
    return ans;
}

int main(void)
{
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        scanf("%s",str);
        se.insert(ha());
    }
    cout<<se.size()<<endl;
    return 0;
}