제출 #994060

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
994060		vjudge1	Rima (COCI17_rima)	C++17	56 / 140	1101 ms	56492 KiB

rima

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int h = 727, mod = 1e9 + 7;
const int h1 = 7369, mod1 = 998244353;
const int enc = 8369, mod2 = 1LL<<36;

int power(int a,int b,int md)
{
	int ans=1;
	while (b)
	{
		if (b&1)
			ans=ans*a%md;
		a=a*a%md;
		b>>=1;
	}
	return ans;
}

int en(int has,int has1)
{
	return (has1*enc+has)%mod2;
}

signed main()
{
	int n;
	cin>>n;
	map<int,vector<string>> mp;
	for (int i=0;i<n;i++)
	{
		string s;
		cin>>s;
		mp[s.size()].push_back(s);
	}
	vector<string> v;
	for (auto i:mp)
		for (auto j:i.second)
			v.push_back(j);
	reverse(v.begin(),v.end());
	map<int,int> ans;
	while (!v.empty())
	{
		string s=v.back();
		v.pop_back();
		int hs=0,hs1=0,m=s.size();
		for (int i=1;i<m;i++)
		{
			hs=hs*h+s[i],hs1=hs1*h1+s[i];
			hs%=mod,hs1%=mod1;
		}
		int mx;
		if (ans.find(en(hs,hs1))!=ans.end())
			mx=ans[en(hs,hs1)]+1;
		else
			mx=1;
		for (int c='a';c<='z';c++)
		{
			pair<int,int> p={hs,hs1};
			p.first+=power(h,m-1,mod)*c%mod;
			p.second+=power(h1,m-1,mod1)*c%mod1;
			p.first%=mod,p.second%=mod1;
			if (ans.find(en(p.first,p.second))!=ans.end())
				mx=max(mx,ans[en(p.first,p.second)]+1);
		}
		for (int c='a';c<='z';c++)
		{
			pair<int,int> p={hs,hs1};
			p.first+=power(h,m-1,mod)*c%mod;
			p.second+=power(h1,m-1,mod1)*c%mod1;
			p.first%=mod,p.second%=mod1;
			if (ans.find(en(p.first,p.second))!=ans.end() or c==s[0])
				ans[en(p.first,p.second)]=mx;
		}
	}
	int res=0;
	for (auto i:ans)
		res=max(res,i.second);
	cout<<res<<endl;
	
	return 0;
}

• Subtask 1: 56 / 140