Submission #994129

#	Time	Username	Problem	Language	Result	Execution time	Memory
994129		vjudge1	Rima (COCI17_rima)	C++17	56 / 140	699 ms	76760 KiB

rima

#include <bits/stdc++.h>

using namespace std;

const int mod = 1e9+7, N = 3e5;

#define int long long

bool not_pr[N];

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(NULL),cout.tie(NULL);
	vector<long long> hashes;
	for (int i=2;i<N;i++)
		for (int j=i+i;j<N;j+=i)
			not_pr[j]=true;
	for (int i=200;i<N;i++)
		if (!not_pr[i])
		{
			hashes.push_back(i);
			i+=100;
		}
	srand(time(NULL));
	long long h=hashes[rand()%2725];
	
	int n;
	cin>>n;
	map<int,vector<string>> mp;
	unordered_set<int> se;
	se.reserve(n+369);
	for (int i=0;i<n;i++)
	{
		string s;
		cin>>s;
		reverse(s.begin(),s.end());
		mp[s.size()].push_back(s);
		int m=s.size(),hs=0;
		for (int j=0;j<m;j++)
			hs=(hs*h+s[j])%mod;
		se.insert(hs);
	}
	vector<string> v;
	for (auto i:mp)
		for (auto j:i.second)
			v.push_back(j);
	reverse(v.begin(),v.end());
	unordered_map<int,int> ans;
	ans.reserve(n+369);
	while (!v.empty())
	{
		string s=v.back();
		v.pop_back();
		int m=s.size();
		int hs=0,mx=0;
		for (int i=0;i<m-1;i++)
			hs=(hs*h+s[i])%mod;
		if (ans.find(hs)!=ans.end())
			mx=ans[hs];
		for (int c='a';c<='z';c++)
		{
			if (se.find((hs*h+c)%mod)!=se.end())
				mx++;
		}
		ans[(hs*h+s[m-1])%mod]=mx;
	}
	int res=0;
	for (auto i:ans)
		res=max(res,i.second);
	cout<<res<<endl;
	
	return 0;
}

• Subtask 1: 56 / 140