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Submission #994090

# Submission time Handle Problem Language Result Execution time Memory
994090 2024-06-07T06:11:55 Z vjudge1 Rima (COCI17_rima) C++17
56 / 140
 648 ms 88052 KB 
#include <bits/stdc++.h>

using namespace std;

const long long mod = 1LL<<36;
const int M = 3e6, N = M/30;

long long pw[M];
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=100;i<N;i++)
		if (!not_pr[i])
		{
			hashes.push_back(i);
			i+=100;
		}
	srand(time(NULL));
	long long h=hashes[rand()%265];
	
	pw[0]=1;
	for (int i=1;i<M;i++)
		pw[i]=pw[i-1]*h%mod;
	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);
	}
	unordered_map<long long,int> ans;
	for (auto what:mp)
	{
		unordered_map<long long,int> temp,cnt;
		for (auto s:what.second)
		{
			long long hs=0;
			int m=s.size();
			for (int i=1;i<m;i++)
				hs=hs*h+s[i],hs%=mod;
			int mx;
			if (ans.find(hs)!=ans.end())
				mx=ans[hs]+1;
			else
				mx=1;
			for (int c='a';c<='z';c++)
			{
				if (ans.find((hs+pw[m-1]*c%mod)%mod)!=ans.end())
					mx=max(mx,ans[(hs+pw[m-1]*c%mod)%mod]+1);
			}
			temp[hs]=mx;
			cnt[hs]++;
		}
		for (auto s:what.second)
		{
			long long hs=0;
			int m=s.size();
			for (int i=1;i<m;i++)
				hs=hs*h+s[i],hs%=mod;
			char c=s[0];
			ans[(hs+pw[m-1]*c%mod)%mod]=temp[hs]+cnt[hs]-1;
		}
	}
	int res=0;
	for (auto i:ans)
		res=max(res,i.second);
	cout<<res<<endl;
	
	return 0;
}

Subtask #1
56.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23896 KB Output is correct
2 Correct 17 ms 23896 KB Output is correct
3 Correct 18 ms 23900 KB Output is correct
4 Incorrect 648 ms 88052 KB Output isn't correct
5 Correct 41 ms 27228 KB Output is correct
6 Incorrect 22 ms 25416 KB Output isn't correct
7 Incorrect 22 ms 25172 KB Output isn't correct
8 Incorrect 22 ms 25188 KB Output isn't correct
9 Incorrect 53 ms 29064 KB Output isn't correct
10 Incorrect 22 ms 25140 KB Output isn't correct