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Submission #116854

# Submission time Handle Problem Language Result Execution time Memory
116854 2019-06-14T02:49:03 Z shuvi_dola Lozinke (COCI17_lozinke) C++14
100 / 100
 927 ms 28416 KB 
#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second

using namespace std;
const int N = 20003;
const long long A = 91382323;
const long long B = 1e9+7;

string s[N];
int h[N][13];
int pw[13];
set <pair<int,int> > tmp;
set <pair<int,int> > app;

map <int ,int> m[13];
map <int ,int> cnt[13];
map <int ,int> cnt1[13];
long long gethash(int l,int r,int pos)
{
	// cout<<h[pos][r]<<' '<<h[pos][l-1]<<'\n';
	return ( (h[pos][r] - h[pos][l-1]*pw[r-l+1]) % B + 10*B ) % B;
}


signed main()
{
	int n;
	cin>>n;
	pw[0] = 1;
	for(int i=1;i<13;i++)
	{
		pw[i] = (pw[i-1] * A) % B;
	}

	for(int i=1;i<=n;i++)
	{
		cin>>s[i];
		s[i] = "1" + s[i];
		int len = s[i].length();
		for(int j=1;j<len;j++)
		{
			h[i][j] = ( h[i][j-1]*A + (int)(s[i][j]) ) % B;
		}

		// cout<<h[i][len-1]<<'\n';
		app.insert({len-1, h[i][len-1]});
		cnt[len-1][h[i][len-1]]++;
	}

	for(int i=1;i<=n;i++)
	{
		tmp.clear();
		int len = s[i].length();

		for(int l=1;l<len;l++)
		{
			for(int r=l;r<len;r++)
			{
				if(l == 1 && r == len-1)
					continue;

				long long val = gethash(l,r,i);
				if(m[r-l+1][val] == false)
				{
					cnt1[r-l+1][val]++;
					m[r-l+1][val] = true;

					tmp.insert({r-l+1, val});
				}
				
			}
		}

		for(auto x:tmp)
		{
			m[x.fi][x.se] = false;
		}
	}

	long long ans = 0;
	for(auto x:app)
	{
		// cout<<x.fi<<' ';
		// cout<<cnt[x.fi][x.se]<<' '<<cnt1[x.fi][x.se]<<'\n';
		ans += cnt[x.fi][x.se] * (cnt[x.fi][x.se] - 1);
		ans += cnt[x.fi][x.se] * cnt1[x.fi][x.se];
	}
	cout<<ans;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 896 KB Output is correct
2 Correct 2 ms 1024 KB Output is correct
3 Correct 3 ms 1024 KB Output is correct
4 Correct 4 ms 1152 KB Output is correct
5 Correct 11 ms 1792 KB Output is correct
6 Correct 17 ms 1764 KB Output is correct
7 Correct 26 ms 2936 KB Output is correct
8 Correct 57 ms 4344 KB Output is correct
9 Correct 101 ms 5340 KB Output is correct
10 Correct 364 ms 13300 KB Output is correct
11 Correct 189 ms 8828 KB Output is correct
12 Correct 887 ms 28356 KB Output is correct
13 Correct 243 ms 7004 KB Output is correct
14 Correct 597 ms 26872 KB Output is correct
15 Correct 927 ms 28416 KB Output is correct
16 Correct 175 ms 3348 KB Output is correct
17 Correct 30 ms 2944 KB Output is correct
18 Correct 25 ms 3072 KB Output is correct
19 Correct 451 ms 16136 KB Output is correct
20 Correct 86 ms 3328 KB Output is correct