Submission #464693

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
464693	2021-08-13T17:10:21 Z	prvocislo	Difference (POI11_roz)	C++17	100 / 100	102 ms	2408 KB

#include <iostream>
#include <vector>
#include <set>
#include <algorithm>
using namespace std;

const int maxn = 1e6 + 5, abc = 26;
int ans = 0;
int pf[abc][abc], pfmin[abc][abc], last[abc][abc];
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	string s;
	cin >> s;
	for (int i = 0; i < abc; i++) for (int j = 0; j < abc; j++) pfmin[i][j] = 1e9;
	for (int i = 0; i < n; i++)
	{
		int a = s[i] - 'a';
		for (int b = 0; b < abc; b++) if (a ^ b)
		{
			pf[a][b]++;
			ans = max(ans, pf[a][b] - pfmin[a][b]);
			pfmin[b][a] = min(pfmin[b][a], last[b][a]);
			last[b][a] = --pf[b][a];
			ans = max(ans, pf[b][a] - pfmin[b][a]);
		}
	}
	cout << ans << "\n";
	return 0;
}

Subtask #1
10.0 / 10.0

#	Verdict	Memory	Grader output
1	Correct	204 KB	Output is correct
2	Correct	204 KB	Output is correct
3	Correct	204 KB	Output is correct
4	Correct	204 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	1 ms	224 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	316 KB	Output is correct

Subtask #5
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct

Subtask #6
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	588 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct

Subtask #7
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	92 ms	2408 KB	Output is correct
2	Correct	0 ms	320 KB	Output is correct
3	Correct	73 ms	2140 KB	Output is correct

Subtask #8
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	96 ms	2280 KB	Output is correct
2	Correct	72 ms	2144 KB	Output is correct
3	Correct	73 ms	2144 KB	Output is correct

Subtask #9
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	102 ms	2408 KB	Output is correct
2	Correct	86 ms	2408 KB	Output is correct
3	Correct	83 ms	2280 KB	Output is correct

Subtask #10
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	89 ms	2408 KB	Output is correct
2	Correct	86 ms	2408 KB	Output is correct
3	Correct	80 ms	2408 KB	Output is correct

Submission #464693

Compilation message