oj.uz

Submission #250908

# Submission time Handle Problem Language Result Execution time Memory
250908 2020-07-19T12:04:48 Z srvlt Round words (IZhO13_rowords) C++14
12 / 100
 154 ms 504 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define ll long long
#define ld long double
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define SZ(x) (int)(x).size()
template <typename T> using ord_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int n0 = 2003, inf = 1e9;

struct T {
	int len, d1, d2;
	void clean() {
		len = 0, d1 = -inf, d2 = -inf;
	}
	void upd(const T & t) {
		if (t.len + 1 > len || (t.len == len && (max(0, t.d1) + 1 < d1 && max(0, t.d2) + 1 < d2))) {
			len = t.len + 1;
			d1 = max(0, t.d1) + 1;
			d2 = max(0, t.d2) + 1;
		}
	}
	void mx(const T & t) {
		if (t.len > len || (t.len == len && (t.d1 + 1 < d1 && t.d2 + 1 < d2))) {
			len = t.len;
			d1 = t.d1 + 1;
			d2 = t.d2 + 1;
		}
	}
};
T dp[n0];

int LCS(const string & a, const string & b) {
	int n = SZ(a), m = SZ(b);
	for (int j = 1; j <= m; j++)
		dp[j].clean();
	for (int i = 1; i <= n; i++) {
		for (int j = m; j >= 1; j--)
			if (a[i - 1] == b[j - 1])
				dp[j].upd(dp[j - 1]);
		for (int j = 1; j <= m; j++)
			dp[j].mx(dp[j - 1]);
		for (int j = 1; j <= m; j++)
			if (dp[j].d1 >= n / 2 || dp[j].d2 >= m / 2)
				dp[j].clean();
	}
	int res = 0;
	for (int j = 1; j <= m; j++)
		res = max(res, dp[j].len);
	return res;
}

int main() {
	ios_base::sync_with_stdio(false), cin.tie(NULL);
	#ifdef LOCAL
		freopen("input.txt", "r", stdin);
	#endif
	
	string a, b, A, B;
	cin >> a >> b;
	int res = 0;
	for (int i = 0; i < 4; i++) {
		A = a, B = b;
		if (i & 1) reverse(all(A));
		if (i & 2) reverse(all(B));
		A += A, B += B;
		res = max(res, LCS(A, B));
	}
	cout << res;
}

Subtask #1
12.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Incorrect 0 ms 384 KB Output isn't correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Incorrect 0 ms 384 KB Output isn't correct
6 Incorrect 9 ms 384 KB Output isn't correct
7 Correct 40 ms 384 KB Output is correct
8 Incorrect 140 ms 384 KB Output isn't correct
9 Incorrect 128 ms 504 KB Output isn't correct
10 Incorrect 104 ms 384 KB Output isn't correct
11 Incorrect 108 ms 504 KB Output isn't correct
12 Incorrect 91 ms 384 KB Output isn't correct
13 Incorrect 154 ms 384 KB Output isn't correct
14 Incorrect 119 ms 504 KB Output isn't correct
15 Incorrect 142 ms 416 KB Output isn't correct
16 Incorrect 149 ms 384 KB Output isn't correct
17 Incorrect 79 ms 384 KB Output isn't correct
18 Incorrect 133 ms 504 KB Output isn't correct
19 Incorrect 100 ms 384 KB Output isn't correct
20 Incorrect 143 ms 384 KB Output isn't correct
21 Incorrect 22 ms 384 KB Output isn't correct
22 Incorrect 41 ms 384 KB Output isn't correct
23 Incorrect 57 ms 504 KB Output isn't correct
24 Incorrect 61 ms 408 KB Output isn't correct
25 Incorrect 86 ms 384 KB Output isn't correct