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Submission #879719

# Submission time Handle Problem Language Result Execution time Memory
879719 2023-11-28T02:08:03 Z leastmerryfish Round words (IZhO13_rowords) C++17
100 / 100
 88 ms 125588 KB 
#include <bits/stdc++.h>
using namespace std;
const int mx = 4004;
int dp[mx][mx], dir[mx][mx], n, m;
string a, b;

int solve() {
    int x, ans = 0;

    for (int i = 0; i <= n * 2; i++)
        for (int j = 0; j <= m; j++) {
            if (i == 0 && j == 0) dp[i][j] = 0, dir[i][j] = -1;
            else {
                dp[i][j] = dir[i][j] = -1;
                if (j > 0 && dp[i][j] < (x = dp[i][j - 1]))
                    dp[i][j] = x, dir[i][j] = 0;
                if (i > 0 && j > 0 && a[(i - 1) % n] == b[j - 1] && dp[i][j] < (x = dp[i - 1][j - 1] + 1))
                    dp[i][j] = x, dir[i][j] = 1;
                if (i > 0 && dp[i][j] < (x = dp[i - 1][j]))
                    dp[i][j] = x, dir[i][j] = 2;
            }
        }
    for (int k=0; k<n; k++) {
        int i = n + k, j = m;
        x = 0;
        while (dir[i][j] != -1) {
            if (dir[i][j] == 0) j--;
            else if (dir[i][j] == 1) i--, j--, x++;
            else i--;
        }
        ans = max(ans, x);
        i = k + 1, j = 0;
        dir[i][j] = -1;

        while (j < m)
            if (dir[i][j + 1] == 0) j++;
            else {
                dir[i][j + 1] = 0;
                if (i++ == n * 2) break;
                if (dir[i][j + 1] == 1) j++;
            }
    }
    return ans;
}

int main() {
    cin >> a >> b;
    n = (int)a.length(), m = (int)b.length();
    int ans = solve();
    for (int i=0, j=n-1; i<j; i++, j--) {
        char tmp = a[i];
        a[i] = a[j];
        a[j] = tmp;
    }
    cout << max(ans, solve());
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 26 ms 66360 KB Output is correct
7 Correct 31 ms 66136 KB Output is correct
8 Correct 69 ms 66128 KB Output is correct
9 Correct 70 ms 66180 KB Output is correct
10 Correct 57 ms 66192 KB Output is correct
11 Correct 61 ms 72332 KB Output is correct
12 Correct 81 ms 78480 KB Output is correct
13 Correct 88 ms 78420 KB Output is correct
14 Correct 68 ms 74328 KB Output is correct
15 Correct 76 ms 80548 KB Output is correct
16 Correct 80 ms 70240 KB Output is correct
17 Correct 61 ms 94884 KB Output is correct
18 Correct 79 ms 96852 KB Output is correct
19 Correct 52 ms 66140 KB Output is correct
20 Correct 86 ms 86608 KB Output is correct
21 Correct 34 ms 109244 KB Output is correct
22 Correct 44 ms 115388 KB Output is correct
23 Correct 52 ms 115400 KB Output is correct
24 Correct 60 ms 121556 KB Output is correct
25 Correct 74 ms 125588 KB Output is correct