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Submission #386884

# Submission time Handle Problem Language Result Execution time Memory
386884 2021-04-07T15:20:36 Z two_sides Round words (IZhO13_rowords) C++17
68 / 100
 87 ms 63340 KB 
#include <bits/stdc++.h>

using namespace std;

template <class X, class Y>
bool cmax(X &a, const Y &b) {
    return a < b ? a = b, 1 : 0;
}
const int N = 2005;

int dp[N][N * 2], dir[N][N * 2], m, n;
/// 0: up, 1: up-left, 2:left

void init_lcs(string s, string t) {
    memset(dp, 0, sizeof dp);
    memset(dir, 0, sizeof dp);
    m = s.size(), n = t.size();
    t += t; dir[0][1] = 2;
    for (int i = 1; i <= m; i++)
        for (int j = 1; j <= 2 * n; j++) {
            dp[i][j] = dp[i - 1][j];
            if (s[i - 1] == t[j - 1] && cmax
            (dp[i][j], dp[i - 1][j - 1] + 1))
                dir[i][j] = 1;
            if (cmax(dp[i][j], dp[i][j - 1]))
                dir[i][j] = 2;
        }
}

int get_lcs(int i, int j) {
    int lcs = 0;
    while (i) {
        if (dir[i][j] == 2) j--;
        else if (dir[i][j] == 1) {
            i--; j--; lcs++;
        }
        else i--;
    }
    return lcs;
}

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

int circular_lcs(string s, string t) {
    init_lcs(s, t); int lcs = 0;
    for (int j = 0; j < n; j++) {
        cmax(lcs, get_lcs(m, j + n));
        remove_col(j);
    }
    return lcs;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    string s, t; cin >> s >> t;
    cout << circular_lcs(s, t) << '\n';
}

Subtask #1
68.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 63212 KB Output isn't correct
2 Correct 35 ms 63340 KB Output is correct
3 Correct 35 ms 63212 KB Output is correct
4 Correct 35 ms 63212 KB Output is correct
5 Correct 35 ms 63212 KB Output is correct
6 Incorrect 37 ms 63212 KB Output isn't correct
7 Correct 63 ms 63212 KB Output is correct
8 Incorrect 79 ms 63340 KB Output isn't correct
9 Correct 69 ms 63240 KB Output is correct
10 Correct 61 ms 63212 KB Output is correct
11 Correct 64 ms 63212 KB Output is correct
12 Incorrect 52 ms 63340 KB Output isn't correct
13 Correct 79 ms 63340 KB Output is correct
14 Correct 76 ms 63340 KB Output is correct
15 Correct 86 ms 63308 KB Output is correct
16 Correct 87 ms 63212 KB Output is correct
17 Incorrect 55 ms 63212 KB Output isn't correct
18 Correct 70 ms 63340 KB Output is correct
19 Correct 61 ms 63212 KB Output is correct
20 Incorrect 74 ms 63340 KB Output isn't correct
21 Correct 41 ms 63212 KB Output is correct
22 Correct 46 ms 63212 KB Output is correct
23 Correct 50 ms 63212 KB Output is correct
24 Incorrect 54 ms 63340 KB Output isn't correct
25 Incorrect 59 ms 63340 KB Output isn't correct