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Submission #915868

# Submission time Handle Problem Language Result Execution time Memory
915868 2024-01-24T20:02:39 Z vjudge1 Palindromic Partitions (CEOI17_palindromic) C++14
100 / 100
 72 ms 17144 KB 
# include <bits/stdc++.h>

typedef std::string st;
typedef long long ll;

using namespace std;

ll p[1000006], h[1000006];
ll a, n, l, c, i;
ll h1, h2;

st t;

bool f;

bool check_equal(ll a, ll b, ll l) {
    h1 = (h[a + l - 1] - h[a - 1]) * p[b - a];
    h2 = (h[b + l - 1] - h[b - 1]);

    return h1 == h2;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> a;

    while (a --) {
        cin >> t;

        n = t.size();

        p[0] = 1, p[1] = 47;

        for (i = 2; i < n; i ++) {
            p[i] = p[i - 1] * p[1];
        }

        h[0] = 0;

        for (i = 1; i <= n; i ++) {
            h[i] = h[i - 1] + (t[i - 1] - 'a' + 1) * p[i - 1];
        }

        l = 1, c = 0;

        while (l <= n / 2 + (n % 2)) {
            i = 1, f = false;

            for (; i <= n / 2 - l + 1; i ++) {
                // cout << t.substr(l-1, i) << ' ' << t.substr(n - l - i + 1, i) << '\n';

                if (check_equal(l, n - l - i + 2, i)) {
                    // cout << "fuck you\n";
                    c += 2;
                    l = l + i;
                    f = true;
                    break;
                }
            }

            if (!f) {
                // cout << "HEY\n";
                // cout << l << '\n';
                c ++;
                break;
            }
        }

        cout << c << '\n';
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 2 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 2 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 72 ms 17144 KB Output is correct
15 Correct 40 ms 17144 KB Output is correct
16 Correct 65 ms 17144 KB Output is correct
17 Correct 38 ms 11512 KB Output is correct