Submission #856326

#	Time	Username	Problem	Language	Result	Execution time	Memory
856326		Cyanmond	Palindromic Partitions (CEOI17_palindromic)	C++17	35 / 100	10037 ms	676 KiB

palindromic

#include <bits/stdc++.h>

using namespace std;

#define rep(i, l, r) for (int i = (l); i < (r); ++i)
#define per(i, l, r) for (int i = (r - 1); i >= l; --i)
#define ALL(x) (x).begin(), (x).end()

using i64 = long long;

void main_() {
    string S;
    cin >> S;
    const int N = (int)S.size();

    string A = S.substr(0, N / 2), B = S.substr(N - N / 2, N / 2);
    reverse(ALL(B));
    const int M = (int)A.size();
    vector<int> dp(M + 1, -(2 * N));
    dp[0] = 0;
    rep(i, 0, M) {
        string x, y;
        rep(j, i, M) {
            x += A[j];
            y = B[j] + y;
            if (x == y) {
                dp[j + 1] = max(dp[j + 1], dp[i] + 2);
            }
        }
    }
    for (auto &e : dp) ++e;
    if (N % 2 == 0) --dp[M];

    cout << *max_element(ALL(dp)) << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T;
    cin >> T;
    while (T--) main_();
}

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 0 / 25
• Subtask 4: 0 / 40