제출 #968717

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
968717		raphaelp	Collecting Stamps 3 (JOI20_ho_t3)	C++14	100 / 100	497 ms	446960 KiB

ho_t3

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long N, L;
    cin >> N >> L;
    vector<pair<long long, long long>> Tab(N);
    for (long long i = 0; i < N; i++)
        cin >> Tab[i].first;
    for (long long i = 0; i < N; i++)
        cin >> Tab[i].second;
    sort(Tab.begin(), Tab.end());
    vector<vector<vector<vector<long long>>>> dp(N, vector<vector<vector<long long>>>(N, vector<vector<long long>>(N + 2, vector<long long>(2, 12345678900000000))));
    long long maxx = 0;
    dp[0][0][(Tab[0].first <= Tab[0].second) ? 1 : 0][0] = Tab[0].first;
    dp[N - 1][N - 1][(L - Tab[N - 1].first <= Tab[N - 1].second) ? 1 : 0][1] = L - Tab[N - 1].first;
    for (long long i = 0; i < N; i++)
    {
        for (long long left = 0; left < N; left++)
        {
            long long right = (left + N - i) % N;
            for (long long nb = 0; nb <= N; nb++)
            {
                if (nb > i + 1)
                    continue;
                if (min(dp[left][right][nb][0], dp[left][right][nb][1]) == 12345678900000000)
                    continue;
                maxx = max(maxx, nb);
                long long next = (left + 1) % N, dist = (Tab[left].first < Tab[next].first) ? Tab[next].first - Tab[left].first : Tab[next].first + L - Tab[left].first;
                dp[next][right][(dp[left][right][nb][0] + dist > Tab[next].second) ? nb : nb + 1][0] = min(dp[left][right][nb][0] + dist, dp[next][right][(dp[left][right][nb][0] + dist > Tab[next].second) ? nb : nb + 1][0]);
                next = (left + 1) % N, dist = (Tab[right].first < Tab[next].first) ? Tab[next].first - Tab[right].first : Tab[next].first + L - Tab[right].first;
                dp[next][right][(dp[left][right][nb][1] + dist > Tab[next].second) ? nb : nb + 1][0] = min(dp[left][right][nb][1] + dist, dp[next][right][(dp[left][right][nb][1] + dist > Tab[next].second) ? nb : nb + 1][0]);
                next = (right - 1 + N) % N, dist = (Tab[right].first > Tab[next].first) ? Tab[right].first - Tab[next].first : Tab[right].first + L - Tab[next].first;
                dp[left][next][(dp[left][right][nb][1] + dist > Tab[next].second) ? nb : nb + 1][1] = min(dp[left][right][nb][1] + dist, dp[left][next][(dp[left][right][nb][1] + dist > Tab[next].second) ? nb : nb + 1][1]);
                next = (right - 1 + N) % N, dist = (Tab[left].first > Tab[next].first) ? Tab[left].first - Tab[next].first : Tab[left].first + L - Tab[next].first;
                dp[left][next][(dp[left][right][nb][0] + dist > Tab[next].second) ? nb : nb + 1][1] = min(dp[left][right][nb][0] + dist, dp[left][next][(dp[left][right][nb][0] + dist > Tab[next].second) ? nb : nb + 1][1]);
            }
        }
    }
    cout << maxx;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75