Submission #955704

#	Time	Username	Problem	Language	Result	Execution time	Memory
955704		vjudge1	Pinball (JOI14_pinball)	C++17	29 / 100	1047 ms	15520 KiB

pinball

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    ll m, n, i, j, k, a, b, w = 0, r = (1LL << 50);
    cin >> m >> n;
    vector<vector<ll> > v, vv(m), dp, ndp;
    vector<ll> d(m), s(3 * m);
    for (i = 0; i < m; i++)
    {
        cin >> j;
        v.push_back({j - 1, i, -1});
        cin >> j;
        v.push_back({j - 1, i, 1});
        cin >> j;
        v.push_back({j - 1, i, 0});
        cin >> d[i];
    }
    sort(v.begin(), v.end());
    if (v[0][0] || v[3 * m - 1][0] != n - 1)
    {
        cout << -1;
        return 0;
    }
    for (i = 0; i < 3 * m; i++)
    {
        if (!i)
            s[i] = 0;
        else if (v[i][0] > v[i - 1][0])
            s[i] = s[i - 1] + 1;
        else
            s[i] = s[i - 1];
        w = max(w, s[i]);
    }
    for (i = 0; i < 3 * m; i++)
        v[i] = {v[i][1], s[i], v[i][2]};
    sort(v.begin(), v.end());
    for (i = 0; i < m; i++)
        vv[i] = {v[3 * i][1], v[3 * i + 1][1], v[3 * i + 2][1]};
    ndp.resize(w + 1);
    for (i = 0; i <= w; i++)
    {
        ndp[i].resize(i + 1);
        for (j = 0; j <= i; j++)
        {
            if (j == i)
                ndp[i][j] = 0;
            else
                ndp[i][j] = r;
        }
    }
    dp = ndp;
    for (i = m - 1; i >= 0; i--)
    {
        for (j = 0; j <= w; j++)
        {
            for (k = 0; k <= j; k++)
            {
                if (dp[j][k] < r && k <= vv[i][1] && vv[i][1] <= j)
                {
                    a = min(k, vv[i][0]);
                    b = max(j, vv[i][2]);
                    ndp[b][a] = min(ndp[b][a], dp[j][k] + d[i]);
                }
            }
        }
        dp = ndp;
    }
    if (dp[w][0] < r)
        cout << dp[w][0];
    else
        cout << -1;
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49