제출 #955727

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
955727		vjudge1	Pinball (JOI14_pinball)	C++17	51 / 100	1088 ms	3600 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, ma, r = (1LL << 50);
    cin >> m >> n;
    vector<vector<ll> > v, vv(m);
    vector<ll> lp, nlp, nrp, rp;
    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]};
    nlp.resize(w + 1);
    nrp.resize(w + 1);
    for (i = 0; i <= w; i++)
        nlp[i] = nrp[i] = r;
    nlp[0] = nrp[w] = 0;
    lp = nlp;
    rp = nrp;
    ma = r;
    for (i = 0; i < m; i++)
    {
        for (j = vv[i][0]; j <= vv[i][2]; j++)
        {
            if (j < vv[i][1])
            {
                nlp[vv[i][1]] = min(nlp[vv[i][1]], lp[j] + d[i]);
            }
            if (j > vv[i][1])
            {
                nrp[vv[i][1]] = min(nrp[vv[i][1]], rp[j] + d[i]);
            }
        }
        for (j = 1; j <= w; j++)
            rp[j] = min(rp[j], rp[j - 1]);
        for (j = w - 1; j >= 0; j--)
            lp[j] = min(lp[j], lp[j + 1]);
        ma = min(ma, lp[vv[i][0]] + rp[vv[i][2]] + d[i]);
        lp = nlp;
        rp = nrp;
    }
    for (j = 1; j <= w; j++)
        rp[j] = min(rp[j], rp[j - 1]);
    for (j = w - 1; j >= 0; j--)
        lp[j] = min(lp[j], lp[j + 1]);
    for (j = 0; j <= w; j++)
        ma = min(ma, lp[j] + rp[j]);
    if (ma < r)
        cout << ma;
    else
        cout << -1;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

pinball.cpp: In function 'int main()':
pinball.cpp:6:20: warning: unused variable 'k' [-Wunused-variable]
    6 |     ll m, n, i, j, k, a, b, w = 0, ma, r = (1LL << 50);
      |                    ^
pinball.cpp:6:23: warning: unused variable 'a' [-Wunused-variable]
    6 |     ll m, n, i, j, k, a, b, w = 0, ma, r = (1LL << 50);
      |                       ^
pinball.cpp:6:26: warning: unused variable 'b' [-Wunused-variable]
    6 |     ll m, n, i, j, k, a, b, w = 0, ma, r = (1LL << 50);
      |                          ^

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