제출 #584538

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
584538		drdilyor	Pinball (JOI14_pinball)	C++17	0 / 100	0 ms	212 KiB

pinball

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
#ifdef ONPC
    #include "t_debug.cpp"
#else
    #define debug(...) 42
#endif
#define allit(a) (a).begin(), (a).end()
#define sz(a) ((int) (a).size())
#define cut(s) {cout << s << '\n'; return 0;}

using namespace std;
using ll = long long;
using vi = vector<int>;
namespace pd = __gnu_pbds;
template<typename K> using ordered_set = pd::tree<K, pd::null_type, less<K>, pd::rb_tree_tag, pd::tree_order_statistics_node_update>;
template<typename... T> using hash_table = pd::gp_hash_table<T...>;

const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);
const int INF = 1e9;
const ll INFL = 1e18;
const int N = 1000;
const int M = 10;

struct device {
    int left, right, center, cost;
};
ostream& operator <<(ostream& os, device& a) {
    return os << "{" << a.left << "," << a.right << ", " << a.center << " $" << a.cost << "}";
}

int solve() {
    int n, m;
    cin >> m >> n;
    vector<device> dev(m);

    for (int i = 0; i < m; i++) {
        cin >> dev[i].left >> dev[i].right >> dev[i].center >> dev[i].cost;
        dev[i].left--; dev[i].right--; dev[i].center--;
    }

    {
        //compress
        vi values;
        for (int i = 0; i < m; i++) {
            values.push_back(dev[i].left);
            values.push_back(dev[i].right);
            values.push_back(dev[i].center);
        }
        sort(allit(values));
        map<int,int> mapping;
        int key = -1;
        for (int i = 0; i < sz(values); i++) {
            if (i && values[i-1] == values[i])
                continue;
            mapping[values[i]] = ++key;
        }

        for (int i = 0; i < m; i++) {
            dev[i].left = mapping[dev[i].left];
            dev[i].right = mapping[dev[i].right];
            dev[i].center = mapping[dev[i].center];
        }
        n = key+1;
    }

    vector<ll> mnLeft(n+10, INFL), mnRight(n+10, INFL);

    function<ll(int)> dpLeft = [&](int i) {
        ll res = INFL;
        if (dev[i].left == 0) res = (ll)dev[i].cost;
        else {
            for (int b = dev[i].left; b <= dev[i].right; b++)
                res = min(res, mnLeft[b]);
            res += dev[i].cost;
        }
        int c = dev[i].center;
        mnLeft[c] = min(res, mnLeft[c]);
        return res;
    };

    function<ll(int)> dpRight = [&](int i) {
        ll res = INFL;
        if (dev[i].right == n-1) res = dev[i].cost;
        else {
            for (int b = dev[i].left; b <= dev[i].right; b++)
                res = min(res, mnRight[b]);
            res += dev[i].cost;
        }
        int c = dev[i].center;
        mnRight[c] = min(res, mnRight[c]);
        return res;
    };

    ll res = INFL;
    for (int i = 0; i < m; i++) {
        ll l = dpLeft(i), r = dpRight(i);
        if (l < INFL && r < INFL)
            res = min(res, l + r - dev[i].cost);
    }
    cout << (res >= INFL ? -1 : res);

    return 0;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    //cin >> t;
    while (t-- && cin) {
        if (solve()) break;
        #ifdef ONPC
            cout << "____________________" << endl;
        #endif
    }
    return 0;
}

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