제출 #1095721

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1095721		Zero_OP	Long Distance Coach (JOI17_coach)	C++14	0 / 100	1 ms	600 KiB

coach

#include "bits/stdc++.h"

using namespace std;

#define all(v) begin(v), end(v)
#define compact(v) v.erase(unique(all(v)), end(v))
#define sz(v) (int)v.size()
#define dbg(x) "[" #x " = " << (x) << "]"

template<typename T> bool minimize(T& a, const T& b){
    if(a > b) return a = b, true;
    return false;
}

template<typename T> bool maximize(T& a, const T& b){
    if(a < b) return a = b, true;
    return false;
}

using ll = long long;
using ld = long double;
using vi = vector<int>;
using vl = vector<ll>;

const int MAX = 2e5 + 5;

int X, N, M, W, T, S[MAX], C[MAX], D[MAX];
ll sumC[MAX], dp[MAX];

struct refilling_point{
    int S;
    bool operator < (const refilling_point& other){
        return S < other.S;
    }

} refilling_points[MAX];

struct passenger{
    int D, C;
    bool operator < (const passenger& other){
        return D < other.D;
    }

} passengers[MAX];

const ll inf = 4e18;

struct line{
    ll a, b;
    line(ll a = 0, ll b = 0) : a(a), b(b) {}
    ll eval(ll x){ return a * x + b; }
};

struct LichaoTree{
    int n;
    vector<line> st;

    LichaoTree(int n) : st(n << 2, line(0, inf)) {}

    void update(int id, int l, int r, line d){
        if(l == r){
            if(d.eval(l) < st[id].eval(l)){
                st[id] = d;
            }
        } else{
            int mid = l + r >> 1;
            if(st[id].a < d.a) swap(st[id], d);
            if(st[id].eval(mid) > d.eval(mid)){
                swap(st[id], d);
                update(id << 1, l, mid, d);
            } else{
                update(id << 1 | 1, mid + 1, r, d);
            }
        }
    }

    ll query(int id, int l, int r, int x){
        if(l == r) return st[id].eval(x);
        int mid = l + r >> 1;
        if(x <= mid) return min(st[id].eval(x), query(id << 1, l, mid, x));
        else return min(st[id].eval(x), query(id << 1 | 1, mid + 1, r, x));
    }

    void insertLine(line d){
        update(1, 1, n, d);
    }

    ll query(int x){
        return query(1, 1, n, x);
    }
};


int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

//    #define filename "task"
//    if(fopen(filename".inp", "r")){
//        freopen(filename".inp", "r", stdin);
//        freopen(filename".out", "w", stdout);
//    }

    cin >> X >> N >> M >> W >> T;
    for(int i = 1; i <= N; ++i){
        cin >> refilling_points[i].S;
    }

    for(int i = 1; i <= M; ++i){
        cin >> passengers[i].D >> passengers[i].C;
    }

    sort(refilling_points + 1, refilling_points + 1 + N);
    sort(passengers + 1, passengers + 1 + M);

    ll driver_cost = 1LL * ((X / T) + 1) * W;

    for(int i = 1; i <= M; ++i){
        sumC[i] = sumC[i - 1] + passengers[i].C;
    }

    LichaoTree trick(M);
    refilling_points[++N].S = X;

    for(int i = M, j = N; i >= 1; --i){
        dp[i] = dp[i + 1] + 1ll * W * ((X - passengers[i].D) / T + 1);
        while(j > 0 && (refilling_points[j].S % T) > passengers[i].D){
            line d(-1LL * W * (refilling_points[j].S / T), 1LL * W * (refilling_points[j].S / T) * (i + 1) + sumC[i] + dp[i + 1]);
            trick.insertLine(d);
            --j;
        }

        minimize(dp[i], trick.query(i) - sumC[i - 1]);
    }

    cout << dp[1] + driver_cost << '\n';

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

coach.cpp: In member function 'void LichaoTree::update(int, int, int, line)':
coach.cpp:66:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   66 |             int mid = l + r >> 1;
      |                       ~~^~~
coach.cpp: In member function 'll LichaoTree::query(int, int, int, int)':
coach.cpp:79:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   79 |         int mid = l + r >> 1;
      |                   ~~^~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 29