답안 #520440

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
520440	2022-01-30T01:55:16 Z	ajpiano	Long Distance Coach (JOI17_coach)	C++17	100 / 100	166 ms	23896 KB

coach

//https://oj.uz/problem/view/JOI17_coach
#include <bits/stdc++.h>

using namespace std;

#define f first
#define s second

typedef long long ll;
typedef pair<ll, ll> pi;

const ll inf = 2e18;

struct line{
    ll m, b;
    ll eval(ll x){
        return m*x+b;
    }
    bool cover(line a, ll l, ll r){
        return eval(l) <= a.eval(l) && eval(r) <= a.eval(r);
    }
    line(){
        m = 0; b = inf;
    }
};

const int mx = 2e5+5;

struct lc{
    lc *c[2]; line S;

    lc(){
        c[0] = c[1] = NULL; S = line();
    }

    void ex(int i){
        if(!c[i]) c[i] = new lc();
    }

    void add(line X, int l = 0, int r = mx){
        if(X.cover(S,l,r)){
            swap(X,S);
        }
        if(S.cover(X,l,r)) return;
        if(l == r) return;

        int mid = (l+r)>>1;
        if(X.eval(mid) <= S.eval(mid)) swap(X,S);

        if(X.eval(l) <= S.eval(l)) ex(0), c[0]->add(X,l,mid);
        else ex(1), c[1]->add(X,mid+1,r);
    }

    ll query(int pos, int l = 0, int r = mx){
        ll ans = S.eval(pos);
        int mid = (l+r)>>1;
        if(pos <= mid){
            if(c[0]) ans = min(ans,c[0]->query(pos, l, mid));
        }else{
            if(c[1]) ans = min(ans,c[1]->query(pos, mid+1, r));
        }
        return ans;
    }

}chull;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    //remember to include destination in dp
    //remember to add driver cost
    ll x, w, t; int n,m; cin >> x >> n >> m >> w >> t; //Total time, cities, people, water cost, time interval

    vector<ll> stops(n+1); //where the coach stops
    for(int i = 0; i < n; i++) cin >> stops[i];
    stops[n] = x;
    sort(stops.begin(), stops.end());

    vector<pi> passengers(m+1); // water time, refund cost
    for(int i = 1; i <= m; i++) cin >> passengers[i].f >> passengers[i].s;
    sort(passengers.begin(), passengers.end());

    //find from where you can go back on a passenger
    vector<int> goback(m+1,-1);
    for(int i = n; i >= 0; i--){
        ll pos = stops[i]%t;
        pi fnd = {pos,0};
        int cur = lower_bound(passengers.begin(), passengers.end(), fnd) - passengers.begin()-1; //passenger you can go back from
        goback[cur] = i;
    }

    //find coefficient for each stop
    vector<ll> coe(n+1);
    for(int i = 0; i <= n; i++) coe[i] = w*(stops[i]/t);

    //find full cost for each passenger
    vector<ll> cost(m+1);
    for(int i = 0; i <= m; i++){
        cost[i] = w*((x-passengers[i].f)/t+1LL)-passengers[i].s;
    }

    ll ans = 0;
    //assume you refund everyone
    for(int i = 0; i <= m; i++) ans += passengers[i].s;
    //add driver cost
    ans += cost[0];

    vector<ll> dp(m+2);

    //do dp
    for(int i = m; i > 0; i--){
        dp[i] = cost[i]+dp[i+1];
        if(goback[i] != -1){
            ll m1 = coe[goback[i]];
            ll b1 = dp[i+1] - m1*(ll)(m-i-1);
            line cur; cur.m = m1, cur.b = b1;
            chull.add(cur,0,m);
        }
        dp[i] = min(dp[i], chull.query(m-i,0,m));
    }

    //give ans
    cout << ans+dp[1] << "\n";
    return 0;
}

Subtask #1
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	0 ms	204 KB	Output is correct
17	Correct	0 ms	204 KB	Output is correct
18	Correct	0 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	0 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	0 ms	204 KB	Output is correct
17	Correct	0 ms	204 KB	Output is correct
18	Correct	0 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	0 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	0 ms	204 KB	Output is correct
24	Correct	0 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	0 ms	204 KB	Output is correct
28	Correct	0 ms	204 KB	Output is correct
29	Correct	0 ms	204 KB	Output is correct
30	Correct	0 ms	312 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	0 ms	204 KB	Output is correct
33	Correct	0 ms	204 KB	Output is correct
34	Correct	1 ms	204 KB	Output is correct
35	Correct	1 ms	204 KB	Output is correct
36	Correct	1 ms	204 KB	Output is correct
37	Correct	0 ms	204 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	0 ms	204 KB	Output is correct
17	Correct	0 ms	204 KB	Output is correct
18	Correct	0 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	0 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	0 ms	204 KB	Output is correct
24	Correct	0 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	0 ms	204 KB	Output is correct
28	Correct	0 ms	204 KB	Output is correct
29	Correct	0 ms	204 KB	Output is correct
30	Correct	0 ms	312 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	0 ms	204 KB	Output is correct
33	Correct	0 ms	204 KB	Output is correct
34	Correct	1 ms	204 KB	Output is correct
35	Correct	1 ms	204 KB	Output is correct
36	Correct	1 ms	204 KB	Output is correct
37	Correct	0 ms	204 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	2 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	1 ms	332 KB	Output is correct
42	Correct	1 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	1 ms	460 KB	Output is correct
47	Correct	1 ms	332 KB	Output is correct
48	Correct	1 ms	332 KB	Output is correct
49	Correct	1 ms	332 KB	Output is correct
50	Correct	1 ms	332 KB	Output is correct
51	Correct	1 ms	332 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	0 ms	204 KB	Output is correct
17	Correct	0 ms	204 KB	Output is correct
18	Correct	0 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	0 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	0 ms	204 KB	Output is correct
24	Correct	0 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	0 ms	204 KB	Output is correct
28	Correct	0 ms	204 KB	Output is correct
29	Correct	0 ms	204 KB	Output is correct
30	Correct	0 ms	312 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	0 ms	204 KB	Output is correct
33	Correct	0 ms	204 KB	Output is correct
34	Correct	1 ms	204 KB	Output is correct
35	Correct	1 ms	204 KB	Output is correct
36	Correct	1 ms	204 KB	Output is correct
37	Correct	0 ms	204 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	2 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	1 ms	332 KB	Output is correct
42	Correct	1 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	1 ms	460 KB	Output is correct
47	Correct	1 ms	332 KB	Output is correct
48	Correct	1 ms	332 KB	Output is correct
49	Correct	1 ms	332 KB	Output is correct
50	Correct	1 ms	332 KB	Output is correct
51	Correct	1 ms	332 KB	Output is correct
52	Correct	143 ms	11852 KB	Output is correct
53	Correct	152 ms	18624 KB	Output is correct
54	Correct	106 ms	15408 KB	Output is correct
55	Correct	107 ms	15552 KB	Output is correct
56	Correct	106 ms	15880 KB	Output is correct
57	Correct	109 ms	15672 KB	Output is correct
58	Correct	105 ms	16200 KB	Output is correct
59	Correct	106 ms	15568 KB	Output is correct
60	Correct	108 ms	15364 KB	Output is correct
61	Correct	108 ms	15548 KB	Output is correct
62	Correct	112 ms	15556 KB	Output is correct
63	Correct	106 ms	23896 KB	Output is correct
64	Correct	92 ms	16320 KB	Output is correct
65	Correct	141 ms	18456 KB	Output is correct
66	Correct	143 ms	17960 KB	Output is correct
67	Correct	144 ms	18504 KB	Output is correct
68	Correct	141 ms	18568 KB	Output is correct
69	Correct	160 ms	17420 KB	Output is correct
70	Correct	156 ms	17480 KB	Output is correct
71	Correct	149 ms	17428 KB	Output is correct
72	Correct	144 ms	17344 KB	Output is correct
73	Correct	142 ms	17284 KB	Output is correct
74	Correct	166 ms	16964 KB	Output is correct
75	Correct	154 ms	16568 KB	Output is correct
76	Correct	137 ms	16460 KB	Output is correct
77	Correct	114 ms	15940 KB	Output is correct
78	Correct	111 ms	16144 KB	Output is correct
79	Correct	147 ms	16968 KB	Output is correct
80	Correct	142 ms	16964 KB	Output is correct

답안 #520440

Compilation message

Subtask #1 16.0 / 16.0

Subtask #2 30.0 / 30.0

Subtask #3 25.0 / 25.0

Subtask #4 29.0 / 29.0

Subtask #1
16.0 / 16.0

Subtask #2
30.0 / 30.0

Subtask #3
25.0 / 25.0

Subtask #4
29.0 / 29.0