oj.uz

답안 #147055

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
147055 2019-08-27T10:31:21 Z gs14004 Sky Walking (IOI19_walk) C++17
100 / 100
 1723 ms 170732 KB 
#include "walk.h"
#include <bits/stdc++.h>
#define sz(v) ((int)(v).size())
using namespace std;
using lint = long long;
using pi = pair<lint, int>;
const int MAXN = 100005;
const int MAXV = 2000005;

struct intv{
	int s, e, x;
	bool operator<(const intv &i)const{
		return x < i.x;
	}
};

struct point{
	int x, y, idx;
};

int n, m;
vector<int> witness[MAXN];
vector<pi> event[MAXN];
vector<pi> gph[MAXV];
lint dist[MAXV];

lint dijkstra(int s, int e){
	priority_queue<pi, vector<pi>, greater<pi> > pq;
	memset(dist, 0x3f, sizeof(dist));
	dist[s] = 0;
	pq.emplace(0, s);
	while(!pq.empty()){
		auto x = pq.top();
		pq.pop();
      if(x.second == e) return x.first;
		if(dist[x.second] != x.first) continue;
		for(auto &j : gph[x.second]){
			if(dist[j.second] > x.first + j.first){
				dist[j.second] = x.first + j.first;
				pq.emplace(dist[j.second], j.second);
			}
		}
	}
  return -1;
}

void add_edge(point x, point y){
	int dist = abs(x.x - y.x) + abs(x.y - y.y);
	gph[x.idx].emplace_back(dist, y.idx);
	gph[y.idx].emplace_back(dist, x.idx);
}

void make_vertex(vector<intv> v){
	for(auto &i : v){
		event[i.s].emplace_back(i.x, +1);
		event[i.e+1].emplace_back(i.x, -1);
	}
	multiset<int> swp;
	for(int i=0; i<n; i++){
		for(auto &j : event[i]){
			if(j.second == +1) swp.insert(j.first);
			else swp.erase(swp.find(j.first));
		}
		vector<int> nxt = witness[i];
		for(auto &j : witness[i]){
			if(j == 0) continue;
			auto l = swp.upper_bound(j);
			if(l != swp.end()) nxt.push_back(*l);
			l = swp.lower_bound(j);
			if(l != swp.begin()) nxt.push_back(*prev(l));
		}
		sort(nxt.begin(), nxt.end());
		nxt.resize(unique(nxt.begin(), nxt.end()) - nxt.begin());
		witness[i] = nxt;
	}
}

long long min_distance(vector<int> x, vector<int> h, vector<int> l, vector<int> r, vector<int> y, int s, int e) {
	n = sz(x);
	m = sz(l);
	for(int i=0; i<m; i++){
		witness[l[i]].push_back(y[i]);
		witness[r[i]].push_back(y[i]);
	}
	witness[s].push_back(0);
	witness[e].push_back(0);
	vector<pi> points;
	vector<intv> hors;
	set<int> alive;
	for(int i=0; i<n; i++){
		points.emplace_back(h[i], i);
		alive.insert(i);
	}
	for(int i=0; i<m; i++) hors.push_back({l[i], r[i], y[i]});
	sort(points.begin(), points.end());
	sort(hors.begin(), hors.end());
	int ptr = 0;
	for(auto &i : hors){
		while(ptr < sz(points) && points[ptr].first < i.x){
			alive.erase(points[ptr++].second);
		}
		if(i.s <= s && s <= i.e){
			auto it = alive.lower_bound(s);
			witness[*it].push_back(i.x);
			if(*it != s) witness[*prev(it)].push_back(i.x);
		}
		if(i.s <= e && e <= i.e){
			auto it = alive.lower_bound(e);
			witness[*it].push_back(i.x);
			if(*it != e) witness[*prev(it)].push_back(i.x);
		}
	}
	make_vertex(hors);
	vector<point> ans;
	for(int i=0; i<n; i++){
		for(auto &j : witness[i]){
			int num = ans.size();
			ans.push_back({x[i], j, num});
		}
	}
	auto cmpx = [&](const point &x, const point &y) { return pi(x.x, x.y) < pi(y.x, y.y); };
	auto cmpy = [&](const point &x, const point &y) { return pi(x.y, x.x) < pi(y.y, y.x); };
	sort(ans.begin(), ans.end(), cmpx);
	for(int i=0; i<n; i++){
		int st = lower_bound(ans.begin(), ans.end(), (point){x[i], 0, -1}, cmpx) - ans.begin();
		int ed = upper_bound(ans.begin(), ans.end(), (point){x[i], h[i], -1}, cmpx) - ans.begin();
		for(int j=st+1; j<ed; j++){
			add_edge(ans[j-1], ans[j]);
		}
	}
	sort(ans.begin(), ans.end(), cmpy);
	for(int i=0; i<m; i++){
		int st = lower_bound(ans.begin(), ans.end(), (point){x[l[i]], y[i], -1}, cmpy) - ans.begin();
		int ed = upper_bound(ans.begin(), ans.end(), (point){x[r[i]], y[i], -1}, cmpy) - ans.begin();
		for(int j=st+1; j<ed; j++){
			add_edge(ans[j-1], ans[j]);
		}
	}
	s = lower_bound(ans.begin(), ans.end(), (point){x[s], 0, -1}, cmpy)->idx;
	e = lower_bound(ans.begin(), ans.end(), (point){x[e], 0, -1}, cmpy)->idx;
	return dijkstra(s, e);
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 63 ms 67704 KB Output is correct
2 Correct 63 ms 67704 KB Output is correct
3 Correct 63 ms 67576 KB Output is correct
4 Correct 63 ms 67580 KB Output is correct
5 Correct 63 ms 67704 KB Output is correct
6 Correct 63 ms 67704 KB Output is correct
7 Correct 64 ms 67644 KB Output is correct
8 Correct 62 ms 67704 KB Output is correct
9 Correct 63 ms 67660 KB Output is correct
10 Correct 69 ms 67756 KB Output is correct
11 Correct 69 ms 67660 KB Output is correct
12 Correct 63 ms 67704 KB Output is correct
13 Correct 63 ms 67688 KB Output is correct
14 Correct 63 ms 67704 KB Output is correct
15 Correct 63 ms 67704 KB Output is correct
16 Correct 64 ms 67576 KB Output is correct
17 Correct 63 ms 67680 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 67704 KB Output is correct
2 Correct 66 ms 67660 KB Output is correct
3 Correct 698 ms 121684 KB Output is correct
4 Correct 920 ms 126524 KB Output is correct
5 Correct 632 ms 113884 KB Output is correct
6 Correct 623 ms 111100 KB Output is correct
7 Correct 628 ms 114092 KB Output is correct
8 Correct 766 ms 125640 KB Output is correct
9 Correct 770 ms 121996 KB Output is correct
10 Correct 947 ms 128836 KB Output is correct
11 Correct 703 ms 111176 KB Output is correct
12 Correct 558 ms 96672 KB Output is correct
13 Correct 989 ms 129668 KB Output is correct
14 Correct 585 ms 102972 KB Output is correct
15 Correct 603 ms 104216 KB Output is correct
16 Correct 589 ms 103900 KB Output is correct
17 Correct 577 ms 102384 KB Output is correct
18 Correct 776 ms 104764 KB Output is correct
19 Correct 78 ms 69448 KB Output is correct
20 Correct 256 ms 84468 KB Output is correct
21 Correct 460 ms 100580 KB Output is correct
22 Correct 502 ms 102628 KB Output is correct
23 Correct 888 ms 110908 KB Output is correct
24 Correct 551 ms 103132 KB Output is correct
25 Correct 556 ms 101500 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 201 ms 79876 KB Output is correct
2 Correct 1031 ms 138092 KB Output is correct
3 Correct 1184 ms 140856 KB Output is correct
4 Correct 1243 ms 150308 KB Output is correct
5 Correct 1552 ms 152956 KB Output is correct
6 Correct 1325 ms 146636 KB Output is correct
7 Correct 679 ms 113892 KB Output is correct
8 Correct 484 ms 102352 KB Output is correct
9 Correct 1317 ms 141100 KB Output is correct
10 Correct 637 ms 114260 KB Output is correct
11 Correct 93 ms 72300 KB Output is correct

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 201 ms 79876 KB Output is correct
2 Correct 1031 ms 138092 KB Output is correct
3 Correct 1184 ms 140856 KB Output is correct
4 Correct 1243 ms 150308 KB Output is correct
5 Correct 1552 ms 152956 KB Output is correct
6 Correct 1325 ms 146636 KB Output is correct
7 Correct 679 ms 113892 KB Output is correct
8 Correct 484 ms 102352 KB Output is correct
9 Correct 1317 ms 141100 KB Output is correct
10 Correct 637 ms 114260 KB Output is correct
11 Correct 93 ms 72300 KB Output is correct
12 Correct 1170 ms 140580 KB Output is correct
13 Correct 1112 ms 145284 KB Output is correct
14 Correct 1533 ms 149064 KB Output is correct
15 Correct 994 ms 133200 KB Output is correct
16 Correct 1118 ms 131952 KB Output is correct
17 Correct 1229 ms 145040 KB Output is correct
18 Correct 991 ms 132956 KB Output is correct
19 Correct 1061 ms 131648 KB Output is correct
20 Correct 737 ms 108256 KB Output is correct
21 Correct 193 ms 77032 KB Output is correct
22 Correct 790 ms 128080 KB Output is correct
23 Correct 775 ms 124504 KB Output is correct
24 Correct 614 ms 108124 KB Output is correct
25 Correct 720 ms 120028 KB Output is correct
26 Correct 544 ms 101624 KB Output is correct
27 Correct 1411 ms 150328 KB Output is correct
28 Correct 1086 ms 144268 KB Output is correct
29 Correct 1608 ms 142196 KB Output is correct
30 Correct 710 ms 109664 KB Output is correct
31 Correct 1351 ms 136540 KB Output is correct
32 Correct 558 ms 107468 KB Output is correct
33 Correct 581 ms 106952 KB Output is correct
34 Correct 775 ms 111744 KB Output is correct
35 Correct 755 ms 112604 KB Output is correct
36 Correct 579 ms 105180 KB Output is correct
37 Correct 479 ms 100540 KB Output is correct
38 Correct 491 ms 102220 KB Output is correct
39 Correct 753 ms 110864 KB Output is correct
40 Correct 548 ms 102800 KB Output is correct
41 Correct 570 ms 101732 KB Output is correct

Subtask #5
43.0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 63 ms 67704 KB Output is correct
2 Correct 63 ms 67704 KB Output is correct
3 Correct 63 ms 67576 KB Output is correct
4 Correct 63 ms 67580 KB Output is correct
5 Correct 63 ms 67704 KB Output is correct
6 Correct 63 ms 67704 KB Output is correct
7 Correct 64 ms 67644 KB Output is correct
8 Correct 62 ms 67704 KB Output is correct
9 Correct 63 ms 67660 KB Output is correct
10 Correct 69 ms 67756 KB Output is correct
11 Correct 69 ms 67660 KB Output is correct
12 Correct 63 ms 67704 KB Output is correct
13 Correct 63 ms 67688 KB Output is correct
14 Correct 63 ms 67704 KB Output is correct
15 Correct 63 ms 67704 KB Output is correct
16 Correct 64 ms 67576 KB Output is correct
17 Correct 63 ms 67680 KB Output is correct
18 Correct 65 ms 67704 KB Output is correct
19 Correct 66 ms 67660 KB Output is correct
20 Correct 698 ms 121684 KB Output is correct
21 Correct 920 ms 126524 KB Output is correct
22 Correct 632 ms 113884 KB Output is correct
23 Correct 623 ms 111100 KB Output is correct
24 Correct 628 ms 114092 KB Output is correct
25 Correct 766 ms 125640 KB Output is correct
26 Correct 770 ms 121996 KB Output is correct
27 Correct 947 ms 128836 KB Output is correct
28 Correct 703 ms 111176 KB Output is correct
29 Correct 558 ms 96672 KB Output is correct
30 Correct 989 ms 129668 KB Output is correct
31 Correct 585 ms 102972 KB Output is correct
32 Correct 603 ms 104216 KB Output is correct
33 Correct 589 ms 103900 KB Output is correct
34 Correct 577 ms 102384 KB Output is correct
35 Correct 776 ms 104764 KB Output is correct
36 Correct 78 ms 69448 KB Output is correct
37 Correct 256 ms 84468 KB Output is correct
38 Correct 460 ms 100580 KB Output is correct
39 Correct 502 ms 102628 KB Output is correct
40 Correct 888 ms 110908 KB Output is correct
41 Correct 551 ms 103132 KB Output is correct
42 Correct 556 ms 101500 KB Output is correct
43 Correct 201 ms 79876 KB Output is correct
44 Correct 1031 ms 138092 KB Output is correct
45 Correct 1184 ms 140856 KB Output is correct
46 Correct 1243 ms 150308 KB Output is correct
47 Correct 1552 ms 152956 KB Output is correct
48 Correct 1325 ms 146636 KB Output is correct
49 Correct 679 ms 113892 KB Output is correct
50 Correct 484 ms 102352 KB Output is correct
51 Correct 1317 ms 141100 KB Output is correct
52 Correct 637 ms 114260 KB Output is correct
53 Correct 93 ms 72300 KB Output is correct
54 Correct 1170 ms 140580 KB Output is correct
55 Correct 1112 ms 145284 KB Output is correct
56 Correct 1533 ms 149064 KB Output is correct
57 Correct 994 ms 133200 KB Output is correct
58 Correct 1118 ms 131952 KB Output is correct
59 Correct 1229 ms 145040 KB Output is correct
60 Correct 991 ms 132956 KB Output is correct
61 Correct 1061 ms 131648 KB Output is correct
62 Correct 737 ms 108256 KB Output is correct
63 Correct 193 ms 77032 KB Output is correct
64 Correct 790 ms 128080 KB Output is correct
65 Correct 775 ms 124504 KB Output is correct
66 Correct 614 ms 108124 KB Output is correct
67 Correct 720 ms 120028 KB Output is correct
68 Correct 544 ms 101624 KB Output is correct
69 Correct 1411 ms 150328 KB Output is correct
70 Correct 1086 ms 144268 KB Output is correct
71 Correct 1608 ms 142196 KB Output is correct
72 Correct 710 ms 109664 KB Output is correct
73 Correct 1351 ms 136540 KB Output is correct
74 Correct 558 ms 107468 KB Output is correct
75 Correct 581 ms 106952 KB Output is correct
76 Correct 775 ms 111744 KB Output is correct
77 Correct 755 ms 112604 KB Output is correct
78 Correct 579 ms 105180 KB Output is correct
79 Correct 479 ms 100540 KB Output is correct
80 Correct 491 ms 102220 KB Output is correct
81 Correct 753 ms 110864 KB Output is correct
82 Correct 548 ms 102800 KB Output is correct
83 Correct 570 ms 101732 KB Output is correct
84 Correct 179 ms 77612 KB Output is correct
85 Correct 1112 ms 142516 KB Output is correct
86 Correct 1631 ms 158008 KB Output is correct
87 Correct 181 ms 81768 KB Output is correct
88 Correct 237 ms 79336 KB Output is correct
89 Correct 183 ms 81896 KB Output is correct
90 Correct 104 ms 71984 KB Output is correct
91 Correct 66 ms 67836 KB Output is correct
92 Correct 95 ms 70792 KB Output is correct
93 Correct 474 ms 97332 KB Output is correct
94 Correct 199 ms 77388 KB Output is correct
95 Correct 858 ms 131704 KB Output is correct
96 Correct 759 ms 125148 KB Output is correct
97 Correct 631 ms 108508 KB Output is correct
98 Correct 690 ms 120220 KB Output is correct
99 Correct 1723 ms 170732 KB Output is correct
100 Correct 1219 ms 146064 KB Output is correct
101 Correct 1452 ms 148260 KB Output is correct
102 Correct 667 ms 109920 KB Output is correct
103 Correct 588 ms 104412 KB Output is correct
104 Correct 647 ms 104740 KB Output is correct
105 Correct 666 ms 108956 KB Output is correct
106 Correct 625 ms 106060 KB Output is correct
107 Correct 708 ms 107612 KB Output is correct
108 Correct 132 ms 73756 KB Output is correct
109 Correct 1073 ms 129620 KB Output is correct
110 Correct 1067 ms 145144 KB Output is correct
111 Correct 1103 ms 144716 KB Output is correct
112 Correct 706 ms 111804 KB Output is correct
113 Correct 783 ms 108872 KB Output is correct