oj.uz

Submission #200626

# Submission time Handle Problem Language Result Execution time Memory
200626 2020-02-07T16:22:37 Z wilwxk City Mapping (NOI18_citymapping) C++14
57 / 100
 16 ms 7160 KB 
#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MAXN = 1e3+5;
ll dist[MAXN][MAXN];
vector<tuple<int, int, int> > ans;
vector<int> subtree[MAXN];
ll further[MAXN][2];
mt19937 rng(time(0));
int n;

ll query(int a, int b) {
	if(a == b) return 0;
	if(a > b) swap(a, b);
	if(dist[a][b]) return dist[a][b];
	// printf("query %d %d\n", a, b);
	return dist[a][b] = get_distance(a, b);
}

void solve(int cur) {
	if(subtree[cur].size() == 1) return;
	int x = further[cur][0];
	int y = x;
	for(auto vertex : subtree[cur]) if(query(x, vertex) > query(x, y)) y = vertex;
	// printf("solve %d >> %d %d\n", cur, x, y); for(auto vertex : subtree[cur]) printf("%d ", vertex); cout << endl;

	vector<pair<ll, int> > line;
	vector<pair<ll, int> > aux;
	for(int vertex : subtree[cur]) {
		ll val = query(x, vertex) + query(y, vertex) - query(x, y); val /= 2;
		if(val == 0) line.push_back({query(x, vertex), vertex});
		val = query(x, y) - query(vertex, y) + val;
		aux.push_back({val, vertex});
	}
	sort(line.begin(), line.end());
	sort(aux.begin(), aux.end());
	subtree[cur].clear();
	further[cur][0] = 0;
	further[cur][1] = -1;

	int p = 0;
	for(int i = 0; i < line.size(); i++) {
		int vertex = line[i].second;
		ll dx = line[i].first;
		while(p < aux.size() && aux[p].first == dx) {
			ll val = query(x, aux[p].second) - dx;
			if(val > further[vertex][1]) further[vertex][0] = aux[p].second, further[vertex][1] = val;
			subtree[vertex].push_back(aux[p++].second);
		}
		if(i != 0) ans.push_back({vertex, line[i-1].second, line[i].first-line[i-1].first});
	}

	for(auto item : line) solve(item.second);
}

void find_roads(int N, int Q, int A[], int B[], int W[]) {
	n = N;

	int ori = rng()%n +1;
	for(int i = 1; i <= n; i++) subtree[ori].push_back(i);
	for(int i = 1; i <= n; i++) if(query(ori, i) > further[ori][1]) further[ori][0] = i, further[ori][1] = query(ori, i);
	solve(ori);

	for(int i = 0; i < ans.size(); i++) tie(A[i], B[i], W[i]) = ans[i];
}

Compilation message

citymapping.cpp: In function 'void solve(int)':
citymapping.cpp:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < line.size(); i++) {
                 ~~^~~~~~~~~~~~~
citymapping.cpp:47:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(p < aux.size() && aux[p].first == dx) {
         ~~^~~~~~~~~~~~
citymapping.cpp: In function 'void find_roads(int, int, int*, int*, int*)':
citymapping.cpp:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < ans.size(); i++) tie(A[i], B[i], W[i]) = ans[i];
                 ~~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 3064 KB Correct: 2991 out of 500000 queries used.
2 Correct 9 ms 4856 KB Correct: 3492 out of 500000 queries used.
3 Correct 10 ms 5112 KB Correct: 6758 out of 500000 queries used.
4 Correct 11 ms 5368 KB Correct: 7646 out of 500000 queries used.
5 Correct 12 ms 6648 KB Correct: 12071 out of 500000 queries used.

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 3064 KB Correct: 2991 out of 500000 queries used.
2 Correct 9 ms 4856 KB Correct: 3492 out of 500000 queries used.
3 Correct 10 ms 5112 KB Correct: 6758 out of 500000 queries used.
4 Correct 11 ms 5368 KB Correct: 7646 out of 500000 queries used.
5 Correct 12 ms 6648 KB Correct: 12071 out of 500000 queries used.
6 Correct 10 ms 5752 KB Correct: 2982 out of 500000 queries used.
7 Correct 13 ms 7160 KB Correct: 20997 out of 500000 queries used.
8 Correct 12 ms 6776 KB Correct: 6894 out of 500000 queries used.
9 Correct 11 ms 6264 KB Correct: 8032 out of 500000 queries used.
10 Correct 11 ms 6136 KB Correct: 7619 out of 500000 queries used.

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5752 KB Correct: 2967 out of 12000 queries used.
2 Correct 8 ms 2680 KB Correct: 2973 out of 12000 queries used.
3 Correct 9 ms 3960 KB Correct: 2994 out of 12000 queries used.
4 Correct 7 ms 2680 KB Correct: 2973 out of 12000 queries used.
5 Correct 9 ms 5112 KB Correct: 2967 out of 12000 queries used.

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5752 KB Correct: 2967 out of 12000 queries used.
2 Correct 8 ms 2680 KB Correct: 2973 out of 12000 queries used.
3 Correct 9 ms 3960 KB Correct: 2994 out of 12000 queries used.
4 Correct 7 ms 2680 KB Correct: 2973 out of 12000 queries used.
5 Correct 9 ms 5112 KB Correct: 2967 out of 12000 queries used.
6 Correct 11 ms 6392 KB Correct: 2988 out of 12000 queries used.
7 Correct 10 ms 5880 KB Correct: 2982 out of 12000 queries used.
8 Correct 10 ms 5624 KB Correct: 2994 out of 12000 queries used.
9 Correct 9 ms 3960 KB Correct: 2985 out of 12000 queries used.
10 Correct 8 ms 3448 KB Correct: 2976 out of 12000 queries used.

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 3064 KB Correct: 2991 out of 500000 queries used.
2 Correct 9 ms 4856 KB Correct: 3492 out of 500000 queries used.
3 Correct 10 ms 5112 KB Correct: 6758 out of 500000 queries used.
4 Correct 11 ms 5368 KB Correct: 7646 out of 500000 queries used.
5 Correct 12 ms 6648 KB Correct: 12071 out of 500000 queries used.
6 Correct 10 ms 5752 KB Correct: 2982 out of 500000 queries used.
7 Correct 13 ms 7160 KB Correct: 20997 out of 500000 queries used.
8 Correct 12 ms 6776 KB Correct: 6894 out of 500000 queries used.
9 Correct 11 ms 6264 KB Correct: 8032 out of 500000 queries used.
10 Correct 11 ms 6136 KB Correct: 7619 out of 500000 queries used.
11 Correct 11 ms 5752 KB Correct: 2967 out of 12000 queries used.
12 Correct 8 ms 2680 KB Correct: 2973 out of 12000 queries used.
13 Correct 9 ms 3960 KB Correct: 2994 out of 12000 queries used.
14 Correct 7 ms 2680 KB Correct: 2973 out of 12000 queries used.
15 Correct 9 ms 5112 KB Correct: 2967 out of 12000 queries used.
16 Correct 11 ms 6392 KB Correct: 2988 out of 12000 queries used.
17 Correct 10 ms 5880 KB Correct: 2982 out of 12000 queries used.
18 Correct 10 ms 5624 KB Correct: 2994 out of 12000 queries used.
19 Correct 9 ms 3960 KB Correct: 2985 out of 12000 queries used.
20 Correct 8 ms 3448 KB Correct: 2976 out of 12000 queries used.
21 Correct 8 ms 3320 KB Correct: 2982 out of 25000 queries used.
22 Correct 10 ms 5240 KB Correct: 6738 out of 25000 queries used.
23 Correct 9 ms 4600 KB Correct: 3539 out of 25000 queries used.
24 Correct 10 ms 6524 KB Correct: 4916 out of 25000 queries used.
25 Correct 12 ms 7160 KB Correct: 6923 out of 25000 queries used.
26 Correct 10 ms 5496 KB Correct: 6681 out of 25000 queries used.
27 Correct 11 ms 5880 KB Correct: 6744 out of 25000 queries used.
28 Correct 16 ms 6008 KB Correct: 7073 out of 25000 queries used.
29 Correct 11 ms 6264 KB Correct: 7288 out of 25000 queries used.
30 Correct 11 ms 6008 KB Correct: 7603 out of 25000 queries used.
31 Correct 11 ms 6648 KB Correct: 7712 out of 25000 queries used.
32 Correct 9 ms 4984 KB Correct: 2979 out of 25000 queries used.
33 Correct 11 ms 6392 KB Correct: 7711 out of 25000 queries used.
34 Correct 11 ms 6904 KB Correct: 7684 out of 25000 queries used.
35 Correct 12 ms 6776 KB Correct: 7692 out of 25000 queries used.
36 Correct 11 ms 6136 KB Correct: 7764 out of 25000 queries used.
37 Correct 11 ms 6136 KB Correct: 7639 out of 25000 queries used.
38 Correct 11 ms 6264 KB Correct: 7792 out of 25000 queries used.
39 Correct 12 ms 7032 KB Correct: 7672 out of 25000 queries used.
40 Correct 11 ms 6136 KB Correct: 7742 out of 25000 queries used.
41 Correct 11 ms 6392 KB Correct: 7692 out of 25000 queries used.
42 Correct 12 ms 6904 KB Correct: 7701 out of 25000 queries used.
43 Correct 11 ms 4600 KB Correct: 2988 out of 25000 queries used.
44 Correct 12 ms 6264 KB Correct: 7626 out of 25000 queries used.
45 Correct 12 ms 6960 KB Correct: 7618 out of 25000 queries used.
46 Correct 11 ms 5880 KB Correct: 7618 out of 25000 queries used.
47 Correct 11 ms 6264 KB Correct: 7696 out of 25000 queries used.
48 Correct 12 ms 6776 KB Correct: 7710 out of 25000 queries used.
49 Correct 12 ms 6136 KB Correct: 7698 out of 25000 queries used.
50 Correct 12 ms 6776 KB Correct: 7721 out of 25000 queries used.
51 Correct 12 ms 6908 KB Correct: 7706 out of 25000 queries used.
52 Correct 11 ms 6264 KB Correct: 7686 out of 25000 queries used.
53 Correct 11 ms 6520 KB Correct: 8008 out of 25000 queries used.
54 Correct 15 ms 6776 KB Correct: 22612 out of 25000 queries used.
55 Correct 12 ms 6008 KB Correct: 7701 out of 25000 queries used.
56 Correct 12 ms 6904 KB Correct: 7762 out of 25000 queries used.
57 Correct 12 ms 6648 KB Correct: 8072 out of 25000 queries used.
58 Correct 11 ms 6648 KB Correct: 7628 out of 25000 queries used.
59 Correct 11 ms 6268 KB Correct: 7636 out of 25000 queries used.
60 Correct 11 ms 6012 KB Correct: 8844 out of 25000 queries used.
61 Correct 11 ms 6136 KB Correct: 8338 out of 25000 queries used.
62 Correct 11 ms 6264 KB Correct: 7758 out of 25000 queries used.
63 Correct 11 ms 6264 KB Correct: 8376 out of 25000 queries used.
64 Correct 12 ms 7032 KB Correct: 7948 out of 25000 queries used.
65 Correct 11 ms 6776 KB Correct: 10760 out of 25000 queries used.
66 Correct 13 ms 5880 KB Correct: 7833 out of 25000 queries used.
67 Correct 9 ms 4856 KB Correct: 3851 out of 25000 queries used.
68 Incorrect 13 ms 6392 KB Too many calls to get_distance().
69 Halted 0 ms 0 KB -