oj.uz

Submission #147012

# Submission time Handle Problem Language Result Execution time Memory
147012 2019-08-27T05:37:06 Z gs14004 City Mapping (NOI18_citymapping) C++17
85.07 / 100
 35 ms 8568 KB 
#include "citymapping.h"
#include <bits/stdc++.h>
#define sz(v) ((int)(v).size())
using namespace std;
using lint = long long;
using pi = pair<lint, lint>;
const int MAXN = 1005;
 
lint mem[MAXN][MAXN];
 
lint dist(int x, int y){
	if(x == y) return 0;
	if(mem[x][y]) return mem[x][y];
	return mem[x][y] = mem[y][x] = get_distance(x, y);
}
 
vector<pi> gph[MAXN];
lint dep[MAXN];
bool vis[MAXN];
vector<int> dfn;
int sz[MAXN], msz[MAXN], par[MAXN];
 
void dfs(int x, int p){
	sz[x] = 1;
	msz[x] = 0;
	for(auto &i : gph[x]){
		if(!vis[i.second] && i.second != p){
			dfs(i.second, x);
			sz[x] += sz[i.second];
			msz[x] = max(msz[x], sz[i.second]);
		}
	}
	dfn.push_back(x);
}
 
int get_center(int v){
	dfn.clear();
	dfs(v, -1);
	pi ret(1e9, -1);
	for(auto &i : dfn){
		pi ans = pi(max(sz(dfn) - sz[i], msz[i]), i);
		ret = min(ret, ans);
	}
	return ret.second;
}
 
void find_roads(int N, int Q, int A[], int B[], int W[]) {
	auto make_edge = [&](int s, int e, int x){
//		printf("make_edge(%d, %d, %d)\n", s, e, x);
		gph[s].emplace_back(x, e);
		gph[e].emplace_back(x, s);
		for(int i=0; i<N-1; i++){
			if(!W[i]){
				tie(A[i], B[i], W[i]) = make_tuple(s, e, x);
				break;
			}
		}
	};
	vector<pi> v;
	for(int i=2; i<=N; i++){
		dep[i] = dist(1, i);
		v.emplace_back(dep[i], i);
	}
	sort(v.begin(), v.end());
	vector<int> prv = {1};
	for(auto &i : v){
		if(sz(prv) == 1){
			par[i.second] = 1;
			make_edge(1, i.second, i.first);
			prv.push_back(i.second);
			continue;
		}
		memset(vis, 0, sizeof(vis));
		int cur_check = 1;
		pi lowest(dep[1], 1);
		while(cur_check && !vis[cur_check]){
			int c = get_center(cur_check);
			vis[c] = 1;
			vector<int> sons;
			for(auto &j : gph[c]){
				if(!vis[j.second] && dep[j.second] > dep[c]){
					sons.push_back(j.second);
				}
			}
			if(sons.empty()){
				if(dist(1, c) + dist(c, i.second) == dist(1, i.second)){
					lowest = max(lowest, pi(dep[c], c));
					break;
				}
				else cur_check = par[c];
				continue;
			}
			int next_trial = sons[0];
			lint d1 = dep[next_trial];
			lint d2 = dist(next_trial, i.second);
			lint d3 = dep[i.second];
			if(d1 + d2 == d3){
				lowest = max(lowest, pi(dep[next_trial], next_trial));
				cur_check = next_trial;
				continue;
			}
			lint branch = (d1 + d2 - d3) / 2;
			if(d1 - branch < dep[c]){
				cur_check = par[c];
				while(d1 - branch < dep[cur_check]){
					vis[cur_check] = 1;
					cur_check = par[cur_check];
				}
			}
			else{
				lowest = max(lowest, pi(dep[c], c));
				if(sz(sons) >= 2){
					cur_check = sons[1];
				}
				if(sz(sons) == 3){
					if(dist(1, sons[2]) + dist(sons[2], i.second) == dist(1, i.second)){
						cur_check = sons[2];
					}
				}
			}
		}
		make_edge(lowest.second, i.second, dist(lowest.second, i.second));
		par[i.second] = lowest.second;
		prv.push_back(i.second);
	}
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 8440 KB Correct: 8705 out of 500000 queries used.
2 Correct 32 ms 8444 KB Correct: 9050 out of 500000 queries used.
3 Correct 27 ms 8316 KB Correct: 7306 out of 500000 queries used.
4 Correct 26 ms 8440 KB Correct: 7723 out of 500000 queries used.
5 Correct 30 ms 8440 KB Correct: 7432 out of 500000 queries used.

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 8440 KB Correct: 8705 out of 500000 queries used.
2 Correct 32 ms 8444 KB Correct: 9050 out of 500000 queries used.
3 Correct 27 ms 8316 KB Correct: 7306 out of 500000 queries used.
4 Correct 26 ms 8440 KB Correct: 7723 out of 500000 queries used.
5 Correct 30 ms 8440 KB Correct: 7432 out of 500000 queries used.
6 Correct 32 ms 8440 KB Correct: 8688 out of 500000 queries used.
7 Correct 30 ms 8440 KB Correct: 7958 out of 500000 queries used.
8 Correct 27 ms 8440 KB Correct: 7147 out of 500000 queries used.
9 Correct 27 ms 8440 KB Correct: 7247 out of 500000 queries used.
10 Correct 30 ms 8440 KB Correct: 7393 out of 500000 queries used.

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 8440 KB Correct: 8635 out of 12000 queries used.
2 Correct 32 ms 8428 KB Correct: 8652 out of 12000 queries used.
3 Correct 35 ms 8440 KB Correct: 8736 out of 12000 queries used.
4 Correct 32 ms 8440 KB Correct: 8646 out of 12000 queries used.
5 Correct 35 ms 8440 KB Correct: 8641 out of 12000 queries used.

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 8440 KB Correct: 8635 out of 12000 queries used.
2 Correct 32 ms 8428 KB Correct: 8652 out of 12000 queries used.
3 Correct 35 ms 8440 KB Correct: 8736 out of 12000 queries used.
4 Correct 32 ms 8440 KB Correct: 8646 out of 12000 queries used.
5 Correct 35 ms 8440 KB Correct: 8641 out of 12000 queries used.
6 Correct 32 ms 8440 KB Correct: 8696 out of 12000 queries used.
7 Correct 34 ms 8424 KB Correct: 8653 out of 12000 queries used.
8 Correct 33 ms 8440 KB Correct: 8721 out of 12000 queries used.
9 Correct 32 ms 8440 KB Correct: 8696 out of 12000 queries used.
10 Correct 32 ms 8440 KB Correct: 8652 out of 12000 queries used.

Subtask #5
28.07 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 8440 KB Correct: 8705 out of 500000 queries used.
2 Correct 32 ms 8444 KB Correct: 9050 out of 500000 queries used.
3 Correct 27 ms 8316 KB Correct: 7306 out of 500000 queries used.
4 Correct 26 ms 8440 KB Correct: 7723 out of 500000 queries used.
5 Correct 30 ms 8440 KB Correct: 7432 out of 500000 queries used.
6 Correct 32 ms 8440 KB Correct: 8688 out of 500000 queries used.
7 Correct 30 ms 8440 KB Correct: 7958 out of 500000 queries used.
8 Correct 27 ms 8440 KB Correct: 7147 out of 500000 queries used.
9 Correct 27 ms 8440 KB Correct: 7247 out of 500000 queries used.
10 Correct 30 ms 8440 KB Correct: 7393 out of 500000 queries used.
11 Correct 32 ms 8440 KB Correct: 8635 out of 12000 queries used.
12 Correct 32 ms 8428 KB Correct: 8652 out of 12000 queries used.
13 Correct 35 ms 8440 KB Correct: 8736 out of 12000 queries used.
14 Correct 32 ms 8440 KB Correct: 8646 out of 12000 queries used.
15 Correct 35 ms 8440 KB Correct: 8641 out of 12000 queries used.
16 Correct 32 ms 8440 KB Correct: 8696 out of 12000 queries used.
17 Correct 34 ms 8424 KB Correct: 8653 out of 12000 queries used.
18 Correct 33 ms 8440 KB Correct: 8721 out of 12000 queries used.
19 Correct 32 ms 8440 KB Correct: 8696 out of 12000 queries used.
20 Correct 32 ms 8440 KB Correct: 8652 out of 12000 queries used.
21 Correct 32 ms 8432 KB Correct: 8674 out of 25000 queries used.
22 Correct 31 ms 8440 KB Correct: 7992 out of 25000 queries used.
23 Correct 30 ms 8440 KB Correct: 7808 out of 25000 queries used.
24 Correct 31 ms 8440 KB Correct: 7812 out of 25000 queries used.
25 Correct 30 ms 8440 KB Correct: 7225 out of 25000 queries used.
26 Correct 28 ms 8444 KB Correct: 7221 out of 25000 queries used.
27 Correct 27 ms 8412 KB Correct: 7185 out of 25000 queries used.
28 Correct 27 ms 8440 KB Correct: 7149 out of 25000 queries used.
29 Correct 27 ms 8440 KB Correct: 7064 out of 25000 queries used.
30 Correct 27 ms 8440 KB Correct: 7186 out of 25000 queries used.
31 Correct 28 ms 8440 KB Correct: 7345 out of 25000 queries used.
32 Correct 32 ms 8440 KB Correct: 8649 out of 25000 queries used.
33 Correct 27 ms 8440 KB Correct: 7228 out of 25000 queries used.
34 Correct 27 ms 8440 KB Correct: 7327 out of 25000 queries used.
35 Correct 27 ms 8452 KB Correct: 7238 out of 25000 queries used.
36 Correct 26 ms 8312 KB Correct: 7262 out of 25000 queries used.
37 Correct 29 ms 8440 KB Correct: 7296 out of 25000 queries used.
38 Correct 27 ms 8440 KB Correct: 7211 out of 25000 queries used.
39 Correct 26 ms 8440 KB Correct: 7310 out of 25000 queries used.
40 Correct 26 ms 8440 KB Correct: 7216 out of 25000 queries used.
41 Correct 27 ms 8440 KB Correct: 7187 out of 25000 queries used.
42 Correct 27 ms 8440 KB Correct: 7254 out of 25000 queries used.
43 Correct 32 ms 8440 KB Correct: 8688 out of 25000 queries used.
44 Correct 26 ms 8440 KB Correct: 7227 out of 25000 queries used.
45 Correct 26 ms 8312 KB Correct: 7211 out of 25000 queries used.
46 Correct 26 ms 8376 KB Correct: 7161 out of 25000 queries used.
47 Correct 27 ms 8444 KB Correct: 7258 out of 25000 queries used.
48 Correct 26 ms 8440 KB Correct: 7200 out of 25000 queries used.
49 Correct 27 ms 8440 KB Correct: 7264 out of 25000 queries used.
50 Correct 26 ms 8440 KB Correct: 7210 out of 25000 queries used.
51 Correct 27 ms 8340 KB Correct: 7224 out of 25000 queries used.
52 Correct 27 ms 8412 KB Correct: 7276 out of 25000 queries used.
53 Correct 27 ms 8440 KB Correct: 7268 out of 25000 queries used.
54 Correct 30 ms 8544 KB Correct: 7842 out of 25000 queries used.
55 Correct 27 ms 8440 KB Correct: 7252 out of 25000 queries used.
56 Correct 27 ms 8440 KB Correct: 7242 out of 25000 queries used.
57 Correct 28 ms 8568 KB Correct: 7288 out of 25000 queries used.
58 Correct 26 ms 8312 KB Correct: 7231 out of 25000 queries used.
59 Correct 26 ms 8444 KB Correct: 7226 out of 25000 queries used.
60 Correct 29 ms 8440 KB Correct: 7359 out of 25000 queries used.
61 Correct 30 ms 8312 KB Correct: 7348 out of 25000 queries used.
62 Correct 29 ms 8312 KB Correct: 7316 out of 25000 queries used.
63 Correct 30 ms 8440 KB Correct: 7377 out of 25000 queries used.
64 Correct 29 ms 8440 KB Correct: 7287 out of 25000 queries used.
65 Correct 28 ms 8440 KB Correct: 7681 out of 25000 queries used.
66 Correct 30 ms 8492 KB Correct: 7378 out of 25000 queries used.
67 Correct 31 ms 8412 KB Correct: 7973 out of 25000 queries used.
68 Correct 30 ms 8312 KB Correct: 7729 out of 25000 queries used.
69 Correct 30 ms 8440 KB Correct: 7784 out of 25000 queries used.
70 Correct 31 ms 8412 KB Correct: 7749 out of 25000 queries used.