oj.uz

답안 #206002

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
206002 2020-03-01T20:57:09 Z jasony123123 경주 (Race) (IOI11_race) C++11
100 / 100
 2895 ms 115544 KB 
#include "race.h"

#include <bits/stdc++.h>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define v vector
typedef long long ll;
typedef pair<int, int > pii;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }

// g++ -std=c++11 -Wall -Wextra -O2 -pipe grader.cpp cluedo.cpp -o cluedo && cluedo < grader.in.1

set<pii> adj[200000]; // node, length
int subt_sz[200000];

int dfs_sz(int x, int p) {
	subt_sz[x] = 1;
	for (auto c : adj[x]) if (c.first != p) subt_sz[x] += dfs_sz(c.first, x);
	return subt_sz[x];
}

int getCentroid(int x, int p) {
	dfs_sz(x, p);
	int maxsize = subt_sz[x]/2;
	while (true) {
		int next = -1;
		for (auto c : adj[x]) if (c.first!=p && subt_sz[c.first] > maxsize) {
			next = c.first;
			break;
		}
		if (next == -1) return x;
		p = x, x = next;
	}
	assert(0);
}

int ans = INT_MAX, LN; // min highways, with len = LN

void dfs_subt(int x, int p, int len, int highways, map<int,int> &table){
	if(table.find(len) == table.end()) table[len] = highways;
	else minn(table[len], highways);

	for(auto c : adj[x]) if(c.first != p && len+c.second <= LN)
		dfs_subt(c.first, x, len+c.second, highways+1, table);
}

void dfsSolve(int root) {
	//cout << "initial root = " << root << endl;
	root = getCentroid(root, -1);
	//cout << "centroid  = " << root << endl;


	map<int, multiset<int>> table; // <len, possible highways>
	v<map<int,int>> subdata; // {len, highways}

	for(auto subt : adj[root]){
		subdata.push_back(map<int,int>());
		dfs_subt(subt.first, root, subt.second, 1, subdata.back());
		//cout << "subt " << subt.first << " data " << endl;
	//	for(auto pp : subdata.back())
			//cout << "len " << pp.first << "; highways " << pp.second << endl;

		for(auto pp : subdata.back())
			table[pp.first].insert(pp.second);
	}



	for(auto &subtable : subdata){
		for(auto pp : subtable)
			table[pp.first].erase(table[pp.first].find(pp.second));

		for(auto pp : subtable){
			if(pp.first == LN){
				minn(ans, pp.second);
				//cout << "ans (single) " << pp.second << endl;
			}
			else
				if(table.find(LN-pp.first) != table.end() && table[LN-pp.first].size() > 0){
					minn(ans, pp.second + *table[LN-pp.first].begin());
					//cout << "ans " << (pp.second) << " + " << *table[LN-pp.first].begin() << endl;
				}
		}

		for(auto pp : subtable)
			table[pp.first].insert(pp.second);
	}

	//cout << endl << endl;
	for (auto subt : adj[root]) {
		assert(adj[subt.first].find({root, subt.second}) != adj[subt.first].end());
		adj[subt.first].erase({root, subt.second});
		dfsSolve(subt.first);
	}
}

void add_edge(int a, int b, int c){
	adj[a].insert({b,c});
	adj[b].insert({a,c});
}

int best_path(int N, int K, int H[][2], int L[]){
	FOR(i,0,N-1)
		add_edge(H[i][0], H[i][1], L[i]);

	LN = K;
	dfsSolve(0);
	return (ans == INT_MAX ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 12 ms 9720 KB Output is correct
5 Correct 11 ms 9756 KB Output is correct
6 Correct 11 ms 9720 KB Output is correct
7 Correct 11 ms 9720 KB Output is correct
8 Correct 11 ms 9720 KB Output is correct
9 Correct 11 ms 9720 KB Output is correct
10 Correct 11 ms 9720 KB Output is correct
11 Correct 11 ms 9724 KB Output is correct
12 Correct 11 ms 9720 KB Output is correct
13 Correct 11 ms 9848 KB Output is correct
14 Correct 11 ms 9720 KB Output is correct
15 Correct 11 ms 9720 KB Output is correct
16 Correct 11 ms 9720 KB Output is correct
17 Correct 11 ms 9848 KB Output is correct
18 Correct 11 ms 9720 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 12 ms 9720 KB Output is correct
5 Correct 11 ms 9756 KB Output is correct
6 Correct 11 ms 9720 KB Output is correct
7 Correct 11 ms 9720 KB Output is correct
8 Correct 11 ms 9720 KB Output is correct
9 Correct 11 ms 9720 KB Output is correct
10 Correct 11 ms 9720 KB Output is correct
11 Correct 11 ms 9724 KB Output is correct
12 Correct 11 ms 9720 KB Output is correct
13 Correct 11 ms 9848 KB Output is correct
14 Correct 11 ms 9720 KB Output is correct
15 Correct 11 ms 9720 KB Output is correct
16 Correct 11 ms 9720 KB Output is correct
17 Correct 11 ms 9848 KB Output is correct
18 Correct 11 ms 9720 KB Output is correct
19 Correct 11 ms 9848 KB Output is correct
20 Correct 11 ms 9720 KB Output is correct
21 Correct 14 ms 9976 KB Output is correct
22 Correct 12 ms 9848 KB Output is correct
23 Correct 13 ms 9848 KB Output is correct
24 Correct 15 ms 9848 KB Output is correct
25 Correct 15 ms 10232 KB Output is correct
26 Correct 12 ms 9848 KB Output is correct
27 Correct 12 ms 9848 KB Output is correct
28 Correct 14 ms 10104 KB Output is correct
29 Correct 14 ms 10104 KB Output is correct
30 Correct 15 ms 10232 KB Output is correct
31 Correct 15 ms 10104 KB Output is correct
32 Correct 15 ms 10232 KB Output is correct
33 Correct 15 ms 10232 KB Output is correct
34 Correct 13 ms 9848 KB Output is correct
35 Correct 14 ms 9976 KB Output is correct
36 Correct 14 ms 9848 KB Output is correct
37 Correct 15 ms 10104 KB Output is correct
38 Correct 16 ms 10104 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 12 ms 9720 KB Output is correct
5 Correct 11 ms 9756 KB Output is correct
6 Correct 11 ms 9720 KB Output is correct
7 Correct 11 ms 9720 KB Output is correct
8 Correct 11 ms 9720 KB Output is correct
9 Correct 11 ms 9720 KB Output is correct
10 Correct 11 ms 9720 KB Output is correct
11 Correct 11 ms 9724 KB Output is correct
12 Correct 11 ms 9720 KB Output is correct
13 Correct 11 ms 9848 KB Output is correct
14 Correct 11 ms 9720 KB Output is correct
15 Correct 11 ms 9720 KB Output is correct
16 Correct 11 ms 9720 KB Output is correct
17 Correct 11 ms 9848 KB Output is correct
18 Correct 11 ms 9720 KB Output is correct
19 Correct 497 ms 22264 KB Output is correct
20 Correct 495 ms 22332 KB Output is correct
21 Correct 480 ms 22400 KB Output is correct
22 Correct 519 ms 22392 KB Output is correct
23 Correct 230 ms 22264 KB Output is correct
24 Correct 210 ms 22264 KB Output is correct
25 Correct 310 ms 24824 KB Output is correct
26 Correct 169 ms 26744 KB Output is correct
27 Correct 629 ms 35064 KB Output is correct
28 Correct 591 ms 44024 KB Output is correct
29 Correct 584 ms 43384 KB Output is correct
30 Correct 640 ms 35064 KB Output is correct
31 Correct 638 ms 35064 KB Output is correct
32 Correct 653 ms 34936 KB Output is correct
33 Correct 921 ms 34792 KB Output is correct
34 Correct 431 ms 35476 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 11 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 12 ms 9720 KB Output is correct
5 Correct 11 ms 9756 KB Output is correct
6 Correct 11 ms 9720 KB Output is correct
7 Correct 11 ms 9720 KB Output is correct
8 Correct 11 ms 9720 KB Output is correct
9 Correct 11 ms 9720 KB Output is correct
10 Correct 11 ms 9720 KB Output is correct
11 Correct 11 ms 9724 KB Output is correct
12 Correct 11 ms 9720 KB Output is correct
13 Correct 11 ms 9848 KB Output is correct
14 Correct 11 ms 9720 KB Output is correct
15 Correct 11 ms 9720 KB Output is correct
16 Correct 11 ms 9720 KB Output is correct
17 Correct 11 ms 9848 KB Output is correct
18 Correct 11 ms 9720 KB Output is correct
19 Correct 11 ms 9848 KB Output is correct
20 Correct 11 ms 9720 KB Output is correct
21 Correct 14 ms 9976 KB Output is correct
22 Correct 12 ms 9848 KB Output is correct
23 Correct 13 ms 9848 KB Output is correct
24 Correct 15 ms 9848 KB Output is correct
25 Correct 15 ms 10232 KB Output is correct
26 Correct 12 ms 9848 KB Output is correct
27 Correct 12 ms 9848 KB Output is correct
28 Correct 14 ms 10104 KB Output is correct
29 Correct 14 ms 10104 KB Output is correct
30 Correct 15 ms 10232 KB Output is correct
31 Correct 15 ms 10104 KB Output is correct
32 Correct 15 ms 10232 KB Output is correct
33 Correct 15 ms 10232 KB Output is correct
34 Correct 13 ms 9848 KB Output is correct
35 Correct 14 ms 9976 KB Output is correct
36 Correct 14 ms 9848 KB Output is correct
37 Correct 15 ms 10104 KB Output is correct
38 Correct 16 ms 10104 KB Output is correct
39 Correct 497 ms 22264 KB Output is correct
40 Correct 495 ms 22332 KB Output is correct
41 Correct 480 ms 22400 KB Output is correct
42 Correct 519 ms 22392 KB Output is correct
43 Correct 230 ms 22264 KB Output is correct
44 Correct 210 ms 22264 KB Output is correct
45 Correct 310 ms 24824 KB Output is correct
46 Correct 169 ms 26744 KB Output is correct
47 Correct 629 ms 35064 KB Output is correct
48 Correct 591 ms 44024 KB Output is correct
49 Correct 584 ms 43384 KB Output is correct
50 Correct 640 ms 35064 KB Output is correct
51 Correct 638 ms 35064 KB Output is correct
52 Correct 653 ms 34936 KB Output is correct
53 Correct 921 ms 34792 KB Output is correct
54 Correct 431 ms 35476 KB Output is correct
55 Correct 61 ms 12408 KB Output is correct
56 Correct 37 ms 11000 KB Output is correct
57 Correct 278 ms 22136 KB Output is correct
58 Correct 223 ms 35860 KB Output is correct
59 Correct 1042 ms 59684 KB Output is correct
60 Correct 2895 ms 115544 KB Output is correct
61 Correct 927 ms 38264 KB Output is correct
62 Correct 1148 ms 44536 KB Output is correct
63 Correct 1274 ms 44664 KB Output is correct
64 Correct 2744 ms 80820 KB Output is correct
65 Correct 539 ms 35576 KB Output is correct
66 Correct 1923 ms 47876 KB Output is correct
67 Correct 795 ms 63240 KB Output is correct
68 Correct 1428 ms 60108 KB Output is correct
69 Correct 1389 ms 64452 KB Output is correct
70 Correct 1319 ms 62712 KB Output is correct