oj.uz

답안 #100834

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
100834 2019-03-14T19:48:38 Z RafaelSus 경주 (Race) (IOI11_race) C++14
9 / 100
 3000 ms 13056 KB 
#include <iostream>
#include <algorithm>
#include <vector>
 
using namespace std;
 
int n,k;
bool used[200002], used_1[200002], used_2[200002];
vector<pair<int,int>>g[200002];
int size[200002];
int tree_centroid;
int best[200002];
const int inf = 1e9;
int ans = 1e9;
 
void dfs(int node, int dad = -1)
{
	size[node] = 1;
	for (auto it : g[node])
		if (!used[it.first] && it.first != dad)
		{
			dfs(it.first, node);
			size[node] += size[it.first];
		}
}
 
 
void findcentroid(int v, int p, int flo){
//	used_1[v]=true;
	int zib=0;
	for(auto x:g[v]){
		if(used_2[x.first] || x.first==p)continue;
		if(size[x.first] - 1 >= flo){
			zib++;
			findcentroid(x.first, v, flo);
			break;
		}
	}
	if(zib==0)
		tree_centroid=v;
}
 
void dfs2(int x, int p, int cost, int l, vector<pair<int,int>>&to_ans) {
	if (cost <= k) 
		to_ans.push_back(make_pair(cost, l));
 
	for (auto y : g[x]) {
		if (used_2[y.first] || y.first == p)continue;
		dfs2(y.first, x, cost + y.second, l + 1, to_ans);
	}
}
 
 
int solve(int node) {
	dfs(node);
//	fill(used_1, used_1 + n, false);
	int zibil = size[node] - 1;
	findcentroid(node, -1, zibil / 2);
	node = tree_centroid;
	best[0] = 0;
 
	vector<int>del;
	vector<pair<int, int>>to_ans;
 
	for (auto x : g[node]) {
		int son = x.first;
		if (used_2[son])continue;
		to_ans.clear();
		dfs2(x.first, node, x.second, 1, to_ans);
 
		for (auto it : to_ans)
			ans = min(ans, it.second + best[k - it.first]);
 
 
		for (auto it : to_ans)
		{
			best[it.first] = min(best[it.first], it.second);
			del.push_back(it.first);
		}
	}
	for (auto it : del)
		best[it] = inf;
 
	used_2[node] = true;
 
 
	for (auto it : g[node])
		if (!used_2[it.first])
			ans = min(ans, solve(it.first));
 
	return ans;
}
 
 
int best_path(int N, int _K, int H[][2], int L[])
{
    k = _K;
  	n = N;
    int i;
    for(i=0; i<N-1; ++i)
    {
        int x, y, z;
        x = H[i][0];
        y = H[i][1];
        z = L[i];
 
        g[x].push_back(make_pair(y,z));
        g[y].push_back(make_pair(x,z));
    }
 
    for(i=0; i<=k; ++i) best[i] = inf;
 
    int X = solve(0);
    if(X == inf) return -1;
    return X;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 8 ms 5024 KB Output is correct
7 Correct 6 ms 4992 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 6 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 8 ms 5056 KB Output is correct
17 Correct 6 ms 5120 KB Output is correct
18 Correct 6 ms 5120 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 8 ms 5024 KB Output is correct
7 Correct 6 ms 4992 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 6 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 8 ms 5056 KB Output is correct
17 Correct 6 ms 5120 KB Output is correct
18 Correct 6 ms 5120 KB Output is correct
19 Correct 7 ms 5120 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Correct 15 ms 5120 KB Output is correct
22 Runtime error 16 ms 13056 KB Execution killed with signal 11 (could be triggered by violating memory limits)
23 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 8 ms 5024 KB Output is correct
7 Correct 6 ms 4992 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 6 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 8 ms 5056 KB Output is correct
17 Correct 6 ms 5120 KB Output is correct
18 Correct 6 ms 5120 KB Output is correct
19 Execution timed out 3017 ms 11496 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 8 ms 5024 KB Output is correct
7 Correct 6 ms 4992 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 6 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 8 ms 5056 KB Output is correct
17 Correct 6 ms 5120 KB Output is correct
18 Correct 6 ms 5120 KB Output is correct
19 Correct 7 ms 5120 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Correct 15 ms 5120 KB Output is correct
22 Runtime error 16 ms 13056 KB Execution killed with signal 11 (could be triggered by violating memory limits)
23 Halted 0 ms 0 KB -