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Submission #128096

# Submission time Handle Problem Language Result Execution time Memory
128096 2019-07-10T12:15:45 Z Just_Solve_The_Problem Factories (JOI14_factories) C++11
100 / 100
 2616 ms 272868 KB 
#include "factories.h"
//#include "grader.cpp"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int maxn = (int)5e5 + 7;

int tiktak;
int tin[maxn], tout[maxn];
int lc[20][maxn];
ll h[maxn];
vector<pair<int, int>> gr[maxn];
int numlog[maxn + maxn], pos[maxn], deep[maxn];
vector <int> order;

struct sparse {
	pair<int, int> table[20][maxn + maxn];
	sparse() {} 
	void build() {
		for (int i = 2; i <= order.size(); i++) {
			numlog[i] = numlog[i / 2] + 1;
		}
		for (int i = 0; i <= numlog[order.size()]; i++) {
			for (int j = 0; j < order.size(); j++) {
				if (i == 0) {
					table[i][j] = {deep[order[j]], order[j]};
				} else {
					table[i][j] = min(table[i - 1][j], table[i - 1][min(j + (1 << i - 1), (int)order.size() - 1)]);
				}
			}
		}
	}
	int get(int l, int r) {
		if (l > r) swap(l, r);
		int lg = numlog[r - l + 1];
		return min(table[lg][l], table[lg][r - (1 << lg) + 1]).second;
	}
};
sparse tr;

void dfs(int v, int pr) {
	tin[v] = ++tiktak;
	pos[v] = order.size();
	order.push_back(v);
	for (auto id : gr[v]) {
		int to = id.first;
		int w = id.second;
		if (to == pr) continue;
		h[to] = h[v] + w;
		deep[to] = deep[v] + 1;
		dfs(to, v);
		pos[v] = order.size();
		order.push_back(v);
	}
	tout[v] = tiktak;
}

int lca(int a, int b) {
	return tr.get(pos[a], pos[b]);
}

ll dist(int a, int b) {
	return h[a] + h[b] - 2 * h[lca(a, b)];
}

void Init(int N, int A[], int B[], int D[]) {
	for (int i = 0; i < N - 1; i++) {
		gr[A[i]].push_back({B[i], D[i]});
		gr[B[i]].push_back({A[i], D[i]});
	}
	dfs(0, 0);
	tr.build();
}

ll dp1[maxn], dp2[maxn];
int col[maxn];
vector <int> vec;
int st;

void dfs1(int v, int pr, ll &ans) {
	dp1[v] = dp2[v] = 1e18;
	if (col[v] == 1) dp1[v] = 0;
	if (col[v] == 2) dp2[v] = 0;
	col[v] = 0;
	while (st < vec.size() && tin[vec[st]] <= tout[v]) {
		int to = vec[st]; st++;
		dfs1(to, v, ans);
		dp1[v] = min(dp1[v], dp1[to] + h[to] - h[v]);
		dp2[v] = min(dp2[v], dp2[to] + h[to] - h[v]);
	}
	ans = min(ans, dp1[v] + dp2[v]);
}

long long Query(int S, int X[], int T, int Y[]) {
  ll ans = 1e18;
  for (int i = 0; i < S; i++) {
		vec.push_back(X[i]);
		col[X[i]] = 1;
  }
  for (int i = 0; i < T; i++) {
		vec.push_back(Y[i]);
		col[Y[i]] = 2;
  }
  sort(vec.begin(), vec.end(), [&](const int &A, const int &B) {
		return tin[A] < tin[B];
  });
  for (int i = vec.size() - 2; i >= 0; i--) {
		vec.push_back(lca(vec[i], vec[i + 1]));
  }
  sort(vec.begin(), vec.end(), [&](const int &A, const int &B) {
		return tin[A] < tin[B];
  });
  vec.resize(unique(vec.begin(), vec.end()) - vec.begin());
  st = 1;
  dfs1(vec[0], vec[0], ans);
  vec.clear();
	return ans;
}

Compilation message

factories.cpp: In member function 'void sparse::build()':
factories.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 2; i <= order.size(); i++) {
                   ~~^~~~~~~~~~~~~~~
factories.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < order.size(); j++) {
                    ~~^~~~~~~~~~~~~~
factories.cpp:31:70: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
      table[i][j] = min(table[i - 1][j], table[i - 1][min(j + (1 << i - 1), (int)order.size() - 1)]);
                                                                    ~~^~~
factories.cpp: In function 'void dfs1(int, int, long long int&)':
factories.cpp:88:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while (st < vec.size() && tin[vec[st]] <= tout[v]) {
         ~~~^~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 169080 KB Output is correct
2 Correct 888 ms 177364 KB Output is correct
3 Correct 864 ms 177564 KB Output is correct
4 Correct 879 ms 177428 KB Output is correct
5 Correct 886 ms 177452 KB Output is correct
6 Correct 653 ms 177336 KB Output is correct
7 Correct 850 ms 177276 KB Output is correct
8 Correct 860 ms 177332 KB Output is correct
9 Correct 881 ms 177448 KB Output is correct
10 Correct 651 ms 177368 KB Output is correct
11 Correct 846 ms 177288 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 168840 KB Output is correct
2 Correct 1495 ms 229712 KB Output is correct
3 Correct 1503 ms 230300 KB Output is correct
4 Correct 1307 ms 230400 KB Output is correct
5 Correct 1547 ms 247000 KB Output is correct
6 Correct 1553 ms 231700 KB Output is correct
7 Correct 1043 ms 189152 KB Output is correct
8 Correct 851 ms 190052 KB Output is correct
9 Correct 925 ms 192120 KB Output is correct
10 Correct 1086 ms 190608 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 169080 KB Output is correct
2 Correct 888 ms 177364 KB Output is correct
3 Correct 864 ms 177564 KB Output is correct
4 Correct 879 ms 177428 KB Output is correct
5 Correct 886 ms 177452 KB Output is correct
6 Correct 653 ms 177336 KB Output is correct
7 Correct 850 ms 177276 KB Output is correct
8 Correct 860 ms 177332 KB Output is correct
9 Correct 881 ms 177448 KB Output is correct
10 Correct 651 ms 177368 KB Output is correct
11 Correct 846 ms 177288 KB Output is correct
12 Correct 146 ms 168840 KB Output is correct
13 Correct 1495 ms 229712 KB Output is correct
14 Correct 1503 ms 230300 KB Output is correct
15 Correct 1307 ms 230400 KB Output is correct
16 Correct 1547 ms 247000 KB Output is correct
17 Correct 1553 ms 231700 KB Output is correct
18 Correct 1043 ms 189152 KB Output is correct
19 Correct 851 ms 190052 KB Output is correct
20 Correct 925 ms 192120 KB Output is correct
21 Correct 1086 ms 190608 KB Output is correct
22 Correct 2495 ms 232884 KB Output is correct
23 Correct 2287 ms 235128 KB Output is correct
24 Correct 2501 ms 258440 KB Output is correct
25 Correct 2312 ms 262084 KB Output is correct
26 Correct 2268 ms 256928 KB Output is correct
27 Correct 2616 ms 272868 KB Output is correct
28 Correct 1789 ms 260808 KB Output is correct
29 Correct 2249 ms 256608 KB Output is correct
30 Correct 2252 ms 256188 KB Output is correct
31 Correct 2314 ms 256612 KB Output is correct
32 Correct 1657 ms 207656 KB Output is correct
33 Correct 996 ms 205276 KB Output is correct
34 Correct 1254 ms 201300 KB Output is correct
35 Correct 1245 ms 201340 KB Output is correct
36 Correct 1218 ms 201792 KB Output is correct
37 Correct 1226 ms 201588 KB Output is correct