oj.uz

Submission #573207

# Submission time Handle Problem Language Result Execution time Memory
573207 2022-06-06T09:10:47 Z Arnch Factories (JOI14_factories) C++17
100 / 100
 3359 ms 219844 KB 
#include "factories.h"
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

//#define Sz(x) int((x).size())
//#define All(x) (x).begin(), (x).end()
//#define wtf(x) cout<<#x <<" : " <<x <<endl

const ll inf = 1e18, maxn = 1e6 + 10, Log = 25;

int n, par[maxn][Log], st[maxn], fn[maxn], h[maxn], cnt[maxn], tim;
ll d[maxn], dp[maxn][2], ans;
vector<pair<int, ll> > G[maxn], child[maxn];

bool cmp(int i, int j) {
	return st[i] < st[j];
}
void dfs(int x, int p = 0) {
	st[x] = tim++;
	par[x][0] = p;
	for(int i = 1; i < Log; i++) par[x][i] = par[par[x][i - 1]][i - 1];
	for(auto i : G[x]) {
		if(i.first == p) continue;
		h[i.first] = h[x] + 1, d[i.first] = d[x] + i.second;
		dfs(i.first, x);
	}
	fn[x] = tim++;
}
int get_par(int x, int y) {
	for(int i = 0; i < Log; i++) {
		if((y >> i) & 1) x = par[x][i];
	}
	return x;
}
int lca(int x, int y) {
	if(h[x] > h[y]) swap(x, y);
	y = get_par(y, h[y] - h[x]);
	if(x == y) return x;
	for(int i = Log - 1; i >= 0; i--) {
		if(par[x][i] != par[y][i]) {
			x = par[x][i], y = par[y][i];
		}
	}
	return par[x][0];
}
void main_dfs(int x) {
	dp[x][0] = dp[x][1] = inf;
	if(cnt[x] == 0) dp[x][0] = 0;
	if(cnt[x] == 1) dp[x][1] = 0;
	for(auto i : child[x]) {
		main_dfs(i.first);
		dp[x][0] = min(dp[x][0], dp[i.first][0] + i.second);
		dp[x][1] = min(dp[x][1], dp[i.first][1] + i.second);
	}
	ans = min(ans, dp[x][0] + dp[x][1]);
}
void Init(int N, int A[], int B[], int D[]) {
	n = N;
	for(int i = 0; i < n - 1; i++) {
		G[A[i]].push_back({B[i], D[i]});
		G[B[i]].push_back({A[i], D[i]});
	}
	dfs(0);
	for(int i = 0; i < n; i++) cnt[i] = -1;
}
long long Query(int S, int X[], int T, int Y[]) {
	vector<int> vc;
	for(int i = 0; i < S; i++) vc.push_back(X[i]), cnt[X[i]] = 0;
	for(int i = 0; i < T; i++) vc.push_back(Y[i]), cnt[Y[i]] = 1;
	sort(vc.begin(), vc.end(), cmp);
	int sz = vc.size();
	for(int i = 0; i < sz - 1; i++) {
		vc.push_back(lca(vc[i], vc[i + 1]));
	}
	sort(vc.begin(), vc.end(), cmp);
	vc.erase(unique(vc.begin(), vc.end()), vc.end());
	stack<int> st;
	st.push(vc[0]);
	for(int i = 1; i < vc.size(); i++) {
		int v = vc[i];
		while(fn[st.top()] < fn[v]) st.pop();
		child[st.top()].push_back({v, d[v] - d[st.top()]});
		st.push(v);
	}
	ans = inf;
	main_dfs(vc[0]);
	for(auto i : vc) {
		child[i].clear();
		cnt[i] = -1;
		dp[i][0] = dp[i][1] = inf;
	}
	return ans;
}

Compilation message

factories.cpp: In function 'long long int Query(int, int*, int, int*)':
factories.cpp:82:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |  for(int i = 1; i < vc.size(); i++) {
      |                 ~~^~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 47708 KB Output is correct
2 Correct 892 ms 56560 KB Output is correct
3 Correct 896 ms 56456 KB Output is correct
4 Correct 938 ms 56544 KB Output is correct
5 Correct 855 ms 56864 KB Output is correct
6 Correct 592 ms 56396 KB Output is correct
7 Correct 875 ms 56416 KB Output is correct
8 Correct 887 ms 56628 KB Output is correct
9 Correct 814 ms 56868 KB Output is correct
10 Correct 617 ms 56420 KB Output is correct
11 Correct 878 ms 56672 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 47488 KB Output is correct
2 Correct 1459 ms 154424 KB Output is correct
3 Correct 2028 ms 158944 KB Output is correct
4 Correct 1037 ms 170188 KB Output is correct
5 Correct 2139 ms 211900 KB Output is correct
6 Correct 2183 ms 178960 KB Output is correct
7 Correct 1800 ms 91652 KB Output is correct
8 Correct 895 ms 91196 KB Output is correct
9 Correct 1791 ms 98256 KB Output is correct
10 Correct 1714 ms 93468 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 47708 KB Output is correct
2 Correct 892 ms 56560 KB Output is correct
3 Correct 896 ms 56456 KB Output is correct
4 Correct 938 ms 56544 KB Output is correct
5 Correct 855 ms 56864 KB Output is correct
6 Correct 592 ms 56396 KB Output is correct
7 Correct 875 ms 56416 KB Output is correct
8 Correct 887 ms 56628 KB Output is correct
9 Correct 814 ms 56868 KB Output is correct
10 Correct 617 ms 56420 KB Output is correct
11 Correct 878 ms 56672 KB Output is correct
12 Correct 28 ms 47488 KB Output is correct
13 Correct 1459 ms 154424 KB Output is correct
14 Correct 2028 ms 158944 KB Output is correct
15 Correct 1037 ms 170188 KB Output is correct
16 Correct 2139 ms 211900 KB Output is correct
17 Correct 2183 ms 178960 KB Output is correct
18 Correct 1800 ms 91652 KB Output is correct
19 Correct 895 ms 91196 KB Output is correct
20 Correct 1791 ms 98256 KB Output is correct
21 Correct 1714 ms 93468 KB Output is correct
22 Correct 2880 ms 189368 KB Output is correct
23 Correct 2562 ms 190552 KB Output is correct
24 Correct 3111 ms 194292 KB Output is correct
25 Correct 3068 ms 197884 KB Output is correct
26 Correct 3187 ms 187172 KB Output is correct
27 Correct 3264 ms 219844 KB Output is correct
28 Correct 1721 ms 185480 KB Output is correct
29 Correct 3329 ms 185620 KB Output is correct
30 Correct 3292 ms 185172 KB Output is correct
31 Correct 3359 ms 185640 KB Output is correct
32 Correct 1715 ms 100408 KB Output is correct
33 Correct 1000 ms 94784 KB Output is correct
34 Correct 1607 ms 90472 KB Output is correct
35 Correct 1590 ms 90392 KB Output is correct
36 Correct 1757 ms 91324 KB Output is correct
37 Correct 1799 ms 91192 KB Output is correct