oj.uz

Submission #112629

# Submission time Handle Problem Language Result Execution time Memory
112629 2019-05-21T05:44:06 Z maruii Factories (JOI14_factories) C++14
100 / 100
 3861 ms 110336 KB 
#include "factories.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define ff first
#define ss second
const ll INF = 1e15;

int dfn[500005], dfnn, efn[500005], prt[19][500005];
int dep[500005];
ll D[500005];
vector<pii> edge[500005];

void dfs0(int x, int p) {
	dfn[x] = ++dfnn;
	for (auto i : edge[x]) {
		if (i.ss == p) continue;
		dep[dfnn + 1] = dep[dfn[x]] + 1;
		D[dfnn + 1] = D[dfn[x]] + i.ff;
		prt[0][dfnn + 1] = dfn[x];
		dfs0(i.ss, x);
	}
	efn[dfn[x]] = dfnn;
}

int C[1000005], cnt, pv, XY[500005];
ll res;

pll dfs(int x) {
	ll S = INF, T = INF;
	if (XY[x] == 1) S = 0;
	if (XY[x] == 2) T = 0;
	XY[x] = 0;
	while (pv < cnt && C[pv] <= efn[x]) {
		int i = C[pv++];
		auto r = dfs(i);
		S = min(S, r.ff + D[i] - D[x]);
		T = min(T, r.ss + D[i] - D[x]);
	}
	res = min(res, S+T);
	return pll(S, T);
}

int lca(int s, int e) {
	if (dep[s] < dep[e]) swap(s, e);
	for (int i = 18; i >= 0; --i)
		if ((dep[s] - dep[e] >> i) & 1) s = prt[i][s];
	if (s == e) return s;
	for (int i = 18; i >= 0; --i)
		if (prt[i][s] != prt[i][e]) s = prt[i][s], e = prt[i][e];
	return prt[0][s];
}

ll Query(int S, int X[], int T, int Y[]) {
	cnt = 0;
	for (int i = 0; i < S; ++i) C[cnt] = dfn[X[i]], XY[C[cnt++]] = 1;
	for (int i = 0; i < T; ++i) C[cnt] = dfn[Y[i]], XY[C[cnt++]] = 2;
	sort(C, C + cnt);
	for (int i = cnt-1; i; --i) C[cnt++] = lca(C[i - 1], C[i]);
	sort(C, C + cnt);
	cnt = unique(C, C + cnt) - C;
	res = INF, pv = 0;
	dfs(1);
	return res;
}

void Init(int N, int A[], int B[], int D[]) {
	for (int i = 0; i < N - 1; ++i) {
		edge[A[i]].emplace_back(D[i], B[i]);
		edge[B[i]].emplace_back(D[i], A[i]);
	}
	dfs0(0, 0);
	for (int i = 1; i < 19; ++i) for (int j = 1; j <= N; ++j) prt[i][j] = prt[i - 1][prt[i - 1][j]];
}

Compilation message

factories.cpp: In function 'int lca(int, int)':
factories.cpp:49:15: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   if ((dep[s] - dep[e] >> i) & 1) s = prt[i][s];
        ~~~~~~~^~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 12672 KB Output is correct
2 Correct 653 ms 21112 KB Output is correct
3 Correct 686 ms 30584 KB Output is correct
4 Correct 679 ms 30712 KB Output is correct
5 Correct 613 ms 30712 KB Output is correct
6 Correct 477 ms 30712 KB Output is correct
7 Correct 681 ms 30840 KB Output is correct
8 Correct 651 ms 30712 KB Output is correct
9 Correct 627 ms 30848 KB Output is correct
10 Correct 473 ms 30584 KB Output is correct
11 Correct 675 ms 30668 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12416 KB Output is correct
2 Correct 1945 ms 92748 KB Output is correct
3 Correct 2481 ms 93256 KB Output is correct
4 Correct 1514 ms 93276 KB Output is correct
5 Correct 2495 ms 110096 KB Output is correct
6 Correct 2710 ms 94584 KB Output is correct
7 Correct 1776 ms 50424 KB Output is correct
8 Correct 1075 ms 51692 KB Output is correct
9 Correct 1839 ms 53496 KB Output is correct
10 Correct 1817 ms 51960 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 12672 KB Output is correct
2 Correct 653 ms 21112 KB Output is correct
3 Correct 686 ms 30584 KB Output is correct
4 Correct 679 ms 30712 KB Output is correct
5 Correct 613 ms 30712 KB Output is correct
6 Correct 477 ms 30712 KB Output is correct
7 Correct 681 ms 30840 KB Output is correct
8 Correct 651 ms 30712 KB Output is correct
9 Correct 627 ms 30848 KB Output is correct
10 Correct 473 ms 30584 KB Output is correct
11 Correct 675 ms 30668 KB Output is correct
12 Correct 13 ms 12416 KB Output is correct
13 Correct 1945 ms 92748 KB Output is correct
14 Correct 2481 ms 93256 KB Output is correct
15 Correct 1514 ms 93276 KB Output is correct
16 Correct 2495 ms 110096 KB Output is correct
17 Correct 2710 ms 94584 KB Output is correct
18 Correct 1776 ms 50424 KB Output is correct
19 Correct 1075 ms 51692 KB Output is correct
20 Correct 1839 ms 53496 KB Output is correct
21 Correct 1817 ms 51960 KB Output is correct
22 Correct 2027 ms 94872 KB Output is correct
23 Correct 2520 ms 97192 KB Output is correct
24 Correct 1999 ms 96248 KB Output is correct
25 Correct 2344 ms 99556 KB Output is correct
26 Correct 3235 ms 95628 KB Output is correct
27 Correct 2161 ms 110336 KB Output is correct
28 Correct 1464 ms 97988 KB Output is correct
29 Correct 3612 ms 95148 KB Output is correct
30 Correct 3727 ms 95068 KB Output is correct
31 Correct 3861 ms 95524 KB Output is correct
32 Correct 1196 ms 54840 KB Output is correct
33 Correct 833 ms 52580 KB Output is correct
34 Correct 1024 ms 48564 KB Output is correct
35 Correct 1042 ms 48632 KB Output is correct
36 Correct 1157 ms 49044 KB Output is correct
37 Correct 1302 ms 49144 KB Output is correct