oj.uz

답안 #691865

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
691865 2023-01-31T19:07:01 Z Markomafko972 경주 (Race) (IOI11_race) C++14
100 / 100
 574 ms 38440 KB 
#include <bits/stdc++.h>
#include "race.h"
#define X first
#define Y second
#define pb push_back
#define pii pair<int, int>
typedef long long ll;
using namespace std;

const int MOD = 1e9 + 7;
const ll INF = 1e18;
const int OFF = (1 << 20);

int n, k, sol = 1e9;
vector< pair<int, int> > v[200005];
int kol[200005];
ll d[200005];
int bio[200005];
int w[1000005];

void dfs(int x, int p, ll dist) {
	d[x] = dist;
	kol[x]++;
	
	for (int i = 0; i < v[x].size(); i++) {
		if (v[x][i].X != p) {
			dfs(v[x][i].X, x, dist+v[x][i].Y);
			kol[x] += kol[v[x][i].X];
		}
	}
}

void postavi(int x, int p, ll l1, int l2) {
	if (l1 <= k) w[l1] = min(w[l1], l2);
	
	for (int i = 0; i < v[x].size(); i++) {
		if (v[x][i].X != p && bio[v[x][i].X] == 0) postavi(v[x][i].X, x, l1+v[x][i].Y, l2+1);
	}
}

void odstavi(int x, int p, ll l1, int l2) {
	if (l1 <= k) w[l1] = 1e9;
	
	for (int i = 0; i < v[x].size(); i++) {
		if (v[x][i].X != p && bio[v[x][i].X] == 0) odstavi(v[x][i].X, x, l1+v[x][i].Y, l2+1);
	}
}

void racunaj(int x, int p, ll l1, int l2) {
	if (l1 <= k && w[k-l1] != 1e9) sol = min(sol, w[k-l1]+l2);
	
	for (int i = 0; i < v[x].size(); i++) {
		if (v[x][i].X != p && bio[v[x][i].X] == 0) racunaj(v[x][i].X, x, l1+v[x][i].Y, l2+1);
	}
}

void centroidna(int x, int siz) {
	while (1) {
		int maxi = -1, gdje = -1;
		for (int i = 0; i < v[x].size(); i++) {
			if (bio[v[x][i].X] == 0 && kol[v[x][i].X] > maxi) {
				maxi = kol[v[x][i].X];
				gdje = v[x][i].X;
			}
		}
	
		if (maxi > siz/2) {
			int pri = kol[gdje];
			kol[gdje] = kol[x];
			kol[x] -= pri;
			x = gdje;
		}
		else break;
	}
	
	bio[x] = 1;
	w[0] = 0;
	for (int i = 0; i < v[x].size(); i++) {
		if (bio[v[x][i].X] == 0) {
			racunaj(v[x][i].X, x, v[x][i].Y, 1);
			postavi(v[x][i].X, x, v[x][i].Y, 1);
		}
	}
	for (int i = 0; i < v[x].size(); i++) {
		if (bio[v[x][i].X] == 0) odstavi(v[x][i].X, x, v[x][i].Y, 1);
	}
	w[0] = 1e9;
	
	for (int i = 0; i < v[x].size(); i++) {
		if (bio[v[x][i].X] == 0) centroidna(v[x][i].X, kol[v[x][i].X]);
	}
}

int best_path(int N, int K, int h[][2], int l[]) {

	n = N;
	k = K;
	
	for (int i = 0; i < n-1; i++) {
		v[h[i][0]].push_back({h[i][1], l[i]});
		v[h[i][1]].push_back({h[i][0], l[i]});
	}
	
	for (int i = 0; i <= k; i++) w[i] = 1e9;
	
	dfs(0, -1, 0);
	centroidna(0, n);
	if (sol == 1e9) return -1;
	else return sol;
}

Compilation message

race.cpp: In function 'void dfs(int, int, ll)':
race.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp: In function 'void postavi(int, int, ll, int)':
race.cpp:36:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp: In function 'void odstavi(int, int, ll, int)':
race.cpp:44:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp: In function 'void racunaj(int, int, ll, int)':
race.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp: In function 'void centroidna(int, int)':
race.cpp:60:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |   for (int i = 0; i < v[x].size(); i++) {
      |                   ~~^~~~~~~~~~~~~
race.cpp:78:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp:84:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~
race.cpp:89:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |  for (int i = 0; i < v[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5004 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4968 KB Output is correct
7 Correct 3 ms 5000 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5004 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5004 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4968 KB Output is correct
7 Correct 3 ms 5000 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5004 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4996 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 5 ms 8660 KB Output is correct
23 Correct 7 ms 7960 KB Output is correct
24 Correct 5 ms 8468 KB Output is correct
25 Correct 5 ms 8404 KB Output is correct
26 Correct 4 ms 6424 KB Output is correct
27 Correct 5 ms 8148 KB Output is correct
28 Correct 3 ms 5844 KB Output is correct
29 Correct 4 ms 6300 KB Output is correct
30 Correct 5 ms 6484 KB Output is correct
31 Correct 5 ms 7636 KB Output is correct
32 Correct 14 ms 7892 KB Output is correct
33 Correct 5 ms 8148 KB Output is correct
34 Correct 5 ms 7432 KB Output is correct
35 Correct 7 ms 8276 KB Output is correct
36 Correct 7 ms 8660 KB Output is correct
37 Correct 5 ms 8148 KB Output is correct
38 Correct 4 ms 6988 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5004 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4968 KB Output is correct
7 Correct 3 ms 5000 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5004 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 164 ms 12764 KB Output is correct
20 Correct 148 ms 12768 KB Output is correct
21 Correct 133 ms 12792 KB Output is correct
22 Correct 119 ms 12880 KB Output is correct
23 Correct 100 ms 13020 KB Output is correct
24 Correct 70 ms 12896 KB Output is correct
25 Correct 168 ms 16452 KB Output is correct
26 Correct 90 ms 19972 KB Output is correct
27 Correct 191 ms 20628 KB Output is correct
28 Correct 391 ms 35412 KB Output is correct
29 Correct 574 ms 34280 KB Output is correct
30 Correct 194 ms 20832 KB Output is correct
31 Correct 190 ms 20920 KB Output is correct
32 Correct 326 ms 21044 KB Output is correct
33 Correct 279 ms 19820 KB Output is correct
34 Correct 285 ms 20684 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5004 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 4 ms 4968 KB Output is correct
7 Correct 3 ms 5000 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5004 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4996 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 5 ms 8660 KB Output is correct
23 Correct 7 ms 7960 KB Output is correct
24 Correct 5 ms 8468 KB Output is correct
25 Correct 5 ms 8404 KB Output is correct
26 Correct 4 ms 6424 KB Output is correct
27 Correct 5 ms 8148 KB Output is correct
28 Correct 3 ms 5844 KB Output is correct
29 Correct 4 ms 6300 KB Output is correct
30 Correct 5 ms 6484 KB Output is correct
31 Correct 5 ms 7636 KB Output is correct
32 Correct 14 ms 7892 KB Output is correct
33 Correct 5 ms 8148 KB Output is correct
34 Correct 5 ms 7432 KB Output is correct
35 Correct 7 ms 8276 KB Output is correct
36 Correct 7 ms 8660 KB Output is correct
37 Correct 5 ms 8148 KB Output is correct
38 Correct 4 ms 6988 KB Output is correct
39 Correct 164 ms 12764 KB Output is correct
40 Correct 148 ms 12768 KB Output is correct
41 Correct 133 ms 12792 KB Output is correct
42 Correct 119 ms 12880 KB Output is correct
43 Correct 100 ms 13020 KB Output is correct
44 Correct 70 ms 12896 KB Output is correct
45 Correct 168 ms 16452 KB Output is correct
46 Correct 90 ms 19972 KB Output is correct
47 Correct 191 ms 20628 KB Output is correct
48 Correct 391 ms 35412 KB Output is correct
49 Correct 574 ms 34280 KB Output is correct
50 Correct 194 ms 20832 KB Output is correct
51 Correct 190 ms 20920 KB Output is correct
52 Correct 326 ms 21044 KB Output is correct
53 Correct 279 ms 19820 KB Output is correct
54 Correct 285 ms 20684 KB Output is correct
55 Correct 58 ms 5748 KB Output is correct
56 Correct 11 ms 5784 KB Output is correct
57 Correct 75 ms 12968 KB Output is correct
58 Correct 33 ms 12752 KB Output is correct
59 Correct 86 ms 20708 KB Output is correct
60 Correct 455 ms 38440 KB Output is correct
61 Correct 184 ms 21096 KB Output is correct
62 Correct 183 ms 24812 KB Output is correct
63 Correct 403 ms 25036 KB Output is correct
64 Correct 448 ms 23156 KB Output is correct
65 Correct 365 ms 21828 KB Output is correct
66 Correct 437 ms 35864 KB Output is correct
67 Correct 116 ms 25584 KB Output is correct
68 Correct 266 ms 25612 KB Output is correct
69 Correct 261 ms 25804 KB Output is correct
70 Correct 247 ms 24948 KB Output is correct