oj.uz

Submission #387941

# Submission time Handle Problem Language Result Execution time Memory
387941 2021-04-09T14:37:14 Z ritul_kr_singh Race (IOI11_race) C++17
100 / 100
 631 ms 37264 KB 
#include <bits/stdc++.h>
using namespace std;
// #define int long long
#define sp << ' ' <<
#define nl << '\n'
#define v e.first
#define w e.second
#include "race.h"

const int MAXN = 2e5, INF = 1e9;

int ans = INF, k;

vector<vector<pair<int, int>>> g(MAXN);
vector<int> s(MAXN), len(1000001, INF);
vector<bool> r(MAXN);
vector<int> toUpdate;

int calcSize(int u, int p){
	s[u] = 1;
	for(auto &e : g[u]) if(v != p and !r[v]) s[u] += calcSize(v, u);
	return s[u];
}

void calcDist(int u, int p, int currLength, int currDist, int root){
	if(currDist>k) return;
	if(len[currDist]==INF) toUpdate.push_back(currDist);
	len[currDist] = min(len[currDist], currLength);

	for(auto &e : g[u]) if(v != p and !r[v]) calcDist(v, u, currLength+1, currDist+w, root);
}

void dfs(int u, int p, int currLength, int currDist, int root){
	if(currDist>k) return;
	ans = min(ans, len[k-currDist] + currLength);

	for(auto &e : g[u]) if(v != p and !r[v]) dfs(v, u, currLength+1, currDist+w, root);
}

int find(int u, int p, int treeSize){
	for(auto &e : g[u]) if(v != p and !r[v] and s[v] > treeSize/2) return find(v, u, treeSize);
	return u;
}

void decompose(int u){
	int c = find(u, u, calcSize(u, u));
	r[c] = true;
	for(auto &e : g[c]){
		if(r[v]) continue;
		dfs(v, c, 1, w, c);
		calcDist(v, c, 1, w, c);
	}
	ans = min(ans, len[k]);
	while(!toUpdate.empty()) len[toUpdate.back()] = INF, toUpdate.pop_back();
	for(auto &e : g[c]) if(!r[v]) decompose(v);
}


int best_path(int N, int K, int H[][2], int L[]){
	k = K;
	for(int i=0; i<N-1; ++i){
		g[H[i][0]].emplace_back(H[i][1], L[i]);
		g[H[i][1]].emplace_back(H[i][0], L[i]);
	}
	decompose(0);
	if(ans>N) ans = -1;
	return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9680 KB Output is correct
6 Correct 6 ms 9676 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9680 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9652 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9680 KB Output is correct
6 Correct 6 ms 9676 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9680 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9652 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 7 ms 9676 KB Output is correct
20 Correct 6 ms 9676 KB Output is correct
21 Correct 6 ms 9676 KB Output is correct
22 Correct 7 ms 9676 KB Output is correct
23 Correct 7 ms 9676 KB Output is correct
24 Correct 7 ms 9676 KB Output is correct
25 Correct 7 ms 9676 KB Output is correct
26 Correct 8 ms 9676 KB Output is correct
27 Correct 7 ms 9676 KB Output is correct
28 Correct 7 ms 9792 KB Output is correct
29 Correct 7 ms 9676 KB Output is correct
30 Correct 7 ms 9676 KB Output is correct
31 Correct 7 ms 9804 KB Output is correct
32 Correct 7 ms 9676 KB Output is correct
33 Correct 7 ms 9676 KB Output is correct
34 Correct 6 ms 9804 KB Output is correct
35 Correct 7 ms 9804 KB Output is correct
36 Correct 7 ms 9804 KB Output is correct
37 Correct 7 ms 9804 KB Output is correct
38 Correct 7 ms 9676 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9680 KB Output is correct
6 Correct 6 ms 9676 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9680 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9652 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 146 ms 14476 KB Output is correct
20 Correct 142 ms 14528 KB Output is correct
21 Correct 166 ms 14488 KB Output is correct
22 Correct 172 ms 14556 KB Output is correct
23 Correct 95 ms 14788 KB Output is correct
24 Correct 72 ms 14708 KB Output is correct
25 Correct 165 ms 18196 KB Output is correct
26 Correct 108 ms 21840 KB Output is correct
27 Correct 208 ms 19632 KB Output is correct
28 Correct 333 ms 37000 KB Output is correct
29 Correct 367 ms 35884 KB Output is correct
30 Correct 215 ms 22552 KB Output is correct
31 Correct 206 ms 22536 KB Output is correct
32 Correct 298 ms 22660 KB Output is correct
33 Correct 243 ms 21428 KB Output is correct
34 Correct 212 ms 22340 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9680 KB Output is correct
6 Correct 6 ms 9676 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9680 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9652 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 7 ms 9676 KB Output is correct
20 Correct 6 ms 9676 KB Output is correct
21 Correct 6 ms 9676 KB Output is correct
22 Correct 7 ms 9676 KB Output is correct
23 Correct 7 ms 9676 KB Output is correct
24 Correct 7 ms 9676 KB Output is correct
25 Correct 7 ms 9676 KB Output is correct
26 Correct 8 ms 9676 KB Output is correct
27 Correct 7 ms 9676 KB Output is correct
28 Correct 7 ms 9792 KB Output is correct
29 Correct 7 ms 9676 KB Output is correct
30 Correct 7 ms 9676 KB Output is correct
31 Correct 7 ms 9804 KB Output is correct
32 Correct 7 ms 9676 KB Output is correct
33 Correct 7 ms 9676 KB Output is correct
34 Correct 6 ms 9804 KB Output is correct
35 Correct 7 ms 9804 KB Output is correct
36 Correct 7 ms 9804 KB Output is correct
37 Correct 7 ms 9804 KB Output is correct
38 Correct 7 ms 9676 KB Output is correct
39 Correct 146 ms 14476 KB Output is correct
40 Correct 142 ms 14528 KB Output is correct
41 Correct 166 ms 14488 KB Output is correct
42 Correct 172 ms 14556 KB Output is correct
43 Correct 95 ms 14788 KB Output is correct
44 Correct 72 ms 14708 KB Output is correct
45 Correct 165 ms 18196 KB Output is correct
46 Correct 108 ms 21840 KB Output is correct
47 Correct 208 ms 19632 KB Output is correct
48 Correct 333 ms 37000 KB Output is correct
49 Correct 367 ms 35884 KB Output is correct
50 Correct 215 ms 22552 KB Output is correct
51 Correct 206 ms 22536 KB Output is correct
52 Correct 298 ms 22660 KB Output is correct
53 Correct 243 ms 21428 KB Output is correct
54 Correct 212 ms 22340 KB Output is correct
55 Correct 15 ms 10408 KB Output is correct
56 Correct 16 ms 10264 KB Output is correct
57 Correct 94 ms 16092 KB Output is correct
58 Correct 45 ms 15868 KB Output is correct
59 Correct 123 ms 23752 KB Output is correct
60 Correct 565 ms 37264 KB Output is correct
61 Correct 228 ms 22756 KB Output is correct
62 Correct 267 ms 22640 KB Output is correct
63 Correct 334 ms 22688 KB Output is correct
64 Correct 631 ms 23512 KB Output is correct
65 Correct 335 ms 23428 KB Output is correct
66 Correct 491 ms 33420 KB Output is correct
67 Correct 145 ms 23220 KB Output is correct
68 Correct 362 ms 24004 KB Output is correct
69 Correct 344 ms 24132 KB Output is correct
70 Correct 326 ms 23488 KB Output is correct