oj.uz

Submission #101198

# Submission time Handle Problem Language Result Execution time Memory
101198 2019-03-17T11:27:43 Z davitmarg Race (IOI11_race) C++17
21 / 100
 3000 ms 15124 KB 
/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <iterator>
#include <ctype.h>
#include <stdlib.h>  
#include <cassert>
#include <fstream>

#ifndef death
#include "race.h"
#endif

#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(),v.end()
using namespace std;

int C,n, k, d[200005], usedd[200005], used[200005], used1[200005], usedc[200005], ans = mod,color;
vector<pair<int, LL>> g[200005];
map<LL, int> dp;
vector<pair<LL, int>> upd;
void dfs1(int v)
{
	usedd[v] = C;
	d[v] = 1;
	for (int i = 0; i<g[v].size(); i++)
	{
		int to = g[v][i].first;
		if (usedd[to] == C || usedc[to])
			continue;
		dfs1(to);
		d[v] += d[to];
	}
}

int centroid(int v)
{
	usedc[v] = 1;
	for (int i = 0; i<g[v].size(); i++)
	{
		int to = g[v][i].first;
		if (usedc[to])
			continue;
		if (d[to] > d[v] / 2)
			return centroid(to);
	}
	return v;
}

void dfs(int v, LL dist, int depth)
{
	used[v] = color;

	if (dp[dist] == 0)
		dp[dist] = mod;

	if (k > dist && dp[k - dist] == 0)
		dp[k - dist] = mod;

	upd.PB(MP(dist, depth));

	if (k > dist)
		ans = min(depth + dp[k - dist], ans);
	else if (dist == k)
		ans = min(depth, ans);

	for (int i = 0; i<g[v].size(); i++)
	{
		int to = g[v][i].first;
		LL D = g[v][i].second;
		if (used[to] == color || used1[to])
			continue;
		dfs(to, dist + D, depth + 1);
	}
}

void solve(int v)
{
	color++;
	used1[v] = 1;
	usedc[v] = 1;

	vector<int> nxt;
	dp.clear();

	for (int i = 0; i<g[v].size(); i++)
	{
		int to = g[v][i].first;
		LL D = g[v][i].second;
		if (used1[to])
			continue;
		nxt.PB(to);
		upd.resize(0);
		dfs(to, D, 1);
		for (int j = 0; j < upd.size(); j++)
			dp[upd[j].first] = min(upd[j].second, dp[upd[j].first]);
	}
	for (int i = 0; i < nxt.size(); i++)
	{
		C++;
		dfs1(nxt[i]);
		solve(centroid(nxt[i]));
	}
}

int Main()
{
	dfs1(1);
	int c = centroid(1);
	memset(usedc, 0, sizeof(int)*(n + 2));
	solve(c);
	if (ans == mod)
		ans = -1;
	return 0;
}

int best_path(int N, int K, int h[][2], int l[])
{
	n = N;
	k = K;
	for (int i = 0; i < n-1; i++)
	{
		h[i][0]++;
		h[i][1]++;
		g[h[i][0]].PB(MP(h[i][1], l[i]));
		g[h[i][1]].PB(MP(h[i][0], l[i]));
	}
	Main();
	return ans;
}

#ifdef death
int main()
{
	cin >> n >> k;

	for (int i = 0; i < n - 1; i++)
	{
		int a, b;
		LL D;
		cin >> a >> b >> D;
		a++;
		b++;
		g[a].PB(MP(b, D));
		g[b].PB(MP(a, D));
	}
	Main();
	cout << ans << endl;
	return 0;
}
#endif

/*

*/

Compilation message

race.cpp: In function 'void dfs1(int)':
race.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i<g[v].size(); i++)
                  ~^~~~~~~~~~~~
race.cpp: In function 'int centroid(int)':
race.cpp:52:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i<g[v].size(); i++)
                  ~^~~~~~~~~~~~
race.cpp: In function 'void dfs(int, long long int, int)':
race.cpp:80:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i<g[v].size(); i++)
                  ~^~~~~~~~~~~~
race.cpp: In function 'void solve(int)':
race.cpp:99:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i<g[v].size(); i++)
                  ~^~~~~~~~~~~~
race.cpp:108:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < upd.size(); j++)
                   ~~^~~~~~~~~~~~
race.cpp:111:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < nxt.size(); i++)
                  ~~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 9 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 9 ms 5120 KB Output is correct
6 Correct 10 ms 5248 KB Output is correct
7 Correct 8 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 10 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 9 ms 5120 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 10 ms 5120 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 9 ms 5120 KB Output is correct
17 Correct 10 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 9 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 9 ms 5120 KB Output is correct
6 Correct 10 ms 5248 KB Output is correct
7 Correct 8 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 10 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 9 ms 5120 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 10 ms 5120 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 9 ms 5120 KB Output is correct
17 Correct 10 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Correct 6 ms 5120 KB Output is correct
20 Correct 7 ms 5248 KB Output is correct
21 Correct 11 ms 5120 KB Output is correct
22 Correct 50 ms 5368 KB Output is correct
23 Correct 52 ms 5248 KB Output is correct
24 Correct 12 ms 5248 KB Output is correct
25 Correct 14 ms 5248 KB Output is correct
26 Correct 11 ms 5248 KB Output is correct
27 Correct 9 ms 5120 KB Output is correct
28 Correct 28 ms 5248 KB Output is correct
29 Correct 16 ms 5376 KB Output is correct
30 Correct 15 ms 5376 KB Output is correct
31 Correct 18 ms 5248 KB Output is correct
32 Correct 18 ms 5248 KB Output is correct
33 Correct 107 ms 5368 KB Output is correct
34 Correct 109 ms 5368 KB Output is correct
35 Correct 120 ms 5320 KB Output is correct
36 Correct 76 ms 5248 KB Output is correct
37 Correct 137 ms 5360 KB Output is correct
38 Correct 163 ms 5372 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 9 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 9 ms 5120 KB Output is correct
6 Correct 10 ms 5248 KB Output is correct
7 Correct 8 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 10 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 9 ms 5120 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 10 ms 5120 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 9 ms 5120 KB Output is correct
17 Correct 10 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Execution timed out 3034 ms 15124 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 9 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 8 ms 5120 KB Output is correct
5 Correct 9 ms 5120 KB Output is correct
6 Correct 10 ms 5248 KB Output is correct
7 Correct 8 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 10 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 9 ms 5120 KB Output is correct
12 Correct 8 ms 5120 KB Output is correct
13 Correct 10 ms 5120 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 9 ms 5120 KB Output is correct
17 Correct 10 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Correct 6 ms 5120 KB Output is correct
20 Correct 7 ms 5248 KB Output is correct
21 Correct 11 ms 5120 KB Output is correct
22 Correct 50 ms 5368 KB Output is correct
23 Correct 52 ms 5248 KB Output is correct
24 Correct 12 ms 5248 KB Output is correct
25 Correct 14 ms 5248 KB Output is correct
26 Correct 11 ms 5248 KB Output is correct
27 Correct 9 ms 5120 KB Output is correct
28 Correct 28 ms 5248 KB Output is correct
29 Correct 16 ms 5376 KB Output is correct
30 Correct 15 ms 5376 KB Output is correct
31 Correct 18 ms 5248 KB Output is correct
32 Correct 18 ms 5248 KB Output is correct
33 Correct 107 ms 5368 KB Output is correct
34 Correct 109 ms 5368 KB Output is correct
35 Correct 120 ms 5320 KB Output is correct
36 Correct 76 ms 5248 KB Output is correct
37 Correct 137 ms 5360 KB Output is correct
38 Correct 163 ms 5372 KB Output is correct
39 Execution timed out 3034 ms 15124 KB Time limit exceeded
40 Halted 0 ms 0 KB -