oj.uz

Submission #114920

# Submission time Handle Problem Language Result Execution time Memory
114920 2019-06-03T23:27:12 Z tutis Highway Tolls (IOI18_highway) C++17
40 / 100
 252 ms 10456 KB 
#include <bits/stdc++.h>
#include "highway.h"
using namespace std;
typedef long long ll;
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B)
{
	vector<int>adj[N];
	int M = U.size();
	for (int i = 0; i < M; i++)
	{
		adj[U[i]].push_back(V[i]);
		adj[V[i]].push_back(U[i]);
	}
	vector<int>tarp;
	for (int i = 0; i < M; i++)
		tarp.push_back(i);
	vector<int>w(M, 1);
	ll maxi = ask(w);
	while (tarp.size() > 1)
	{
		vector<int>t1;
		vector<int>t2;
		for (int i = 0; i < tarp.size(); i++)
		{
			if (i < tarp.size() / 2)
				t1.push_back(tarp[i]);
			else
				t2.push_back(tarp[i]);
		}
		fill_n(w.begin(), M, 1);
		for (int i : t1)
			w[i] = 0;
		if (ask(w) < maxi)
			tarp = t1;
		else
			tarp = t2;
	}
	assert(tarp.size() == 1);
	int u[2] = {U[tarp[0]], V[tarp[0]]};
	int d[2][N];
	int pa[2][N];
	for (int t : {0, 1})
	{
		fill_n(d[t], N, N + 3);
		d[t][u[t]] = 0;
		queue<int>Q;
		Q.push(u[t]);
		while (!Q.empty())
		{
			int a = Q.front();
			Q.pop();
			for (int b : adj[a])
			{
				if (d[t][b] > d[t][a] + 1)
				{
					d[t][b] = d[t][a] + 1;
					Q.push(b);
				}
			}
		}
		for (int i = 0; i < M; i++)
		{
			if (d[t][U[i]] < d[t][V[i]])
				pa[t][V[i]] = i;
			if (d[t][U[i]] > d[t][V[i]])
				pa[t][U[i]] = i;
		}
		pa[t][u[t]] = u[t];
	}
	ll d_st = maxi / ll(B);
	vector<int>v[2];
	for (int t : {0, 1})
	{
		for (int i = 0; i < N; i++)
		{
			if (d[t][i] < d[1 - t][i])
				v[t].push_back(i);
		}
	}
	fill_n(w.begin(), M, 1);
	if (v[0].size() > 1)
		for (int i : v[0])
			w[pa[0][i]] = 0;
	int d_s = ((maxi - ask(w)) / ll(B - A));
	int d_t = d_st - d_s - 1;
	vector<int>s, t;
	for (int i : v[0])
		if (d[0][i] == d_s)
			s.push_back(i);
	for (int i : v[1])
		if (d[1][i] == d_t)
			t.push_back(i);
	while (s.size() > 1)
	{
		vector<int>s1, s2;
		for (int i = 0; i < s.size(); i++)
		{
			if (i < s.size() / 2)
				s1.push_back(s[i]);
			else
				s2.push_back(s[i]);
		}
		fill_n(w.begin(), M, 1ll);
		for (int i : s1)
			w[pa[0][i]] = 0;
		if (ask(w) < maxi)
			s = s1;
		else
			s = s2;
	}
	while (t.size() > 1)
	{
		vector<int>t1, t2;
		for (int i = 0; i < t.size(); i++)
		{
			if (i < t.size() / 2)
				t1.push_back(t[i]);
			else
				t2.push_back(t[i]);
		}
		fill_n(w.begin(), M, 1ll);
		for (int i : t1)
			w[pa[1][i]] = 0;
		if (ask(w) < maxi)
			t = t1;
		else
			t = t2;
	}
	answer(s[0], t[0]);
}/*
int main()
{

}
/**/

Compilation message

highway.cpp:135:1: warning: "/*" within comment [-Wcomment]
 /**/
  
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < tarp.size(); i++)
                   ~~^~~~~~~~~~~~~
highway.cpp:25:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (i < tarp.size() / 2)
        ~~^~~~~~~~~~~~~~~~~
highway.cpp:96:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < s.size(); i++)
                   ~~^~~~~~~~~~
highway.cpp:98:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (i < s.size() / 2)
        ~~^~~~~~~~~~~~~~
highway.cpp:114:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < t.size(); i++)
                   ~~^~~~~~~~~~
highway.cpp:116:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (i < t.size() / 2)
        ~~^~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 320 KB Output is correct
5 Correct 2 ms 320 KB Output is correct
6 Incorrect 2 ms 248 KB Output is incorrect: {s, t} is wrong.
7 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 400 KB Output is correct
2 Correct 27 ms 1384 KB Output is correct
3 Correct 207 ms 9568 KB Output is correct
4 Correct 196 ms 9588 KB Output is correct
5 Correct 190 ms 9648 KB Output is correct
6 Correct 197 ms 9636 KB Output is correct
7 Correct 185 ms 9584 KB Output is correct
8 Correct 179 ms 9548 KB Output is correct
9 Correct 193 ms 9596 KB Output is correct
10 Correct 179 ms 9596 KB Output is correct
11 Correct 208 ms 9336 KB Output is correct
12 Correct 210 ms 9488 KB Output is correct
13 Correct 237 ms 9492 KB Output is correct
14 Correct 211 ms 9484 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 1400 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 23 ms 1260 KB Output is correct
3 Correct 140 ms 7644 KB Output is correct
4 Correct 196 ms 9548 KB Output is correct
5 Correct 190 ms 9596 KB Output is correct
6 Correct 203 ms 9664 KB Output is correct
7 Correct 205 ms 9712 KB Output is correct
8 Correct 163 ms 9748 KB Output is correct
9 Correct 199 ms 9572 KB Output is correct
10 Correct 196 ms 9588 KB Output is correct
11 Correct 191 ms 9472 KB Output is correct
12 Correct 210 ms 9600 KB Output is correct
13 Correct 239 ms 9488 KB Output is correct
14 Correct 192 ms 9280 KB Output is correct
15 Correct 182 ms 9600 KB Output is correct
16 Correct 176 ms 9576 KB Output is correct
17 Correct 182 ms 9556 KB Output is correct
18 Correct 207 ms 9524 KB Output is correct
19 Correct 211 ms 9580 KB Output is correct
20 Correct 209 ms 9528 KB Output is correct
21 Correct 174 ms 10444 KB Output is correct
22 Correct 173 ms 10456 KB Output is correct
23 Correct 198 ms 10280 KB Output is correct
24 Correct 188 ms 10148 KB Output is correct
25 Correct 213 ms 9528 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 21 ms 1344 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 1424 KB Output is correct
2 Correct 46 ms 1384 KB Output is correct
3 Correct 208 ms 9768 KB Output is correct
4 Correct 235 ms 9952 KB Output is correct
5 Incorrect 252 ms 10156 KB Output is incorrect: {s, t} is wrong.
6 Halted 0 ms 0 KB -