oj.uz

Submission #429179

# Submission time Handle Problem Language Result Execution time Memory
429179 2021-06-15T18:20:00 Z albertolg101 Sky Walking (IOI19_walk) C++17
24 / 100
 4000 ms 313036 KB 
#include <bits/stdc++.h>
#include "walk.h"

using namespace std; 
using ll = long long;
using pii = pair<int, int>;

const ll INFLL = 1e18;

long long min_distance(std::vector<int> x, std::vector<int> h, std::vector<int> l, std::vector<int> r, std::vector<int> y, int start, int end) {

	int n = x.size(), 
		m = y.size();

	vector<vector<int>> rmq(h.size(), vector<int> (18));

	for(int i = 0 ; i < h.size() ; i++)
		rmq[i][0] = h[i];

	for(int i = 1 ; (1<<i) < n ; i++)
	{
		for(int j = 0 ; j + (1<<i) - 1 < n ; j++)
		{
			rmq[j][i] = max(rmq[j][i-1], rmq[j+(1<<(i-1))][i-1]);
		}
	};

	function<int(int, int)> query = [&](int l, int r)
	{
		int lg = __lg(r - l + 1);
		return max(rmq[l][lg], rmq[r-(1<<lg)+1][lg]);
	};

	vector<pii> cc;
	vector<vector<int>> d(n);
	d[start].push_back(0);
	d[end].push_back(0);
	cc.push_back({x[start], 0});
	cc.push_back({x[end], 0});

	for(int i = 0 ; i < m ; i++)
	{
		int L = l[i];
		cc.push_back({x[l[i]], y[i]});
		d[l[i]].push_back(y[i]);

		while(l[i] < r[i])
		{
			for(int j = 18 ; j >= 0 ; j--)
			{
				int target = l[i] + (1<<j);

				if(target <= r[i] and query(l[i]+1, target) < y[i])
					l[i] = target;
			}

			l[i]++;
			cc.push_back({x[l[i]], y[i]});
			d[l[i]].push_back(y[i]);
		}

		l[i] = L;
	}

	sort(cc.begin(), cc.end());
	cc.resize(unique(cc.begin(), cc.end()) - cc.begin());

	function<int(int, int)> f = [&](int a, int b)
	{
		return lower_bound(cc.begin(), cc.end(), (pii){a, b}) - cc.begin();
	};

	vector<vector<pair<int, ll>>> g(cc.size());

	for(int i = 0 ; i < m ; i++)
	{
		int last = l[i];

		while(l[i] < r[i])
		{
			for(int j = 18 ; j >= 0 ; j--)
			{
				int target = l[i] + (1<<j);

				if(target <= r[i] and query(l[i]+1, target) < y[i])
					l[i] = target;
			}

			l[i]++;
			int a = f(x[last], y[i]),
				b = f(x[l[i]], y[i]),
				w = x[l[i]] - x[last];

			g[a].push_back({b, w});
			g[b].push_back({a, w});
			last = l[i];
		}
	}

	for(int i = 0 ; i < n ; i++)
	{
		sort(d[i].begin(), d[i].end());

		for(int j = 0 ; j + 1 < d[i].size() ; j++)
		{
			int a = f(x[i], d[i][j]),
				b = f(x[i], d[i][j+1]),
				w = d[i][j+1] - d[i][j];

			g[a].push_back({b, w});
			g[b].push_back({a, w});
		}
	}

	priority_queue<pair<ll, int>> q;
	vector<ll> dp(cc.size(), INFLL);
	vector<bool> flag(cc.size());
	int s = f(x[start], 0);
	dp[s] = 0;
	q.push({0, s});

	while(q.size())
	{
		int nod = q.top().second;
		q.pop();

		if(flag[nod])
			continue;

		flag[nod] = true;

		for(auto i: g[nod])
		{
			if(dp[i.first] > dp[nod] + i.second)
			{
				dp[i.first] = dp[nod] + i.second;
				q.push({-dp[i.first], i.first});
			}
		}
	}

	int e = f(x[end], 0);
	return (dp[e] == INFLL ? -1 : dp[e]);
}

Compilation message

walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for(int i = 0 ; i < h.size() ; i++)
      |                  ~~^~~~~~~~~~
walk.cpp:104:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |   for(int j = 0 ; j + 1 < d[i].size() ; j++)
      |                   ~~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 2 ms 424 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1155 ms 95788 KB Output is correct
4 Correct 1154 ms 110128 KB Output is correct
5 Correct 804 ms 96104 KB Output is correct
6 Correct 729 ms 85804 KB Output is correct
7 Correct 904 ms 96136 KB Output is correct
8 Correct 1471 ms 121160 KB Output is correct
9 Correct 889 ms 94152 KB Output is correct
10 Correct 1618 ms 148104 KB Output is correct
11 Correct 652 ms 55824 KB Output is correct
12 Correct 337 ms 42676 KB Output is correct
13 Correct 1352 ms 131852 KB Output is correct
14 Correct 430 ms 41428 KB Output is correct
15 Correct 431 ms 41984 KB Output is correct
16 Correct 373 ms 42340 KB Output is correct
17 Correct 357 ms 41036 KB Output is correct
18 Correct 344 ms 48024 KB Output is correct
19 Correct 10 ms 2120 KB Output is correct
20 Correct 96 ms 19840 KB Output is correct
21 Correct 323 ms 38712 KB Output is correct
22 Correct 344 ms 41776 KB Output is correct
23 Correct 468 ms 51000 KB Output is correct
24 Correct 377 ms 41752 KB Output is correct
25 Correct 347 ms 41076 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 15540 KB Output is correct
2 Execution timed out 4057 ms 313036 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 15540 KB Output is correct
2 Execution timed out 4057 ms 313036 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 2 ms 424 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1155 ms 95788 KB Output is correct
21 Correct 1154 ms 110128 KB Output is correct
22 Correct 804 ms 96104 KB Output is correct
23 Correct 729 ms 85804 KB Output is correct
24 Correct 904 ms 96136 KB Output is correct
25 Correct 1471 ms 121160 KB Output is correct
26 Correct 889 ms 94152 KB Output is correct
27 Correct 1618 ms 148104 KB Output is correct
28 Correct 652 ms 55824 KB Output is correct
29 Correct 337 ms 42676 KB Output is correct
30 Correct 1352 ms 131852 KB Output is correct
31 Correct 430 ms 41428 KB Output is correct
32 Correct 431 ms 41984 KB Output is correct
33 Correct 373 ms 42340 KB Output is correct
34 Correct 357 ms 41036 KB Output is correct
35 Correct 344 ms 48024 KB Output is correct
36 Correct 10 ms 2120 KB Output is correct
37 Correct 96 ms 19840 KB Output is correct
38 Correct 323 ms 38712 KB Output is correct
39 Correct 344 ms 41776 KB Output is correct
40 Correct 468 ms 51000 KB Output is correct
41 Correct 377 ms 41752 KB Output is correct
42 Correct 347 ms 41076 KB Output is correct
43 Correct 143 ms 15540 KB Output is correct
44 Execution timed out 4057 ms 313036 KB Time limit exceeded
45 Halted 0 ms 0 KB -