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Submission #1026251

# Submission time Handle Problem Language Result Execution time Memory
1026251 2024-07-17T18:30:07 Z xnqs Jakarta Skyscrapers (APIO15_skyscraper) C++17
36 / 100
 690 ms 69080 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <unordered_map>

int x, dog_cnt;
std::vector<std::pair<int,int>> dogs; 
std::unordered_map<int,int> dist[30005];
std::vector<int> dogs_in[30005];

int astar(int pos, int dog) {
	std::priority_queue<std::tuple<int,int,int>, std::vector<std::tuple<int,int,int>>, std::greater<std::tuple<int,int,int>>> pq;
	pq.emplace(-0x3f3f3f3f+std::abs(pos-dogs[1].first)*3,pos,dog);
	dist[pos][dog] = -0x3f3f3f3f;

	int iterations = 1500000;
	while (!pq.empty()&&iterations--) {
		auto [c, pos, dog] = pq.top();
		pq.pop();

		if (pos-dogs[dog].second>=0) {
			if (!dist[pos-dogs[dog].second].count(dog)||dist[pos-dogs[dog].second][dog]>dist[pos][dog]+1) {
				dist[pos-dogs[dog].second][dog] = dist[pos][dog]+1;
				pq.emplace(dist[pos-dogs[dog].second][dog]+std::abs((pos-dogs[dog].second)-dogs[1].first)*3,
				          pos-dogs[dog].second,
				          dog);
			}
		}
		if (pos+dogs[dog].second<x) {
			if (!dist[pos+dogs[dog].second].count(dog)||dist[pos+dogs[dog].second][dog]>dist[pos][dog]+1) {
				dist[pos+dogs[dog].second][dog] = dist[pos][dog]+1;
				pq.emplace(dist[pos+dogs[dog].second][dog]+std::abs((pos+dogs[dog].second)-dogs[1].first)*3,
				          pos+dogs[dog].second,
				          dog);
			}
		}

		if (!dogs_in[pos].empty()) {
			int next_idx = std::lower_bound(dogs_in[pos].begin(),dogs_in[pos].end(),dog)-dogs_in[pos].begin();
			if (next_idx+1>=dogs_in[pos].size()||dogs_in[pos][next_idx]!=dog) {
				next_idx = -1;
			}

			next_idx = dogs_in[pos][next_idx+1];
			if (!dist[pos].count(next_idx)||dist[pos][next_idx]>dist[pos][dog]) {
				dist[pos][next_idx] = dist[pos][dog];
				pq.emplace(dist[pos][next_idx]+std::abs(pos-dogs[1].first)*3,
				           pos,
				           next_idx);
			}

			next_idx = dogs_in[pos][0];
			if (!dist[pos].count(next_idx)||dist[pos][next_idx]>dist[pos][dog]) {
				dist[pos][next_idx] = dist[pos][dog];
				pq.emplace(dist[pos][next_idx]+std::abs(pos-dogs[1].first)*3,
				           pos,
				           next_idx);
			}
		}
	}

	int min = 0x3f3f3f3f;
	for (int i = 0; i < dog_cnt; i++) {
		if (!dist[dogs[1].first].count(i)) {
			continue;
		}

		min = std::min(min, dist[dogs[1].first][i]+0x3f3f3f3f);
	}

	return ((min==0x3f3f3f3f) ? -1 : min);
}

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	std::cout.tie(NULL);

	std::cin >> x >> dog_cnt;
	dogs.reserve(dog_cnt);

	for (int i = 0, a, b; i < dog_cnt; i++) {
		std::cin >> a >> b;
		dogs.emplace_back(a,b);
		dogs_in[a].emplace_back(i);
	}

	for (int i = 0; i < 30005; i++) {
		std::sort(dogs_in[i].begin(),dogs_in[i].end());
	}

	std::cout << astar(dogs[0].first, 0) << "\n";
}

Compilation message

skyscraper.cpp: In function 'int astar(int, int)':
skyscraper.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    if (next_idx+1>=dogs_in[pos].size()||dogs_in[pos][next_idx]!=dog) {
      |        ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 2 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 5 ms 3164 KB Output is correct
12 Correct 27 ms 10864 KB Output is correct
13 Correct 33 ms 10952 KB Output is correct
14 Correct 8 ms 2904 KB Output is correct
15 Correct 7 ms 2908 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2904 KB Output is correct
11 Correct 4 ms 3164 KB Output is correct
12 Correct 26 ms 10788 KB Output is correct
13 Correct 42 ms 10800 KB Output is correct
14 Correct 9 ms 2908 KB Output is correct
15 Correct 8 ms 3052 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 21 ms 3820 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 672 ms 68944 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 7 ms 3164 KB Output is correct
24 Correct 16 ms 3416 KB Output is correct
25 Correct 12 ms 3316 KB Output is correct
26 Correct 226 ms 65260 KB Output is correct
27 Correct 237 ms 66144 KB Output is correct
28 Correct 5 ms 3676 KB Output is correct
29 Correct 44 ms 5708 KB Output is correct
30 Correct 5 ms 3420 KB Output is correct
31 Correct 12 ms 4416 KB Output is correct
32 Correct 6 ms 3676 KB Output is correct
33 Correct 159 ms 8416 KB Output is correct
34 Correct 156 ms 8644 KB Output is correct

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2648 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2736 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 7 ms 3164 KB Output is correct
12 Correct 28 ms 10856 KB Output is correct
13 Correct 35 ms 10836 KB Output is correct
14 Correct 13 ms 2904 KB Output is correct
15 Correct 8 ms 2904 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 22 ms 3676 KB Output is correct
18 Correct 1 ms 2648 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 669 ms 69080 KB Output is correct
21 Correct 1 ms 2648 KB Output is correct
22 Correct 1 ms 2648 KB Output is correct
23 Correct 8 ms 3420 KB Output is correct
24 Correct 18 ms 3420 KB Output is correct
25 Correct 11 ms 3232 KB Output is correct
26 Correct 219 ms 65368 KB Output is correct
27 Correct 257 ms 66132 KB Output is correct
28 Correct 6 ms 3672 KB Output is correct
29 Correct 44 ms 5460 KB Output is correct
30 Correct 4 ms 3420 KB Output is correct
31 Correct 10 ms 4308 KB Output is correct
32 Correct 6 ms 3676 KB Output is correct
33 Correct 166 ms 8528 KB Output is correct
34 Correct 161 ms 8532 KB Output is correct
35 Correct 163 ms 9868 KB Output is correct
36 Correct 27 ms 3672 KB Output is correct
37 Correct 325 ms 16512 KB Output is correct
38 Correct 330 ms 13836 KB Output is correct
39 Correct 218 ms 15244 KB Output is correct
40 Incorrect 472 ms 12036 KB Output isn't correct
41 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 5 ms 3164 KB Output is correct
12 Correct 28 ms 10840 KB Output is correct
13 Correct 43 ms 10760 KB Output is correct
14 Correct 9 ms 2908 KB Output is correct
15 Correct 8 ms 3004 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 23 ms 3676 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 690 ms 68988 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 6 ms 3164 KB Output is correct
24 Correct 16 ms 3420 KB Output is correct
25 Correct 11 ms 3268 KB Output is correct
26 Correct 217 ms 65364 KB Output is correct
27 Correct 241 ms 66284 KB Output is correct
28 Correct 6 ms 3676 KB Output is correct
29 Correct 54 ms 5708 KB Output is correct
30 Correct 5 ms 3420 KB Output is correct
31 Correct 10 ms 4424 KB Output is correct
32 Correct 6 ms 3676 KB Output is correct
33 Correct 146 ms 8572 KB Output is correct
34 Correct 162 ms 8528 KB Output is correct
35 Correct 153 ms 9732 KB Output is correct
36 Correct 26 ms 3672 KB Output is correct
37 Correct 283 ms 16528 KB Output is correct
38 Correct 311 ms 13896 KB Output is correct
39 Correct 185 ms 15012 KB Output is correct
40 Incorrect 465 ms 12040 KB Output isn't correct
41 Halted 0 ms 0 KB -