oj.uz

Submission #1048866

# Submission time Handle Problem Language Result Execution time Memory
1048866 2024-08-08T10:05:44 Z dozer Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 363680 KB 
#include "walk.h"
#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n"
#define pb push_back
#define pii pair<ll, ll>
#define st first
#define nd second
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define LL node * 2
#define RR node * 2 + 1
#define ll long long



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 s, int g) {
	ll n = x.size(), m = l.size();
	vector<map<ll, long long>> dist(n);
	vector<vector<pii>> adj(n);
	vector<vector<ll>> polls(n);
	vector<array<ll, 3>> events;
	vector<ll> last(m, -1);



	set<pii> open;
	for (ll i = 0; i < m; i++)
		events.pb({l[i], i, -1}), events.pb({r[i] + 1, i, 1});
	sort(events.begin(), events.end());


	ll it = 0;

	for (ll i = 0; i < n; i++){
		while(it < events.size() && events[it][0] == i){
			ll t = events[it][2], ind = events[it][1];
			if (t == -1) open.insert({-y[ind], ind});
			else open.erase({-y[ind], ind});
			it++;
		}

		auto it2 = open.lower_bound({-h[i], 0});
		while(it2 != open.end()){
			polls[i].pb(-it2->st);
			ll ind = it2->nd;
			if (last[ind] != -1){
				adj[i].pb({y[ind], last[ind]});
				adj[last[ind]].pb({y[ind], i});
			}
			last[ind] = i;
			it2++;
		}
		polls[i].pb(0);
	}

	for (ll i = 0; i < n; i++){
		sort(polls[i].begin(), polls[i].end());
		sort(adj[i].begin(), adj[i].end());
	}

	priority_queue<array<long long, 3>> q;
	q.push({0, s, 0});
	dist[s][0] = 0;
		/*
	for (ll i = 0; i < n; i++){
		cout<<i<<" : ";
		for (auto j : polls[i]) cout<<j<<sp;
		cout<<endl;
	}*/
	while(!q.empty()){
		array<ll, 3> tmp = q.top();
		q.pop();
		long long X = tmp[1], y = tmp[2], d = -tmp[0];
		if (dist[X][y] < d) continue;
		//cout<<X<<sp<<y<<sp<<d<<endl;
		ll pos = lower_bound(polls[X].begin(), polls[X].end(), y) - polls[X].begin();
		if (pos > 0){
			ll to = polls[X][pos - 1];
			ll tmp = d + abs(to - y);
			if (dist[X].count(to) == 0 || dist[X][to] > tmp){
				dist[X][to] = tmp;
				q.push({-tmp, X, to});
			}
		}
		if (pos < polls[X].size()){
			ll to = polls[X][pos + 1];
			ll tmp = d + abs(to - y);
			if (dist[X].count(to) == 0 || dist[X][to] > tmp){
				dist[X][to] = tmp;
				q.push({-tmp, X, to});
			}
		}

		pos = lower_bound(adj[X].begin(), adj[X].end(), make_pair(y, (ll)0)) - adj[X].begin();
		while(pos < adj[X].size() && adj[X][pos].st == y){
			ll to = adj[X][pos].nd;
			ll tmp = d + abs(x[X] - x[to]);
			if (dist[to].count(y) == 0 || dist[to][y] > tmp){
				dist[to][y] = tmp;
				q.push({-tmp, to, y});
			}
			pos++;
		}
	}

	if (dist[g].count(0)) return dist[g][0];
	return -1;
}
/*

int main() {
	fileio();
	int n, m;
	assert(2 == scanf("%d%d", &n, &m));
	vector<int> x(n), h(n);
	for (int i = 0; i < n; i++)
		assert(2 == scanf("%d%d", &x[i], &h[i]));
	vector<int> l(m), r(m), y(m);
	for (int i = 0; i < m; i++)
		assert(3 == scanf("%d%d%d", &l[i], &r[i], &y[i]));
	int s, g;
	assert(2 == scanf("%d%d", &s, &g));
	fclose(stdin);

	long long result = min_distance(x, h, l, r, y, s, g);

	printf("%lld\n", result);
	fclose(stdout);
	return 0;
}
*/

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:37:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::array<long long int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   while(it < events.size() && events[it][0] == i){
      |         ~~~^~~~~~~~~~~~~~~
walk.cpp:87:11: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |   if (pos < polls[X].size()){
      |       ~~~~^~~~~~~~~~~~~~~~~
walk.cpp:97:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |   while(pos < adj[X].size() && adj[X][pos].st == y){
      |         ~~~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 496 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 554 ms 91548 KB Output is correct
4 Correct 324 ms 106936 KB Output is correct
5 Correct 101 ms 50732 KB Output is correct
6 Correct 106 ms 48252 KB Output is correct
7 Correct 100 ms 50716 KB Output is correct
8 Correct 833 ms 113408 KB Output is correct
9 Correct 146 ms 56256 KB Output is correct
10 Correct 537 ms 144320 KB Output is correct
11 Correct 200 ms 53952 KB Output is correct
12 Correct 94 ms 48316 KB Output is correct
13 Correct 398 ms 133308 KB Output is correct
14 Correct 78 ms 29116 KB Output is correct
15 Correct 111 ms 49592 KB Output is correct
16 Incorrect 108 ms 48064 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 13764 KB Output is correct
2 Execution timed out 4089 ms 363680 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 13764 KB Output is correct
2 Execution timed out 4089 ms 363680 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 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 496 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 554 ms 91548 KB Output is correct
21 Correct 324 ms 106936 KB Output is correct
22 Correct 101 ms 50732 KB Output is correct
23 Correct 106 ms 48252 KB Output is correct
24 Correct 100 ms 50716 KB Output is correct
25 Correct 833 ms 113408 KB Output is correct
26 Correct 146 ms 56256 KB Output is correct
27 Correct 537 ms 144320 KB Output is correct
28 Correct 200 ms 53952 KB Output is correct
29 Correct 94 ms 48316 KB Output is correct
30 Correct 398 ms 133308 KB Output is correct
31 Correct 78 ms 29116 KB Output is correct
32 Correct 111 ms 49592 KB Output is correct
33 Incorrect 108 ms 48064 KB Output isn't correct
34 Halted 0 ms 0 KB -