oj.uz

Submission #768618

# Submission time Handle Problem Language Result Execution time Memory
768618 2023-06-28T10:03:08 Z marvinthang Sky Walking (IOI19_walk) C++17
15 / 100
 437 ms 55992 KB 
#include "walk.h"
/*************************************
*    author: marvinthang             *
*    created: 28.06.2023 15:43:09    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i--; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
template <class A, class B> bool minimize(A &a, B b)  { if (a > b) { a = b; return true; } return false; }
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }

// end of template

const long long INF = 1e18;

long long min_distance(vector <int> x, vector <int> h, vector <int> l, vector <int> r, vector <int> y, int s, int g) {
	int n = x.size();
	int m = l.size();
	vector <vector <int>> startAt(n), endAt(n);
	REP(i, m) {
		startAt[l[i]].push_back(i);
		endAt[r[i]].push_back(i);
	}
	map <int, int> heights;
	vector <vector <int>> yy(n);
	vector <vector <pair <int, int>>> adj;
	vector <int> pref(n);
	auto add_edge = [&] (int u, int v, int w) {
		adj[u].emplace_back(w, v);
		adj[v].emplace_back(w, u);
	};
	REP(i, n) {
		if (i) pref[i] = pref[i - 1] + yy[i - 1].size();
		if (i == s || i == g) {
			yy[i].push_back(0);
			for (int j: startAt[i]) yy[i].push_back(y[j]);
			for (auto it: heights) yy[i].push_back(it.fi);
			sort(ALL(yy[i]));
			yy[i].erase(unique(ALL(yy[i])), yy[i].end());
			adj.resize(pref[i] + yy[i].size());
			REP(j, (int) yy[i].size() - 1) add_edge(pref[i] + j, pref[i] + j + 1, yy[i][j + 1] - yy[i][j]);
		} else {
			for (int j: startAt[i]) {
				yy[i].push_back(y[j]);
				auto it = heights.lower_bound(y[j]);
				if (it != heights.end() && it->fi <= h[i]) yy[i].push_back(it->fi);
				if (it != heights.begin()) yy[i].push_back(prev(it)->fi);
			}
			sort(ALL(yy[i]));
			yy[i].erase(unique(ALL(yy[i])), yy[i].end());
			adj.resize(pref[i] + yy[i].size());
			for (int j: startAt[i]) {
				int p = lower_bound(ALL(yy[i]), y[j]) - yy[i].begin();
				if (p) add_edge(pref[i] + p - 1, pref[i] + p, yy[i][p] - yy[i][p - 1]);
				if (p + 1 < yy[i].size()) add_edge(pref[i] + p + 1, pref[i] + p, yy[i][p + 1] - yy[i][p]);
			}
		}

		REP(j, yy[i].size()) if (heights.count(yy[i][j])) {
			int k = heights[yy[i][j]];
			int p = lower_bound(ALL(yy[k]), yy[i][j]) - yy[k].begin();
			add_edge(pref[k] + p, pref[i] + j, x[i] - x[k]);
			heights[yy[i][j]] = i;
		}

		for (int j: endAt[i]) heights.erase(y[j]);
		for (int j: startAt[i]) heights[y[j]] = i;
	}
	priority_queue <pair <long long, int>, vector <pair <long long, int>>, greater <pair <long long, int>>> pq;
	vector <long long> dist(adj.size(), INF);
	pq.emplace(dist[pref[s]] = 0, pref[s]);
	while (!pq.empty()) {
		auto [du, u] = pq.top(); pq.pop();
		if (du != dist[u]) continue;
		for (auto [w, v]: adj[u]) if (minimize(dist[v], du + w)) pq.emplace(dist[v], v);
	}
	return dist[pref[g]] < INF ? dist[pref[g]] : -1;
}

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:89:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     if (p + 1 < yy[i].size()) add_edge(pref[i] + p + 1, pref[i] + p, yy[i][p + 1] - yy[i][p]);
      |         ~~~~~~^~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 9580 KB Output is correct
2 Correct 253 ms 27436 KB Output is correct
3 Correct 247 ms 28856 KB Output is correct
4 Correct 314 ms 42584 KB Output is correct
5 Correct 372 ms 43736 KB Output is correct
6 Correct 381 ms 45268 KB Output is correct
7 Correct 124 ms 26104 KB Output is correct
8 Correct 105 ms 33464 KB Output is correct
9 Correct 437 ms 51924 KB Output is correct
10 Correct 147 ms 36008 KB Output is correct
11 Correct 9 ms 4800 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 9580 KB Output is correct
2 Correct 253 ms 27436 KB Output is correct
3 Correct 247 ms 28856 KB Output is correct
4 Correct 314 ms 42584 KB Output is correct
5 Correct 372 ms 43736 KB Output is correct
6 Correct 381 ms 45268 KB Output is correct
7 Correct 124 ms 26104 KB Output is correct
8 Correct 105 ms 33464 KB Output is correct
9 Correct 437 ms 51924 KB Output is correct
10 Correct 147 ms 36008 KB Output is correct
11 Correct 9 ms 4800 KB Output is correct
12 Correct 258 ms 32888 KB Output is correct
13 Correct 240 ms 45640 KB Output is correct
14 Correct 365 ms 47888 KB Output is correct
15 Correct 198 ms 37552 KB Output is correct
16 Correct 199 ms 39476 KB Output is correct
17 Correct 231 ms 43668 KB Output is correct
18 Correct 200 ms 37560 KB Output is correct
19 Correct 246 ms 39452 KB Output is correct
20 Correct 136 ms 29164 KB Output is correct
21 Correct 21 ms 11732 KB Output is correct
22 Correct 171 ms 36976 KB Output is correct
23 Correct 140 ms 35556 KB Output is correct
24 Correct 101 ms 31128 KB Output is correct
25 Correct 131 ms 34804 KB Output is correct
26 Correct 100 ms 28508 KB Output is correct
27 Correct 368 ms 48500 KB Output is correct
28 Correct 192 ms 43664 KB Output is correct
29 Correct 422 ms 49320 KB Output is correct
30 Correct 123 ms 30248 KB Output is correct
31 Correct 429 ms 55992 KB Output is correct
32 Correct 115 ms 33560 KB Output is correct
33 Incorrect 112 ms 35836 KB Output isn't correct
34 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -