oj.uz

Submission #47179

# Submission time Handle Problem Language Result Execution time Memory
47179 2018-04-28T14:25:17 Z platypus Jakarta Skyscrapers (APIO15_skyscraper) C++17
36 / 100
 1000 ms 127564 KB 
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <cstring>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <list>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <unordered_set>
#include <unordered_map>
#include <array>
#include <cassert>
#include <bitset>
using namespace std;
using LL = long long;

namespace std {
	template <>
	class hash<std::pair<int, int>> {
	public:
		size_t operator()(const std::pair<int, int>& x) const {
			//return hash<int>()(x.first) ^ hash<int>()(x.second);
			return (size_t)(x.second ^ x.first + 0x9e3779b9 + (x.second << 6) + (x.second >> 2));
		}
	};
}

//Vは比較可能な値にする
template <typename V>
class Graph {
private:
	//unordered_map<V, vector<pair<V, LL>>>edge;
	vector<pair<pair<V, V>, LL>>raw;
	vector<V>vset;
public:
	//from->toへcostの辺を張る
	void addEdge(V from, V to, LL cost) {
		//edge[from].push_back(make_pair(to, cost));
		raw.push_back(make_pair(make_pair(from, to), cost));
		vset.push_back(from);
		vset.push_back(to);
	}
	//v1とv2間にcostの辺を張る
	void addUndirectedEdge(V v1, V v2, LL cost) {
		//edge[v1].push_back(make_pair(v2, cost));
		//edge[v2].push_back(make_pair(v1, cost));
		raw.push_back(make_pair(make_pair(v1, v2), cost));
		raw.push_back(make_pair(make_pair(v2, v1), cost));
		vset.push_back(v1);
		vset.push_back(v2);
	}
	//最短を求める
	LL dijkstra(V start, V finish) {
		sort(vset.begin(), vset.end());
		vset.erase(unique(vset.begin(), vset.end()), vset.end());
		int vnum = vset.size();
		vector<LL>disti(vnum, LLONG_MAX / 9);
		map<V, int>inv;
		for (int i = 0; i < vnum; ++i) {
			inv[vset[i]] = i;
		}
		vector<vector<pair<int, LL>>>edgei(vnum);
		for (auto& e : raw) {
			edgei[inv[e.first.first]].push_back(make_pair(inv[e.first.second], e.second));
		}
		//dist[start] = 0;
		//priority_queue<pair<LL, V>, vector<pair<LL, V>>, greater<pair<LL, V>>>que;
		disti[inv[start]] = 0;
		priority_queue<pair<LL, int>, vector<pair<LL, int>>, greater<pair<LL, int>>>que;
		que.push(make_pair(0LL, inv[start]));
		while (!que.empty()) {
			auto q = que.top();
			que.pop();
			int now = q.second;
			LL dis = q.first;
			if (disti[now] < dis) continue;
			for (auto e : edgei[now]) {
				int nxt = e.first;
				LL cost = e.second;
				if (/*!disti.count(nxt)  ||*/ disti[nxt] > disti[now] + cost) {
					disti[nxt] = disti[now] + cost;
					que.push(make_pair(disti[nxt], nxt));
				}
			}
		}
		for (int i = 0; i < vnum; ++i) {
			//dist[vset[i]] = disti[i];
			if (vset[i] == finish) {
				return disti[i];
			}
		}
		abort();
	}
};

int N, M;

int mceil(int a, int b) {
	if (a == 0)return 0;
	return (a - 1) / b + 1;
}

int main(void)
{
	//cin >> N >> M;
	scanf("%d %d", &N, &M);
	using P = pair<int, int>;
	map<P, vector<int>>mp;
	int st = -1;
	int enb = -1, enp = -1, enr = -1;
	for (int i = 0; i < M; ++i) {
		int b, p;
		//cin >> b >> p;
		scanf("%d %d", &b, &p);
		if (i == 0)st = b;
		if (i == 1) {
			enb = b;
			enp = p;
			enr = b % p;
		}
		int rem = b % p;
		mp[make_pair(p, rem)].push_back(b);
	}
	Graph<P>G;
	for (auto elm : mp) {
		int p = elm.first.first;
		int rem = elm.first.second;
		auto& v = elm.second;
		int len = mceil(N - rem, p);
		vector<LL>dist(len, INT_MAX);
		for (int x : v)dist[x / p] = 0;
		/*for (int i = 1; i < len; ++i) {
			dist[i] = min(dist[i - 1] + 1, dist[i]);
		}
		for (int i = len - 1; i > 0; --i) {
			dist[i - 1] = min(dist[i] + 1, dist[i - 1]);
		}*/
		for (int i = 0; i < len; ++i) {
			if (dist[i] < INT_MAX)G.addEdge(P(0, i * p + rem), P(p, i * p + rem), dist[i]);
			G.addEdge(P(p, i * p + rem), P(0, i * p + rem), 0LL);
		}
		for (int i = 1; i < len; ++i) {
			G.addUndirectedEdge(P(p, (i - 1)*p + rem), P(p, i*p + rem), 1LL);
		}
	}
	int len = mceil(N - enr, enp);
	for (int i = 0; i < len; ++i) {
		if (abs(i - (enb / enp)) == 0)
			G.addEdge(P(0, i * enp + enr), P(N, i * enp + enr), abs(i - (enb / enp)));
	}
	P endv{};
	for (int i = 0; i < len; ++i) {
		if (abs(i - (enb / enp)) == 0)
			endv = P(N, i * enp + enr);
	}
	LL ans = G.dijkstra(P(0, st), endv);
	if (ans >= LLONG_MAX / 9) {
		//cout << -1 << endl;
		printf("-1\n");
	}
	else {
		//cout << ans << endl;
		printf("%lld\n", ans);
	}
	return 0;
}

Compilation message

skyscraper.cpp: In member function 'std::size_t std::hash<std::pair<int, int> >::operator()(const std::pair<int, int>&) const':
skyscraper.cpp:36:70: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    return (size_t)(x.second ^ x.first + 0x9e3779b9 + (x.second << 6) + (x.second >> 2));
                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:119:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:127:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &b, &p);
   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 472 KB Output is correct
3 Correct 2 ms 548 KB Output is correct
4 Correct 2 ms 548 KB Output is correct
5 Correct 2 ms 548 KB Output is correct
6 Correct 2 ms 548 KB Output is correct
7 Correct 2 ms 548 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 560 KB Output is correct
2 Correct 2 ms 560 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 752 KB Output is correct
9 Correct 2 ms 752 KB Output is correct
10 Correct 4 ms 1020 KB Output is correct
11 Correct 9 ms 1848 KB Output is correct
12 Correct 4 ms 1848 KB Output is correct
13 Correct 2 ms 1848 KB Output is correct
14 Correct 12 ms 2360 KB Output is correct
15 Correct 14 ms 2360 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2360 KB Output is correct
2 Correct 2 ms 2360 KB Output is correct
3 Correct 2 ms 2360 KB Output is correct
4 Correct 2 ms 2360 KB Output is correct
5 Correct 2 ms 2360 KB Output is correct
6 Correct 2 ms 2360 KB Output is correct
7 Correct 2 ms 2360 KB Output is correct
8 Correct 2 ms 2360 KB Output is correct
9 Correct 2 ms 2360 KB Output is correct
10 Correct 5 ms 2360 KB Output is correct
11 Correct 9 ms 2360 KB Output is correct
12 Correct 2 ms 2360 KB Output is correct
13 Correct 2 ms 2360 KB Output is correct
14 Correct 34 ms 2360 KB Output is correct
15 Correct 11 ms 2360 KB Output is correct
16 Correct 7 ms 2360 KB Output is correct
17 Correct 30 ms 4780 KB Output is correct
18 Correct 13 ms 4780 KB Output is correct
19 Correct 12 ms 4780 KB Output is correct
20 Correct 6 ms 4780 KB Output is correct
21 Correct 5 ms 4780 KB Output is correct
22 Correct 14 ms 4780 KB Output is correct
23 Correct 14 ms 4780 KB Output is correct
24 Correct 25 ms 4780 KB Output is correct
25 Correct 16 ms 4780 KB Output is correct
26 Correct 16 ms 4780 KB Output is correct
27 Correct 13 ms 4780 KB Output is correct
28 Correct 44 ms 7204 KB Output is correct
29 Correct 156 ms 17552 KB Output is correct
30 Correct 38 ms 17552 KB Output is correct
31 Correct 79 ms 17552 KB Output is correct
32 Correct 53 ms 17552 KB Output is correct
33 Correct 307 ms 33800 KB Output is correct
34 Correct 308 ms 33832 KB Output is correct

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 33832 KB Output is correct
2 Correct 2 ms 33832 KB Output is correct
3 Correct 2 ms 33832 KB Output is correct
4 Correct 2 ms 33832 KB Output is correct
5 Correct 2 ms 33832 KB Output is correct
6 Correct 2 ms 33832 KB Output is correct
7 Correct 2 ms 33832 KB Output is correct
8 Correct 2 ms 33832 KB Output is correct
9 Correct 2 ms 33832 KB Output is correct
10 Correct 4 ms 33832 KB Output is correct
11 Correct 11 ms 33832 KB Output is correct
12 Correct 3 ms 33832 KB Output is correct
13 Correct 3 ms 33832 KB Output is correct
14 Correct 11 ms 33832 KB Output is correct
15 Correct 11 ms 33832 KB Output is correct
16 Correct 7 ms 33832 KB Output is correct
17 Correct 29 ms 33832 KB Output is correct
18 Correct 13 ms 33832 KB Output is correct
19 Correct 9 ms 33832 KB Output is correct
20 Correct 6 ms 33832 KB Output is correct
21 Correct 6 ms 33832 KB Output is correct
22 Correct 11 ms 33832 KB Output is correct
23 Correct 13 ms 33832 KB Output is correct
24 Correct 25 ms 33832 KB Output is correct
25 Correct 16 ms 33832 KB Output is correct
26 Correct 23 ms 33832 KB Output is correct
27 Correct 14 ms 33832 KB Output is correct
28 Correct 44 ms 33832 KB Output is correct
29 Correct 173 ms 33832 KB Output is correct
30 Correct 41 ms 33832 KB Output is correct
31 Correct 81 ms 33832 KB Output is correct
32 Correct 55 ms 33832 KB Output is correct
33 Correct 322 ms 33832 KB Output is correct
34 Correct 311 ms 33832 KB Output is correct
35 Correct 284 ms 33832 KB Output is correct
36 Correct 44 ms 33832 KB Output is correct
37 Correct 483 ms 49900 KB Output is correct
38 Correct 459 ms 49900 KB Output is correct
39 Correct 461 ms 49900 KB Output is correct
40 Correct 456 ms 49900 KB Output is correct
41 Correct 459 ms 49900 KB Output is correct
42 Correct 20 ms 49900 KB Output is correct
43 Correct 20 ms 49900 KB Output is correct
44 Correct 16 ms 49900 KB Output is correct
45 Execution timed out 1092 ms 126624 KB Time limit exceeded
46 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 126624 KB Output is correct
2 Correct 2 ms 126624 KB Output is correct
3 Correct 2 ms 126624 KB Output is correct
4 Correct 2 ms 126624 KB Output is correct
5 Correct 2 ms 126624 KB Output is correct
6 Correct 2 ms 126624 KB Output is correct
7 Correct 2 ms 126624 KB Output is correct
8 Correct 2 ms 126624 KB Output is correct
9 Correct 2 ms 126624 KB Output is correct
10 Correct 4 ms 126624 KB Output is correct
11 Correct 9 ms 126624 KB Output is correct
12 Correct 3 ms 126624 KB Output is correct
13 Correct 2 ms 126624 KB Output is correct
14 Correct 12 ms 126624 KB Output is correct
15 Correct 12 ms 126624 KB Output is correct
16 Correct 8 ms 126624 KB Output is correct
17 Correct 34 ms 126624 KB Output is correct
18 Correct 14 ms 126624 KB Output is correct
19 Correct 11 ms 126624 KB Output is correct
20 Correct 6 ms 126624 KB Output is correct
21 Correct 7 ms 126624 KB Output is correct
22 Correct 11 ms 126624 KB Output is correct
23 Correct 15 ms 126624 KB Output is correct
24 Correct 36 ms 126624 KB Output is correct
25 Correct 16 ms 126624 KB Output is correct
26 Correct 15 ms 126624 KB Output is correct
27 Correct 15 ms 126624 KB Output is correct
28 Correct 45 ms 126624 KB Output is correct
29 Correct 146 ms 126624 KB Output is correct
30 Correct 42 ms 126624 KB Output is correct
31 Correct 80 ms 126624 KB Output is correct
32 Correct 53 ms 126624 KB Output is correct
33 Correct 330 ms 126624 KB Output is correct
34 Correct 318 ms 126624 KB Output is correct
35 Correct 279 ms 126624 KB Output is correct
36 Correct 40 ms 126624 KB Output is correct
37 Correct 479 ms 126624 KB Output is correct
38 Correct 462 ms 126624 KB Output is correct
39 Correct 457 ms 126624 KB Output is correct
40 Correct 445 ms 126624 KB Output is correct
41 Correct 453 ms 126624 KB Output is correct
42 Correct 20 ms 126624 KB Output is correct
43 Correct 19 ms 126624 KB Output is correct
44 Correct 12 ms 126624 KB Output is correct
45 Execution timed out 1088 ms 127564 KB Time limit exceeded
46 Halted 0 ms 0 KB -