Submission #170846

#	Time	Username	Problem	Language	Result	Execution time	Memory
170846		Nightmar	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	10 / 100	2 ms	416 KiB

skyscraper

#include <iostream>
#include <algorithm>
#include <cmath>
#include <string>
#include <cstdlib>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <cstdio>
#include <iomanip>
 
#define SWS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pb push_back
#define ppb pop_back
#define ft first
#define sd second
#define read freopen("input.txt", "r", stdin)
#define write freopen("output.txt", "w", stdout)
#define files read; write
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
 
const int Z = (int)2e3 + 228;
const int N = (int)3e5 + 228;
const int INF = (int)1e9 + 228;
const int MOD = (int)1e9 + 7;
const ll LLINF = (ll)1e15 + 228;

int main()
{
	SWS;
	//files;
	int n, m;
	cin >> n >> m;
	vector<pii> v;
	for (int i = 0; i < m; i++)
	{
		int b, p;
		cin >> b >> p;
		v.pb({b, p});
	}
	set<pii> Q;
	Q.insert({0, 0});
	vector<int> dist(n, INF);
	dist[0] = 0;
	while (!Q.empty())
	{
		int ind = Q.begin()->sd;
		int now = Q.begin()->ft;
		Q.erase(Q.begin());
		for (int i = 0; i < m; i++)
			if (abs(v[i].ft - v[ind].ft) % v[ind].sd == 0)
			{
				int steps = abs(v[i].ft - v[ind].ft) / v[ind].sd;
				if (now + steps < dist[v[i].ft])
				{
					if (Q.find({dist[v[i].ft], i}) != Q.end()) Q.erase(Q.find({dist[v[i].ft], i}));
					dist[v[i].ft] = now + steps;
					Q.insert({dist[v[i].ft], i});
				}
			}
	}
	if (dist[v[1].ft] != INF) cout << dist[v[1].ft];
	else cout << -1;
	return 0;
}
/*
*/

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43