Submission #495120

#	Time	Username	Problem	Language	Result	Execution time	Memory
495120		mansur	Evacuation plan (IZhO18_plan)	C++14	35 / 100	4088 ms	32044 KiB

plan

#include<bits/stdc++.h>	
 
/*
#pragma optimize ("g",on)
#pragma GCC optimize("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
*/

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e18, N = 2e5 + 1, mod = 998244353;                    

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

main() {                                                         
	//freopen("cowrect.in", "r", stdin);                                                                                     
	//freopen("cowrect.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                        
	cin.tie(NULL);
	int n, m;
	cin >> n >> m;
	vector<pii> adj[n + 1];
	for (int i = 1; i <= m; i++) {
		int u, v, w;
		cin >> u >> v >> w;
		adj[u].pb({v, w});
		adj[v].pb({u, w});
	}
	int k;
	cin >> k;
	priority_queue<pii> s;
	vector<int> d(n + 1, inf);
	for (int i = 1; i <= k; i++) {
		int a;
		cin >> a;
		s.push({inf, a});
		d[a] = 0;
	}
	while (!s.empty()) {
		int u = s.top().ss;
		s.pop();
		for (auto e: adj[u]) {
			if (d[e.ff] > d[u] + e.ss) {
				d[e.ff] = d[u] + e.ss;
				s.push({inf - d[e.ff], e.ff});
			}
		}
	}
	int q;
	cin >> q;
	if ((q <= 200 && m <= 200 && n <= 15) || q == 1) {
		while (q--) {
			int u, v;
			cin >> u >> v;
			s.push({inf - d[u], u});
			vector<int> dst(n + 1, -inf);
			dst[u] = d[u];
			while (!s.empty()) {
				int u = s.top().ss;
				s.pop();
				for (auto e: adj[u]) {
				 	if (dst[e.ff] < min(dst[u], d[e.ff])) {
				 		dst[e.ff] = min(dst[u], d[e.ff]);
				 		s.push({inf - dst[e.ff], e.ff});
				 	}
				}	
			}
			cout << dst[v] << nl;
		}
	} else {
		while (q--) {
			int u, v;
			cin >> u >> v;
			cout << min(d[u], d[v]) << nl;
		}
	}
}                    	             

Compilation message (stderr)

plan.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main() {
      | ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 13 / 13
• Subtask 3: 12 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 46