Submission #76878

#	Time	Username	Problem	Language	Result	Execution time	Memory
76878		shoemakerjo	Crocodile's Underground City (IOI11_crocodile)	C++14	89 / 100	816 ms	73184 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define pii pair<ll, int>
#define maxn 100010
const ll bil = 2000000000LL;
vector<vector<pii>> adj(maxn);
ll dist[maxn][2];
priority_queue<pii, vector<pii>, greater<pii>> pq;

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
	for (int i = 0; i < N; i++) {
		dist[i][0] = dist[i][1] = bil;
	}
	int v;
	for (int i = 0; i < K; i++) {
		v = P[i];
		dist[v][0] = dist[v][1] = 0;
		pq.push(pii(0, v));
	}

	for (int i = 0; i < M; i++) {
		adj[R[i][0]].push_back(pii(R[i][1], L[i]));
		adj[R[i][1]].push_back(pii(R[i][0], L[i]));
	}

	ll d;
	while (!pq.empty()) {
		d = pq.top().first;
		v = pq.top().second;
		// cout << v << " : " << d << endl;
		pq.pop();
		if (dist[v][1] < d) continue;

		for (pii vv : adj[v]) {
			if (d + vv.second < dist[vv.first][0]) {
				dist[vv.first][1] = dist[vv.first][0];
				dist[vv.first][0] = d + vv.second;
				if (dist[vv.first][1] != bil) 
					pq.push(pii(dist[vv.first][1], vv.first));
			}
			else if (d + vv.second < dist[vv.first][1]) {
				dist[vv.first][1] = d + vv.second;
				if (dist[vv.first][1] != bil) 
					pq.push(pii(dist[vv.first][1], vv.first));
			}
		}

	}


	return dist[0][1];
}

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 0 / 11