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Submission #835127

# Submission time Handle Problem Language Result Execution time Memory
835127 2023-08-23T08:50:02 Z Hydrolyzed Crocodile's Underground City (IOI11_crocodile) C++14
0 / 100
 2 ms 4180 KB 
#include "crocodile.h"
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int MxN = 100010;

struct state_t {
	int v;
	ll w;
	bool operator < (const state_t &o) const {
		return w > o.w;
	}
	state_t(int _v, ll _w):
		v(_v), w(_w) {}
};

vector<pair<int, ll>> adj[MxN];
priority_queue<state_t> pq;
ll dist[MxN][2]; // [0] = best, [1] = secondary

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
	for(int i=0; i<M; ++i) {
		adj[R[i][0]].emplace_back(R[i][1], L[i]);
		adj[R[i][1]].emplace_back(R[i][0], L[i]);
	}
	memset(dist, 0x3f, sizeof dist);
	for(int i=0; i<K; ++i) {
		pq.emplace(P[i], dist[P[i]][0] = 0ll);
	}
	while(!pq.empty()) {
		state_t now = pq.top(); pq.pop();
		for(auto x: adj[now.v]) {
			ll nxt = now.w + x.second;
			if(dist[x.first][0] > nxt) {
				if(dist[x.first][0] < 1e18 + 100) {
					pq.emplace(x.first, dist[x.first][1] = dist[x.first][0]);
				}
				dist[x.first][0] = nxt;
			}
			else if(dist[x.first][1] > nxt){
				pq.emplace(x.first, dist[x.first][1] = nxt);
			}
		}
	}
	return dist[0][1];
}

Subtask #1
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Incorrect 2 ms 4180 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Incorrect 2 ms 4180 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Incorrect 2 ms 4180 KB Output isn't correct
4 Halted 0 ms 0 KB -