Submission #672552

#	Time	Username	Problem	Language	Result	Execution time	Memory
672552		mmk	Crocodile's Underground City (IOI11_crocodile)	C++14	46 / 100	5 ms	5076 KiB

crocodile

#include "crocodile.h"
#include<bits/stdc++.h>
#define INF 0x3f3f3f3f3f3f3f3f
#define ll long long
using namespace std;
const ll MAXN = 1e5+10;
ll Dist1[MAXN], Dist2[MAXN];
bool marc[MAXN];
vector<ll> grafo[MAXN];
vector<ll> weight[MAXN];
int travel_plan(int n, int m, int R[][2], int L[], int K, int P[])
{
	for(ll i = 0; i < n; i++)
	{
		ll a = R[i][0];
		ll b = R[i][1];
		grafo[a].push_back(b);
		grafo[b].push_back(a);
		weight[a].push_back(L[i]);
		weight[b].push_back(L[i]);
	}
	
	set<pair<ll,ll>> s;
	for(ll i = 0; i < n; i++)
	{
		Dist1[i] = INF;
		Dist2[i] = INF;
	}
	for(ll i = 0; i < K; i++)
	{
		Dist1[P[i]] = 0;
		Dist2[P[i]] = 0;
		s.emplace(0,P[i]);
	}
	while(!s.empty())
	{
		ll cur = s.begin()->second;
		s.erase(s.begin());
		if(marc[cur]) continue;
		marc[cur] = true;
		for(ll i = 0; i < grafo[cur].size(); i++)
		{
			ll viz = grafo[cur][i];
			ll p = weight[cur][i];
			if(Dist2[cur] + p < Dist1[viz])
			{
				Dist2[viz] = Dist1[viz];
				Dist1[viz] = Dist2[cur] + p;
				s.emplace(Dist2[viz],viz);
			}
			else if(Dist2[cur] + p < Dist2[viz])
			{
				Dist2[viz] = Dist2[cur] + p;
				s.emplace(Dist2[viz],viz);
			}
		}
	}
	return Dist2[0];
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:41:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   for(ll i = 0; i < grafo[cur].size(); i++)
      |                 ~~^~~~~~~~~~~~~~~~~~~

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