Submission #828827

#	Time	Username	Problem	Language	Result	Execution time	Memory
828827		MohamedAhmed04	Airline Route Map (JOI18_airline)	C++14	0 / 100	459 ms	34928 KiB

Alice

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

using namespace std ;

void Alice(int n, int m, int a[], int b[] )
{
	vector< pair<int , int> >vp ;
	for(int i = 0 ; i < m ; ++i)
		vp.emplace_back(a[i] , b[i]) ;
	for(int bit = 0 ; bit < 10 ; ++bit)
	{
		for(int i = 0 ; i < n ; ++i)
		{
			if((i & (1 << bit)))
				vp.emplace_back(i , n+bit) ;
		}
	}
	for(int i = 0 ; i < n ; ++i)
		vp.emplace_back(i , n+10) ;
	for(int i = 0 ; i < n+10 ; ++i)
		vp.emplace_back(i , n+11) ;
	InitG(n+12 , vp.size()) ;
	int idx = 0 ;
	for(auto &p : vp)
		MakeG(idx , p.first , p.second) , ++idx ;
}

Bob

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

using namespace std ;

const int MAX = 2004 ;

int deg[MAX] , taken[MAX] , mark[MAX] ;
int val[MAX] ;

vector< vector<int> >adj(MAX) ;

void Bob( int V, int U, int C[], int D[] )
{
	int n = V-12 ;
	for(int i = 0 ; i < U ; ++i)
	{
		adj[C[i]].push_back(D[i]) ;
		adj[D[i]].push_back(C[i]) ;
		deg[C[i]]++ , deg[D[i]]++ ;
	}
	int last = -1 ;
	for(int i = 0 ; i < V ; ++i)
	{
		if(deg[i] == n+10)
			last = i ;
	}
	for(auto &node : adj[last])
		taken[node] = 1 ;
	int now ;
	for(int i = 0 ; i < V ; ++i)
	{
		if((!taken[i]) && i != last)
		{
			now = i ;
			break ;
		}
	}
	assert(deg[now] == n) ;
	for(auto &node : adj[now])
		mark[node] = 1 ;
	vector< pair<int , int> >bits ;
	for(int i = 0 ; i < V ; ++i)
	{
		if((!mark[i]) && i != now && i != last)
			bits.emplace_back(deg[i] , i) ;
	}
	sort(bits.begin() , bits.end()) ;
	reverse(bits.begin() , bits.end()) ;
	for(int i = 0 ; i < 10 ; ++i)
	{
		for(auto &node : adj[bits[i].second])
			val[node] |= (1 << i) ;
	}
	vector< pair<int , int> >ans ;
	for(int i = 0 ; i < U ; ++i)
	{
		int x = C[i] , y = D[i] ;
		if(mark[x] && mark[y])
			ans.emplace_back(val[x] , val[y]) ;
	}
	InitMap(n , ans.size()) ;
	for(auto &p : ans)
		MakeMap(p.first , p.second) ;
}

Compilation message (stderr)

Bob.cpp: In function 'void Bob(int, int, int*, int*)':
Bob.cpp:45:17: warning: 'now' may be used uninitialized in this function [-Wmaybe-uninitialized]
   45 |   if((!mark[i]) && i != now && i != last)
      |      ~~~~~~~~~~~^~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 15
• Subtask 3: 0 / 63