Submission #73730

#	Time	Username	Problem	Language	Result	Execution time	Memory
73730		TadijaSebez	Airline Route Map (JOI18_airline)	C++11	100 / 100	746 ms	30856 KiB

Alice

#include "Alicelib.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
void Alice(int n, int m, int a[], int b[])
{
	int L=10;
    vector<pair<int,int> > edges;
    int cen=n+L,den=n+L+1,i,j;
    for(i=0;i<L-1;i++) edges.pb(mp(n+i,n+i+1));
    vector<int> my(n,0);int k=0;
    for(i=0;i<n;i++)
	{
		while(__builtin_popcount(k)==9) k++;
		my[i]=k;
		edges.pb(mp(i,cen));
		edges.pb(mp(i,den));
		for(j=0;j<L;j++) if((my[i]>>j)&1) edges.pb(mp(i,n+j));
		k++;
	}
	for(i=0;i<L;i++) edges.pb(mp(n+i,den));
	for(i=0;i<m;i++) edges.pb(mp(a[i],b[i]));
	InitG(n+L+2,edges.size());
	for(i=0;i<edges.size();i++) MakeG(i,edges[i].first,edges[i].second);
}

Bob

#include "Boblib.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
vector<vector<int> > E;
vector<int> fk,val;
void DFS(int u, int p, int d)
{
	val[u]=d;
	for(int v:E[u]) if(v!=p && fk[v]==1) DFS(v,u,d+1);
}
bool has[1012][1012];
void AddEdge(int a, int b){ has[a][b]=has[b][a]=1;}
void Bob(int n, int m, int a[], int b[])
{
	int L=10,N=n-L-2,i;E.clear();E.resize(n);
	vector<int> deg(n,0),my(1012,0);
	for(i=0;i<m;i++) deg[a[i]]++,deg[b[i]]++,AddEdge(a[i],b[i]);
	for(i=0;i<m;i++) E[a[i]].pb(b[i]),E[b[i]].pb(a[i]);
	int den,cen;
	for(i=0;i<n;i++) if(deg[i]==n-2) den=i;
	for(i=0;i<n;i++)
	{
		if(i==den) continue;
		if(has[i][den]) continue;
		cen=i;
	}
	int k=0,con=0;
	for(i=0;i<N;i++)
	{
		while(__builtin_popcount(k)==9) k++;
		my[k]=i;con+=k&1;k++;
	}
	fk.resize(n);fk[cen]=fk[den]=2;val.resize(n);
	for(i=0;i<n;i++) if(i!=cen && i!=den && !has[cen][i]) fk[i]=1;
	int one;
	for(i=0;i<n;i++)
	{
		if(fk[i]==1)
		{
			int c=0,d=0;
			for(int v:E[i]){ if(fk[v]==0) c++;if(fk[v]==1) d++;}
			if(c==con && d==1) one=i;
		}
	}
	DFS(one,-1,0);
	for(i=0;i<n;i++) if(fk[i]==0)
	{
		for(int v:E[i]) if(fk[v]==1) val[i]+=1<<val[v];
	}
	vector<pair<int,int> > edges;
	for(i=0;i<m;i++)
	{
		if(fk[a[i]]==0 && fk[b[i]]==0) edges.pb(mp(my[val[a[i]]],my[val[b[i]]]));
	}
	InitMap(N,edges.size());
	for(i=0;i<edges.size();i++) MakeMap(edges[i].first,edges[i].second);
	for(i=0;i<m;i++) has[a[i]][b[i]]=has[b[i]][a[i]]=0;
}

Compilation message (stderr)

Alice.cpp: In function 'void Alice(int, int, int*, int*)':
Alice.cpp:26:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<edges.size();i++) MakeG(i,edges[i].first,edges[i].second);
          ~^~~~~~~~~~~~~

Bob.cpp: In function 'void Bob(int, int, int*, int*)':
Bob.cpp:59:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<edges.size();i++) MakeMap(edges[i].first,edges[i].second);
          ~^~~~~~~~~~~~~
Bob.cpp:48:5: warning: 'one' may be used uninitialized in this function [-Wmaybe-uninitialized]
  DFS(one,-1,0);
  ~~~^~~~~~~~~~
Bob.cpp:37:33: warning: 'den' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(i=0;i<n;i++) if(i!=cen && i!=den && !has[cen][i]) fk[i]=1;
                                ~^~~~~
Bob.cpp:37:23: warning: 'cen' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(i=0;i<n;i++) if(i!=cen && i!=den && !has[cen][i]) fk[i]=1;
                      ~^~~~~

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