Submission #158223

#	Time	Username	Problem	Language	Result	Execution time	Memory
158223		MvC	Split the Attractions (IOI19_split)	C++14	22 / 100	1036 ms	1048580 KiB

split

#include "split.h"
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e5+50;
const int mod=1e9+7;
using namespace std;
int sz[nmax],pr[nmax],a[5],n,nd,c1,c2,i,m;
vector<int>g[nmax],rs;
bitset<nmax>viz;
void dfs(int x,int p)
{
	sz[x]=1;
	pr[x]=p;
	for(int i=0;i<g[x].size();i++)
	{
		int y=g[x][i];
		if(y==p)continue;
		dfs(y,x);
		sz[x]+=sz[y];
	}
	for(int i=1;i<=3;i++)
	{
		for(int j=1;j<=3;j++)
		{
			if(i==j)continue;
			if(a[i]<=sz[x] && sz[x]<=a[i]+a[j])
			{
				nd=x;
				c1=i;
				c2=6-i-j;
			}
		}
	}
}
void col(int x,int c)
{
	if(!a[c])return;
	rs[x-1]=c;
	a[c]--;
	viz[x]=1;
	for(int i=0;i<g[x].size();i++)
	{
		int y=g[x][i];
		if(y==pr[x] || viz[y])continue;
		col(y,c);
	}
}
vector<int> find_split(int N,int A,int B,int C,vector<int>P,vector<int>Q) 
{
	n=N,a[1]=A,a[2]=B,a[3]=C,m=(int)P.size();
	for(i=0;i<m;i++)
	{
		P[i]++,Q[i]++;
		g[P[i]].pb(Q[i]);
		g[Q[i]].pb(P[i]);
	}
	nd=-1;
	dfs(1,0);
	for(i=1;i<=n;i++)rs.pb(0);
	if(nd!=-1)
	{
		col(nd,c1);
		col(1,c2);
		for(i=0;i<n;i++)if(!rs[i])rs[i]=6-c1-c2;
	}
	return rs;
}

Compilation message (stderr)

split.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
split.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
split.cpp: In function 'void dfs(int, int)':
split.cpp:29:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[x].size();i++)
              ~^~~~~~~~~~~~
split.cpp: In function 'void col(int, int)':
split.cpp:56:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[x].size();i++)
              ~^~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 22 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36