Submission #127795

#	Time	Username	Problem	Language	Result	Execution time	Memory
127795		tinjyu	Gondola (IOI14_gondola)	C++14	90 / 100	28 ms	4984 KiB

gondola

#include "gondola.h"
#include <iostream>
using namespace std;
long long int ans[1000005];
long long int a[1000005],b[1000005],n;
int qs(int s,int e)
{
	if(s>=e)return 0;
	int l=s,r=e,mid=(a[l]+a[r])/2;
	while(l<=r)
	{
		while(a[l]<mid)l++;
		while(a[r]>mid)r--;
		if(l<=r)
		{
			swap(a[l],a[r]);
			swap(b[l],b[r]);
			l++;
			r--;
		}
	}
	qs(s,r);
	qs(l,e);
}
int valid(int N, int a[])
{
	n=N;
	int tmp=-1,mi=500005,tag[500005];
	for(int i=0;i<=500000;i++)tag[i]=0;
	for(int i=0;i<n;i++)
	{
		if(tag[a[i]]==1)return 0;
		tag[a[i]]++;
	}
	for(int i=0;i<n;i++)
	if(a[i]<=n && a[i]<mi)
	{
		tmp=i;
		mi=a[i];
	}
	if(tmp==-1)return 1;
	int p=n-1,i=tmp,t=mi;
	while(p--)
	{
		i++;
		i%=n;
		t++;
		if(a[i]<=n && a[i]!=t)return 0;
	}
 
	return 1;
}
 
 
//----------------------
 
int replacement(int N, int gondolaSeq[], int replacementSeq[])
{
	n=N;
	int t=-1;
	for(int i=0;i<n;i++)a[i]=gondolaSeq[i];
	for(int i=0;i<n;i++)
	{
		if(a[i]<=n)
		{
			t=i;
			break;
		}
	}
	if(t==-1)for(int i=0;i<n;i++)b[i]=i+1;
	else
	{
		b[t]=a[t];
		int now=a[t],i=t;
		int p=n-1;
		while(p--)
		{
			i++;
			i%=n;
			now=now%n+1;
			b[i]=now;
		}
	}
	//for(int i=0;i<n;i++)cout<<a[i]<<" "<<b[i]<<endl;
	qs(0,n-1);
	//for(int i=0;i<n;i++)cout<<a[i]<<" "<<b[i]<<endl;
	int ans1=0,x=n+1;
	for(int i=0;i<n;i++)
	{
		while(a[i]!=b[i])
		{
			
			replacementSeq[ans1]=b[i];
			b[i]=x;
			ans1++;
			x++;
		}
	}
  	return ans1;
}
 
//----------------------
 
int countReplacement(int N, int inputSeq[])
{
	if(valid(N,inputSeq)==0)return 0;
	n=N;
	int t=-1;
	for(int i=0;i<n;i++)a[i]=inputSeq[i];
	for(int i=0;i<n;i++)
	{
		if(a[i]<=n)
		{
			t=i;
			break;
		}
	}
	long long int ans1=1,x=n+1,tmp;
	if(t==-1)
	{
		for(int i=0;i<n;i++)b[i]=i+1;
		ans1=(ans1*n)%1000000009;
	}
	else
	{
		b[t]=a[t];
		long long int now=a[t],i=t;
		long long int p=n-1;
		while(p--)
		{
			i++;
			i%=n;
			now=now%n+1;
			b[i]=now;
		}
	}
	//for(int i=0;i<n;i++)cout<<a[i]<<" "<<b[i]<<endl;
	qs(0,n-1);
	//for(int i=0;i<n;i++)cout<<a[i]<<" "<<b[i]<<endl;
	
	
	for(long long int i=0;i<n;i++)
	{
		tmp=0;
		while(a[i]!=b[i])
		{
			
			b[i]=x;
			tmp++;
			x++;
		}
		if(tmp!=0)
		{
			ans[0]++;
			ans[ans[0]]=tmp;
		}
	}
	for(long long int i=1;i<=ans[0];i++)
	{
		//cout<<ans[i]<<" ";
		for(long long int j=1;j<=ans[i]-1;j++)ans1=(ans1*(ans[0]-i+1))%1000000009;
	}
  	return ans1;
}

Compilation message (stderr)

gondola.cpp: In function 'int qs(int, int)':
gondola.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 15 / 15
• Subtask 10: 0 / 10