Submission #986317

#	Time	Username	Problem	Language	Result	Execution time	Memory
986317		Pyqe	Parrots (IOI11_parrots)	C++17	100 / 100	448 ms	14792 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>

using namespace std;

namespace
{
	long long mxn=64,ma=256,fq[256];
	bitset<512> a,cb[256][369];
	bool alr=0;
	
	bitset<512> ad(bitset<512> x,bitset<512> y)
	{
		long long i,k=0;
		
		for(i=0;i<mxn*8;i++)
		{
			k+=x[i]+y[i];
			x[i]=k&1;
			k>>=1;
		}
		return x;
	}
	
	bitset<512> sb(bitset<512> x,bitset<512> y)
	{
		long long i,j,k=0;
		
		for(i=mxn*8-1;i+1;i--)
		{
			if(y[i])
			{
				for(j=i;!x[j];j++)
				{
					x[j]=1;
				}
				x[j]=0;
			}
		}
		return x;
	}
	
	bool chk(bitset<512> x,bitset<512> y)
	{
		long long i;
		
		for(i=mxn*8-1;i+1;i--)
		{
			if(x[i]<y[i])
			{
				return 1;
			}
			else if(x[i]>y[i])
			{
				return 0;
			}
		}
		return 0;
	}
	
	void bd()
	{
		long long i,j;
		
		alr=1;
		cb[0][0][0]=1;
		for(i=1;i<ma;i++)
		{
			for(j=0;j<=mxn*5;j++)
			{
				cb[i][j]=cb[i-1][j];
				if(j)
				{
					cb[i][j]=ad(cb[i][j],cb[i][j-1]);
				}
			}
		}
	}
}

void encode(int n,int aa[])
{
	long long i,j,sm=n*5;
	
	if(!alr)
	{
		bd();
	}
	for(i=0;i<n;i++)
	{
		for(j=0;j<8;j++)
		{
			a[i*8+j]=aa[i]&1;
			aa[i]>>=1;
		}
	}
	for(i=0;i<ma;i++)
	{
		for(j=0;!chk(a,cb[ma-i-1][sm]);j++)
		{
			a=sb(a,cb[ma-i-1][sm]);
			sm--;
		}
		for(;j;j--)
		{
			send(i);
		}
	}
}

decoder

#include "encoder.h"
#include "encoderlib.h"
#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>

using namespace std;

namespace
{
	long long mxn=64,ma=256,fq[256];
	bitset<512> a,cb[256][369];
	bool alr=0;
	
	bitset<512> ad(bitset<512> x,bitset<512> y)
	{
		long long i,k=0;
		
		for(i=0;i<mxn*8;i++)
		{
			k+=x[i]+y[i];
			x[i]=k&1;
			k>>=1;
		}
		return x;
	}
	
	bitset<512> sb(bitset<512> x,bitset<512> y)
	{
		long long i,j,k=0;
		
		for(i=mxn*8-1;i+1;i--)
		{
			if(y[i])
			{
				for(j=i;!x[j];j++)
				{
					x[j]=1;
				}
				x[j]=0;
			}
		}
		return x;
	}
	
	bool chk(bitset<512> x,bitset<512> y)
	{
		long long i;
		
		for(i=mxn*8-1;i+1;i--)
		{
			if(x[i]<y[i])
			{
				return 1;
			}
			else if(x[i]>y[i])
			{
				return 0;
			}
		}
		return 0;
	}
	
	void bd()
	{
		long long i,j;
		
		alr=1;
		cb[0][0][0]=1;
		for(i=1;i<ma;i++)
		{
			for(j=0;j<=mxn*5;j++)
			{
				cb[i][j]=cb[i-1][j];
				if(j)
				{
					cb[i][j]=ad(cb[i][j],cb[i][j-1]);
				}
			}
		}
	}
}

void decode(int n,int m,int aa[])
{
	long long i,j,k,sm=n*5;
	
	if(!alr)
	{
		bd();
	}
	for(i=0;i<m;i++)
	{
		fq[aa[i]]++;
	}
	for(i=0;i<ma;i++)
	{
		for(j=0;j<fq[i];j++)
		{
			a=ad(a,cb[ma-i-1][sm]);
			sm--;
		}
		fq[i]=0;
	}
	for(i=0;i<n;i++)
	{
		k=0;
		for(j=0;j<8;j++)
		{
			k|=a[i*8+j]<<j;
			a[i*8+j]=0;
		}
		output(k);
	}
}

Compilation message (stderr)

encoder.cpp: In function 'std::bitset<512> {anonymous}::sb(std::bitset<512>, std::bitset<512>)':
encoder.cpp:30:17: warning: unused variable 'k' [-Wunused-variable]
   30 |   long long i,j,k=0;
      |                 ^
encoder.cpp: At global scope:
encoder.cpp:11:26: warning: '{anonymous}::fq' defined but not used [-Wunused-variable]
   11 |  long long mxn=64,ma=256,fq[256];
      |                          ^~

decoder.cpp: In function 'std::bitset<512> {anonymous}::sb(std::bitset<512>, std::bitset<512>)':
decoder.cpp:30:17: warning: unused variable 'k' [-Wunused-variable]
   30 |   long long i,j,k=0;
      |                 ^
decoder.cpp: At global scope:
decoder.cpp:46:7: warning: 'bool {anonymous}::chk(std::bitset<512>, std::bitset<512>)' defined but not used [-Wunused-function]
   46 |  bool chk(bitset<512> x,bitset<512> y)
      |       ^~~
decoder.cpp:28:14: warning: 'std::bitset<512> {anonymous}::sb(std::bitset<512>, std::bitset<512>)' defined but not used [-Wunused-function]
   28 |  bitset<512> sb(bitset<512> x,bitset<512> y)
      |              ^~

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 19 / 19