Submission #347335

#	Time	Username	Problem	Language	Result	Execution time	Memory
347335		Mefarnis	Parrots (IOI11_parrots)	C++14	96 / 100	11 ms	1580 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"

int enc[4] = {1,6,30,120};

void encode(int n, int ar[]) {
	if(n <= 32) {
		for( int i = 0 ; i < n ; i++ )
			for( int j = 0 ; j < 8 ; j++ )
				if(ar[i] & (1<<j))
					send(8*i+j);
	}
	else {
		for( int i = 0 ; i < n ; i++ ) {
			int x = (i%2 == 0) ? ar[i] : 255-ar[i];
			for( int j = 3 ; j >= 0 ; j-- )
				while(x >= enc[j]) {
					x -= enc[j];
					send(4*i+j);
				}
		}
	}
}

decoder

#include "decoder.h"
#include "decoderlib.h"

int dec[4] = {1,6,30,120};

void decode(int n, int m, int x[]) {
	int ar[n];
	for( int i = 0 ; i < n ; i++ )
		ar[i] = 0;
	if(n <= 32) {
		for( int i = 0 ; i < m ; i++ ) {
			int id = x[i] / 8;
			int b = x[i] % 8;
			ar[id] |= (1<<b);
		}
	}
	else {
		for( int i = 0 ; i < m ; i++ ) {
			int id = x[i] / 4;
			int b = x[i] % 4;
			ar[id] += dec[b];
		}
		for( int i = 0 ; i < n ; i++ )
			ar[i] = (i%2 == 0) ? ar[i] : 255-ar[i];
	}
	for( int i = 0 ; i < n ; i++ )
		output(ar[i]);
}

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 15 / 19