Submission #960925

#	Time	Username	Problem	Language	Result	Execution time	Memory
960925		emptypringlescan	Parrots (IOI11_parrots)	C++17	81 / 100	8 ms	1496 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
#include <bits/stdc++.h>
using namespace std;
void encode(int n, int m[]){
	for(int i=0; i<n; i++){
		vector<int> stuff;
		for(int j=6; j>=0; j-=2){
			stuff.push_back(((m[i]>>j)&0b11));
			send((i*2+(j<4?1:0))*4+((m[i]>>j)&0b11));
		}
		if(stuff[0]<stuff[1]){
			send(i*2*4);
			send(i*2*4);
			send(i*2*4);
		}
		else{
			send(i*2*4+1);
			send(i*2*4+1);
			send(i*2*4+1);
		}
		if(stuff[2]<stuff[3]){
			send((i*2+1)*4);
			send((i*2+1)*4);
			send((i*2+1)*4);
		}
		else{
			send((i*2+1)*4+1);
			send((i*2+1)*4+1);
			send((i*2+1)*4+1);
		}
	}
}

decoder

#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>
using namespace std;

void decode(int n, int l, int x[]){
	map<int,int> got,done;
	vector<int> ord;
	for(int i=0; i<l; i++){
		got[x[i]]++;
		if(done[x[i]]==0&&got[x[i]]==3){
			ord.push_back(x[i]);
			got[x[i]]-=3;
			done[x[i]]=1;
		}
	}
	vector<int> ok;
	for(auto i:got) if(i.second!=3) for(int j=0; j<i.second; j++) ok.push_back(i.first);
	int p=ok.size();
	//cout << p << ' ';
	assert(p%2==0);
	vector<int> yes[100];
	for(auto i:ok){
		yes[i>>2].push_back(i&0b11);
	}
	for(int i:ord){
		int y=i>>2;
		if(i&1) sort(yes[y].begin(),yes[y].end(),greater<int>());
		else sort(yes[y].begin(),yes[y].end());
	}
	vector<int> ans;
	for(int i=0; i<100; i++) for(int j:yes[i]) ans.push_back(j);
	for(int i=0; i<(int)ans.size(); i+=4){
		output(ans[i]<<6|ans[i+1]<<4|ans[i+2]<<2|ans[i+3]);
	}
}

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 0 / 19