Submission #420943

#	Time	Username	Problem	Language	Result	Execution time	Memory
420943		faresbasbs	Parrots (IOI11_parrots)	C++14	98 / 100	10 ms	1324 KiB

encoder

#include <bits/stdc++.h>
#include "encoder.h"
#include "encoderlib.h"
using namespace std;

void encode(int n , int m[]){
	int cnt = 0;
	for(int i = 0 ; i < n ; i += 1){
		for(int j = 0 ; j < 8 ; j += 1){
			if(j < 4){
				if(m[i] & (1<<j)){
					cnt += 1;
				}
			}else{
				if(m[i] & (1<<j)){
					cnt += 2;
				}
			}
		}
	}
	if(cnt <= 6*n){
		for(int i = 0 ; i < n ; i += 1){
			int val = i*4;
			for(int j = 0 ; j < 8 ; j += 1){
				if(j < 4){
					if(m[i]&(1<<j)){
						send(val+j);
					}
				}else{
					if(m[i]&(1<<j)){
						send(val+j-4),send(val+j-4);
					}
				}
			}
		}
	}else{
		send(0),send(0),send(0),send(0);
		for(int i = 0 ; i < n ; i += 1){
			int val = i*4;
			for(int j = 0 ; j < 8 ; j += 1){
				if(j < 4){
					if(m[i]&(1<<j)){

					}else{
						send(val+j);
					}
				}else{
					if(m[i]&(1<<j)){
						
					}else{
						send(val+j-4),send(val+j-4);
					}
				}
			}
		}
	}
}

decoder

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

void decode(int n , int l , int X[]){
	map<int,int> mp;
	int ans[n];
  	for(int i = 0 ; i < l ; i += 1){
  		mp[X[i]] += 1;
  	}
  	for(int i = 0 ; i < n ; i += 1){
  		ans[i] = 0;
  	}
  	if(mp[0] >= 4){
  		mp[0] -= 4;
  		for(int i = 0 ; i < n ; i += 1){
  			ans[i] = (1<<8)-1;
  		}
  	}
  	for(auto i : mp){
  		int val = i.first%4 , val2 = i.first/4;
  		if(i.second == 1){
  			ans[val2] ^= (1<<val);
  		}else if(i.second == 2){
  			ans[val2] ^= (1<<(val+4));
  		}else if(i.second == 3){
  			ans[val2] ^= (1<<val);
  			ans[val2] ^= (1<<(val+4));
  		}
  	}
  	for(int i = 0 ; i < n ; i += 1){
  		output(ans[i]);
  	}
}

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