Submission #556444

#	Time	Username	Problem	Language	Result	Execution time	Memory
556444		blue	Broken Device (JOI17_broken_device)	C++17	100 / 100	41 ms	2412 KiB

Anna

#include "Annalib.h"
#include <vector>
#include <iostream>
#include <string>
using namespace std;

namespace
{
	using vi = vector<int>;
	using ll = long long;
	#define sz(x) int(x.size())

	vector<string> key{"", "0", "1", "00", "10", "11", "0", "01"};
}

void Anna(int N, ll X, int K, int P[])
{
	string bs(200, '0');
	for(int b = 0; b < 200; b++)
	{
		bs[b] = (X%2) + '0';
		X >>= 1;
	}


	vi br(N, 0); //broken

	for(int i = 0; i < K; i++)
		br[P[i]] = 1;

	int cb = 0;

	// cerr << "N = " << N << '\n';

	for(int i = 0; i < N; i += 3)
	{
		// cerr << "i = " << i << "\n";
		int cbr = br[i] + 2*br[i+1] + 4*br[i+2];
		
		for(int b2 : {3, 4, 5, 7, 1, 2, 6, 0})
		{
			bool valid = 1;

			// cerr << "cbr = " << cbr << ", cb = " << cb << '\n';
			// cerr << bs[cb] << ' ' << bs[cb+1] << '\n';


			for(int f = 0; f < sz(key[b2]); f++)
				if(key[b2][f] != bs[cb+f])
					valid = 0;

			if(!valid) continue;

			// cerr << "going for " << b2 << '\n';

			if((b2 & cbr) == 0)
			{
				cb += sz(key[b2]);
				for(int j = 0; j < 3; j++)
				{
					// cerr << "set : " << i+j << '\n';
					Set(i + j, (b2 >> j) & 1);
				}
				break;
			}
		}
	}
	// cerr << "terminated\n";
}

Bruno

#include "Brunolib.h"
#include <vector>
#include <string>
using namespace std;

namespace
{
	using vi = vector<int>;
	using ll = long long;
	#define sz(x) int(x.size())

	vector<string> key{"", "0", "1", "00", "10", "11", "0", "01"};

}


ll Bruno(int N, int A[])
{
	string res_s;

	for(int i = 0; i < N; i += 3)
	{
		int z = A[i] + 2*A[i+1] + 4*A[i+2];
		res_s += key[z];
	}

	ll bs = 1;
	ll res = 0;

	for(int i = 0; i < 60; i++)
	{
		if(res_s[i] == '1')
			res += bs;
		bs *= 2;
	}

	return res;
}

• Subtask 1: 100 / 100