Submission #97561

#	Time	Username	Problem	Language	Result	Execution time	Memory
97561		shoemakerjo	Broken Device (JOI17_broken_device)	C++14	100 / 100	64 ms	3328 KiB

Anna

#include "Annalib.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;

bool marked[200];

void Anna( int N, ll X, int K, int P[] ){
	for (int i = 0; i < N; i++) marked[i] = false;

	for (int i = 0; i < K; i++) {
		marked[P[i]] = true;
	}

	int a, b, c;
	for (int i = 0; i < N; i += 3) {
		a = i; b = i+1; c = i+2;
		int ct = 0;
		if (marked[a]) ct++;
		if (marked[b]) ct++;
		if (marked[c]) ct++;
		if (ct >= 2) {
			Set(a, 0); Set(b, 0); Set(c, 0);
			continue;
		}
		if (ct == 0) {
			//set all to 1 for a 1 bit

			if (X % 4 == 0) {
				Set(a, 0); Set(b, 1); Set(c, 1);
			}
			if (X % 4 == 2) {
				Set(a, 0); Set(b, 1); Set(c, 0);
			}	
			if (X % 4 == 1) {
				Set(a, 1); Set(b, 0); Set(c, 1);
			}
			if (X % 4 == 3) {
				Set(a, 1); Set(b, 1); Set(c, 1);
			}
			X /= 4;

		}
		if (ct == 1) {
			if (X % 2 == 0) {
				if (marked[a]) {
					if (X % 4 == 0) {
						Set(a, 0); Set(b, 1); Set(c, 1);
					}
					else {
						Set(a, 0); Set(b, 1); Set(c, 0);
					}
					X/=4;
				}
				else {
					Set(a, 1); Set(b, 0); Set(c, 0);
					X /= 2;
				}
			}
			else {
				if (marked[c]) {
					Set(a, 1); Set(b, 1); Set(c, 0);
				}
				else {
					Set(a, 0); Set(b, 0); Set(c, 1);
				}
				X /= 2;
			}

		}
	}

}

Bruno

#include "Brunolib.h"
#include <bits/stdc++.h>

using namespace std;
#define ll long long

ll Bruno( int N, int A[] ){
	ll res = 0;
	for (int i = N-1; i > 0; i -= 3) {
		int a = i-2;
		int b = i-1;
		int c = i;

		if (A[a] == 0 && A[b] == 0 && A[c] == 0) continue;

		int cv = (A[c] == 1) + 2*(A[b] == 1) + 4*(A[a] == 1);

		// cout << "cv : " << cv << endl;

		if (cv == 1) {
			res = res * 2 + 1;
		}
		if (cv == 2) {
			res = res * 4 + 2;
		}
		if (cv == 3) {
			res = res * 4 + 0;
		}
		if (cv == 4) {
			res = res * 2 + 0;
		}
		if (cv == 5) {
			res = res * 4 + 1;
		}
		if (cv == 6) {
			res = res * 2 + 1;
		}
		if (cv == 7) {
			res = res * 4 + 3;
		}
	}
	// cout << "RES: "  <<  res << endl;
	return res;
}

• Subtask 1: 100 / 100