Submission #21550

#	Time	Username	Problem	Language	Result	Execution time	Memory
21550		Ushio	Broken Device (JOI17_broken_device)	C++14	63 / 100	72 ms	4644 KiB

Anna

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

const int FCT = 2;

void Anna( int N, long long X, int K, int P[] ){
    vector<int> per(N + FCT);
    srand(141417941L);
    for (int i = 0; i < N + FCT; ++i) {
        per[i] = i;
    }
    for (int i = 0; i < N; ++i) {
        int pos = i + rand() % (N - i);
        swap(per[i], per[pos]);
    }
    int bit = 0;
    int validity = 0;
    vector<bool> bad(N + FCT, false);
    for (int i = 0; i < FCT; ++i) {
        bad[per[N + i]] = true;
    }
    for (int i = 0; i < K; ++i) {
        bad[P[i]] = true;
    }
    for (int i = 0; i < N; ++i) {
        if (validity == 0) {
            bool ok = false;
            for (int j = 0; j <= FCT; ++j) {
                ok |= bad[per[i + j]];
            }
            if (ok) {
                Set(per[i], 0);
                validity = 0;
            } else {
                Set(per[i], 1);
                validity = FCT;
            }
        } else {
            if (bit <= 59) {
                if (X & (1LL << bit)) {
                    Set(per[i], 1);
                } else {
                    Set(per[i], 0);
                }
                bit++;
            } else {
                Set(per[i], 0);
            }
            validity--;
        }
    }
    cerr << "In: " << X << endl;
}

Bruno

#include "Brunolib.h"
#include <algorithm>
#include <iostream>
#include <cstdlib>
#include <vector>
using namespace std;

const int FCT = 2;

long long Bruno( int N, int A[] ){
    vector<int> per(N + 1);
    srand(141417941L);
    for (int i = 0; i < N + 1; ++i) {
        per[i] = i;
    }
    for (int i = 0; i < N; ++i) {
        int pos = i + rand() % (N - i);
        swap(per[i], per[pos]);
    }
    int validity = 0;
    int bit = 0;
    int64_t ans = 0;
    for (int i = 0; i < N; ++i) {
        if (validity == 0) {
            validity = A[per[i]] * FCT;
        } else {
            if (bit <= 59) {
                ans |= ((int64_t) A[per[i]]) << bit;
                ++bit;
            }
            validity--;
        }
    }
    cerr << "Out: " << ans << endl;
    return ans;
}

• Subtask 1: 63 / 100