Submission #430087

#	Time	Username	Problem	Language	Result	Execution time	Memory
430087		KoD	Ancient Machine (JOI21_ancient_machine)	C++17	100 / 100	86 ms	8156 KiB

Anna

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

namespace {

using ll = long long;
template <class T> using Vec = std::vector<T>;

constexpr std::array<ll, 63> FIB = [] {
    std::array<ll, 63> ret{};
    ret[0] = 1;
    ret[1] = 2;
    for (int i = 2; i < 63; ++i) {
        ret[i] = ret[i - 1] + ret[i - 2];
    }
    return ret;
}();

ll encode(const std::array<int, 63>& arr) {
    ll x = 0;
    for (int i = 0; i < 63; ++i) {
        if (arr[i]) {
            x += FIB[62 - i];
        }
    }
    return x;
}

}

void Anna(int N, Vec<char> S) {
    int idx = 0;
    while (idx < N and S[idx] != 'X') {
        idx += 1;
    }
    for (int i = 0; i < 17; ++i) {
        Send(idx >> i & 1);
    }
    Vec<int> seq(N);
    for (int i = idx + 1; i < N; ++i) {
        if (S[i] == 'Z' and (i + 1 == N or S[i + 1] != 'Z')) {
            seq[i] = 1;
        }
    }
    for (int l = 0; l < N; l += 63) {
        std::array<int, 63> arr;
        for (int i = 0; i < 63; ++i) {
            arr[i] = (l + i >= N ? 0 : seq[l + i]);
        }
        const ll x = encode(arr);
        for (int i = 0; i < 44; ++i) {
            Send(x >> i & 1);
        }
    }
}

Bruno

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

namespace {

using ll = long long;
template <class T> using Vec = std::vector<T>;

constexpr std::array<ll, 63> FIB = [] {
    std::array<ll, 63> ret{};
    ret[0] = 1;
    ret[1] = 2;
    for (int i = 2; i < 63; ++i) {
        ret[i] = ret[i - 1] + ret[i - 2];
    }
    return ret;
}();

std::array<int, 63> decode(ll x) {
    std::array<int, 63> ret{};
    int idx = 0;
    while (idx < 63) {
        if (x >= FIB[62 - idx]) {
            x -= FIB[62 - idx];
            ret[idx] = 1;
            idx += 2;
        } else {
            idx += 1;
        }
    }
    return ret;
}

}  // namespace

void Bruno(int N, int L, Vec<int> A) {
    int Xpos = 0;
    for (int i = 0; i < 17; ++i) {
        Xpos |= A[i] << i;
    }
    int idx = 0;
    Vec<int> vec;
    for (int i = 17; i < L; i += 44) {
        ll x = 0;
        for (int k = 0; k < 44; ++k) {
            x |= (ll) A[i + k] << k;
        }
        for (const auto y : decode(x)) {
            if (y) {
                vec.push_back(idx);
            }
            idx += 1;
        }
    }
    Vec<int> removed(N);
    for (const auto i : vec) {
        for (int j = i - 1; j > Xpos; --j) {
            Remove(j);
            removed[j] = true;
        }
        Remove(i);
        removed[i] = true;
        Xpos = i;
    }
    for (int i = 0; i < N; ++i) {
        if (!removed[i]) {
            Remove(i);
        }
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95