Submission #1071248

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071248		Plurm	Ancient Machine (JOI21_ancient_machine)	C++17	5 / 100	2096 ms	10980 KiB

Anna

#include "Anna.h"
#include <vector>

namespace {

int variable_example = 0;

}

void Anna(int N, std::vector<char> S) {
    for (int i = 0; i < N; i++) {
        if (S[i] == 'X') {
            Send(0);
        } else if (S[i] == 'Y') {
            Send(1);
            Send(0);
        } else {
            Send(1);
            Send(1);
        }
    }
}

Bruno

#include "Bruno.h"
#include <bits/stdc++.h>
using namespace std;
namespace {
int FT[100005];
void add(int idx, int amt) {
    idx++;
    while (idx < 100005) {
        FT[idx] += amt;
        idx += idx & -idx;
    }
}
int sum(int idx) {
    idx++;
    int ret = 0;
    while (idx > 0) {
        ret += FT[idx];
        idx -= idx & -idx;
    }
    return ret;
}
} // namespace

void Bruno(int N, int L, std::vector<int> A) {
    memset(FT, 0, sizeof(FT));
    string target;
    int ptr = 0;
    while (ptr < L) {
        if (A[ptr++] == 0)
            target.push_back('X');
        else if (A[ptr++] == 0)
            target.push_back('Y');
        else
            target.push_back('Z');
    }
    bool done = false;
    priority_queue<pair<int, int>> pq;
    vector<int> prefX(N, -1);
    for (int i = 0; i < N; i++) {
        add(i, 1);
        if (target[i] == 'X')
            prefX[i] = i;
        else
            prefX[i] = i ? prefX[i - 1] : -1;
    }
    vector<int> suffZ(N, N);
    for (int i = N - 1; i >= 0; i--) {
        if (target[i] == 'Z')
            suffZ[i] = i;
        else
            suffZ[i] = i == N - 1 ? N : suffZ[i + 1];
    }
    for (int i = 0; i < N; i++) {
        if (target[i] == 'Y' && prefX[i] != -1 && suffZ[i] != N) {
            int c = suffZ[i] - prefX[i] - 2;
            pq.push({-c, i});
        }
    }
    vector<int> ord;
    int chosen = -1;
    while (!pq.empty()) {
        auto ok = pq.top();
        pq.pop();
        if (sum(suffZ[ok.second] - 1) - sum(prefX[ok.second]) - 1 !=
            -ok.first) {
            pq.push({-(sum(suffZ[ok.second] - 1) - sum(prefX[ok.second]) - 1),
                     ok.second});
            continue;
        }
        if (target[ok.second] == '\0')
            continue;
        for (int j = prefX[ok.second] + 1; j < suffZ[ok.second]; j++) {
            if (j == ok.second)
                continue;
            if (target[j] != '\0') {
                target[j] = '\0';
                add(j, -1);
                ord.push_back(j);
            }
            prefX[j] = prefX[ok.second];
            suffZ[j] = suffZ[ok.second];
        }
        target[ok.second] = '\0';
        add(ok.second, -1);
        ord.push_back(ok.second);
    }
    for (int i = 0; i < N; i++) {
        if (target[i] != '\0')
            ord.push_back(i);
    }
    for (int x : ord)
        Remove(x);
}

Compilation message (stderr)

Anna.cpp:6:5: warning: '{anonymous}::variable_example' defined but not used [-Wunused-variable]
    6 | int variable_example = 0;
      |     ^~~~~~~~~~~~~~~~

Bruno.cpp: In function 'void Bruno(int, int, std::vector<int>)':
Bruno.cpp:36:10: warning: unused variable 'done' [-Wunused-variable]
   36 |     bool done = false;
      |          ^~~~
Bruno.cpp:60:9: warning: unused variable 'chosen' [-Wunused-variable]
   60 |     int chosen = -1;
      |         ^~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95