Submission #435610

#	Time	Username	Problem	Language	Result	Execution time	Memory
435610		2qbingxuan	Navigation 2 (JOI21_navigation2)	C++17	7 / 100	1516 ms	1036 KiB

Anna

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

using namespace std;

namespace {
    pair<int,int> moves[4] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0}};
} // namespace

void Anna(int N, int K, std::vector<int> R, std::vector<int> C) {
    auto ok = [N](int x, int y){ return x >= 0 && x < N && y >= 0 && y < N; };
    vector<vector<int>> nxt(N, vector<int>(N));
    for (int i = 0, prod = 1; i < K; i++) {
        queue<pair<int,int>> q;
        vector< vector<bool> > vis(N, vector<bool>(N));
        nxt[R[i]][C[i]] += 4 * prod;
        vis[R[i]][C[i]] = true;
        q.emplace(R[i], C[i]);
        while (!q.empty()) {
            auto [x, y] = q.front(); q.pop();
            for (int k = 0; k < 4; k++) {
                auto [dx, dy] = moves[k];
                if (ok(x+dx, y+dy) && !vis[x+dx][y+dy]) {
                    nxt[x+dx][y+dy] += k * prod;
                    vis[x+dx][y+dy] = true, q.emplace(x+dx, y+dy);
                }
            }
        }
        prod *= 5;
    }

    vector<vector<int>> flag(N, vector<int>(N));
    for (int i = 1; i+1 < N; i++) {
        for (int j = 1; j+1 < N; j++) {
            flag[i+1][j+1] = 
                flag[i-1][j-1] ^ flag[i-1][j] ^ flag[i-1][j+1] ^
                flag[i][j-1] ^ flag[i][j] ^ flag[i][j+1] ^
                flag[i+1][j-1] ^ flag[i+1][j] ^ nxt[i][j];

        }
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            SetFlag(i, j, flag[i][j] + 1);
        }
    }
}

Bruno

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

using namespace std;

namespace {

// int variable_example = 1;

} // namespace

std::vector<int> Bruno(int K, std::vector<int> value) {
    int xs = 0;
    for (int x: value) xs ^= x - 1;
    std::vector<int> res(K);
    for (int i = 0; i < K; i++) {
        res[i] = xs % 5;
        xs /= 5;
    }
    return res;
}

• Subtask 1: 7 / 100