Submission #1101257

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101257		huantran	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	504 KiB

patkice

#include <iostream>
#include <algorithm>
#include <cstring>
#include <string.h>
#include <vector>
#include <math.h>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <numeric>
#include <random>
#include <chrono>
#include <fstream>
#include <stack>
#include <cmath>
#define bit(x, i) (((x) >> (i)) & 1LL)
#define rand rd
#define PI acos(-1)

using namespace std;
typedef long long int ll;
const int maxn = 1e2 + 5;
const ll mod = 998244353;
const int inf = 1e9;
const ll base = 1e5 + 7;
using pll = pair<ll, ll>;

const string NAME = "LOCO";
const int NTEST = 100;

mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());

ll Rand(ll l, ll r) {
    return l + rd() % (r - l + 1);
}

int n, m, s, t, x, y;
char adj[maxn][maxn];
map<char, pair<int, int>> dir;
map<int, char> conv, conv_2;
int dis[maxn][maxn];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> adj[i][j];
            
            if (adj[i][j] == 'o')
                s = i, t = j;
            
            if (adj[i][j] == 'x')
                x = i, y = j;
        }
    }

    set<pair<int, int>> ans;
    conv[0] = 'N', conv[1] = 'E', conv[2] = 'W', conv[3] = 'S';
    conv_2['^'] = 0, conv_2['>'] = 1, conv_2['<'] = 2, conv_2['v'] = 3;
    dir['N'] = {-1, 0}, dir['E'] = {0, 1}, dir['W'] = {0, -1}, dir['S'] = {1, 0};

    for (int k = 0; k < 4; k++) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= m; j++) {
                dis[i][j] = inf;
            }
        }

        queue<pair<int, int>> q;
        int u = s + dir[conv[k]].first, v = t + dir[conv[k]].second;
        dis[s][t] = 0;
        if (u >= 1 && u <= n && t >= 1 && t <= m && adj[u][v] != '.')
            q.push({u, v}), dis[u][v] = 1;

        while (!q.empty()) {
            int u = q.front().first;
            int v = q.front().second;
            // if (k == 3)
            //     cout << "Go: " << u << ' ' << v << '\n';
            q.pop();

            int u_x = u + dir[conv[conv_2[adj[u][v]]]].first;
            int v_x = v + dir[conv[conv_2[adj[u][v]]]].second;

            if (u_x >= 1 && u_x <= n && v_x >= 1 && v_x <= m && adj[u_x][v_x] != '.' && dis[u_x][v_x] > dis[u][v] + 1)
                q.push({u_x, v_x}), dis[u_x][v_x] = dis[u][v] + 1;
        }

        if (dis[x][y] != inf)
            ans.insert({dis[x][y], k});
    }

    if (ans.size()) {
        cout << ":)" << '\n';
        int res = (*ans.begin()).first;
        set<char> c;
        for (auto j : ans) {
            if (j.first == res)
                c.insert(conv[(j.second)]);
        }

        cout << (*c.begin());
    }
    else 
        cout << ":(";
}

• Subtask 1: 30 / 30
• Subtask 2: 20 / 20