Submission #318330

#	Time	Username	Problem	Language	Result	Execution time	Memory
318330		nkft	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	492 KiB

patkice

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define mp make_pair
#define pb push_back
#define pf push_front
#define fi first
#define se second
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define nbits(x) __builtin_popcount(x)
#define gcd(x, y) __gcd(x, y)
#define SYNC_OFF ios::sync_with_stdio(0); cin.tie(0);
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;  
const int MOD = 1e9 + 7; // 998244353;
const int N = 300100;
const int INF = 1e15; // 1e18;
const double PI = acos(-1);
const int dx[] = {-1,0,1,0,-1,1,1,-1};
const int dy[] = {0,1,0,-1,1,1,-1,-1};
int powmod(int a, int b, int m = MOD) {
    int res = 1;
    a %= m; assert(b >= 0);
    for (; b; b>>=1) {
        if (b & 1) res = res*a % m;
        a = a*a % m;
    }
    return res;
}

int n, m, steps;
char dir;
char a[101][101];
int vis[101][101];
vector<pair<int, char>> ans;

void dfs(int x, int y) {
    steps++;
    vis[x][y] = 1;
    if (a[x][y] == 'x') {
        ans.pb({steps, dir});
    } else if (a[x][y] == '^') {
        dfs(x - 1, y);
    } else if (a[x][y] == '>') {
        dfs(x, y + 1);
    } else if (a[x][y] == 'v') {
        dfs(x + 1, y);
    } else if (a[x][y] == '<') {
        dfs(x, y - 1);
    }
}

signed main() {
    SYNC_OFF;
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> (a[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            if (a[i][j] == 'o') {
                memset(vis, 0, sizeof vis);
                steps = 0, dir = 'N'; dfs(i - 1, j);
                
                memset(vis, 0, sizeof vis);
                steps = 0, dir = 'S'; dfs(i + 1, j);
                
                memset(vis, 0, sizeof vis);
                steps = 0, dir = 'W'; dfs(i, j - 1);
                
                memset(vis, 0, sizeof vis);
                steps = 0, dir = 'E'; dfs(i, j + 1);
            }
        }
    }
    sort(all(ans));
    if (ans.size() == 0) {
        cout << ":(\n";
    } else {
        cout << ":)\n" << ans[0].second << "\n";
    }
    return 0;
}

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