Submission #377622

#	Time	Username	Problem	Language	Result	Execution time	Memory
377622		dimashii	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	1516 KiB

patkice

#include <bits/stdc++.h>

#define ll long long

using namespace std;

const int mxN = 5e3 + 5, mod = 1e9 + 7;

char a[mxN][mxN], d[mxN][mxN];

bool used[mxN][mxN];

int r, s;

int main() {
	ios :: sync_with_stdio(false), cin.tie(nullptr);
	cin >> r >> s;
	for (int i = 1; i <= r; ++i) {
		for (int j = 1; j <= s; ++j) { 
			cin >> a[i][j]; 
			d[i][j] = '#';
		}
	}	
	queue <pair <int, int> > q;
	for (int i = 1; i <= r; ++i) {
		for (int j = 1; j <= s; ++j) {
			if (a[i][j] == 'o') {
				used[i][j] = 1;
				q.push({i, j});
				break;
			}
		}
	}
	while (!q.empty()) {
		int i = q.front().first;
		int j = q.front().second;
		q.pop();
		if (a[i][j] == 'x') {
			cout << ":)\n" << d[i][j];
			return 0;
		}
		if (a[i][j] == 'o') {
			if (j + 1 <= s) {
				used[i][j + 1] = 1;
				q.push({i, j + 1});
				d[i][j + 1] = 'E';
			}
			if (i - 1 > 0) {
				used[i - 1][j] = 1;
				q.push({i - 1, j});
				d[i - 1][j] = 'N';
			}
			if (i + 1 <= r) {
				used[i + 1][j] = 1;
				q.push({i + 1, j});
				d[i + 1][j] = 'S';
			}
			if (j - 1 > 0) {
				used[i][j - 1] = 1;
				q.push({i, j - 1});
				d[i][j - 1] = 'W';
			}
		}
		else if (a[i][j] != '.') {
			if (a[i][j] == 'v' && !used[i + 1][j]) {
				used[i + 1][j] = 1;
				q.push({i + 1, j});
				d[i + 1][j] = d[i][j]; 
			}
			if (a[i][j] == '^' && !used[i - 1][j]) {
				used[i - 1][j] = 1;
				q.push({i - 1, j});
				d[i - 1][j] = d[i][j];
			}
			if (a[i][j] == '>' && !used[i][j + 1]) {
				used[i][j + 1] = 1;
				q.push({i, j + 1});
				d[i][j + 1] = d[i][j];
			}
			if (a[i][j] == '<' && !used[i][j - 1]) {
				used[i][j - 1] = 1;
				q.push({i, j - 1});
				d[i][j - 1] = d[i][j]; 
			}
		}
	}
	cout << ":(";
	return 0;
}

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