Submission #1296272

#	Time	Username	Problem	Language	Result	Execution time	Memory
1296272		__ugur__	Tracks in the Snow (BOI13_tracks)	C++17	0 / 100	2133 ms	917392 KiB

tracks

#include <bits/stdc++.h>

using namespace std;
using i64 = int64_t;
using u64 = uint64_t;
using u32 = uint32_t;


int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	
	int h,w;
	cin >> h >> w;
	vector<string> meadow(h);
	for(auto& str : meadow)
		cin >> str;

	queue<pair<int, int>> qu;
	
	int ans = 0;

	const int xoff[4] = {-1, 0, 0, 1};
	const int yoff[4] = {0, -1, 1, 0};
	for(int y=0; y<h; y++) {
		for(int x=0; x<w; x++) {
			if(meadow[y][x] == '.')
				continue;
			bool found_fox = false;
			bool found_rabbit = false;
			qu.push({y, x});
			while(qu.size()) {
				auto [ny, nx] = qu.front();
				qu.pop();
				found_fox |= meadow[ny][nx] == 'F';
				found_rabbit |= meadow[ny][nx] == 'R';
				meadow[ny][nx] = '.';
				for(int cy,cx,k=0; k<4; k++) {
					cy = ny + yoff[k];
					cx = nx + xoff[k];
					if(cy >= 0 && cx >= 0 &&
							cy < h && cx < w &&
							meadow[cy][cx] != '.')
						qu.push({cy, cx});
				}
			}
			ans += found_fox + found_rabbit;
		}
	}

	cout << ans << '\n';

	return 0;
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 70