알고리즘 공부

백준 양

컴퓨터과학 2023. 7. 21. 00:31

https://www.acmicpc.net/problem/3184

 

3184번: 양

첫 줄에는 두 정수 R과 C가 주어지며(3 ≤ R, C ≤ 250), 각 수는 마당의 행과 열의 수를 의미한다. 다음 R개의 줄은 C개의 글자를 가진다. 이들은 마당의 구조(울타리, 양, 늑대의 위치)를 의미한다.

www.acmicpc.net

흠 dfs 문제로 풀려고 해도 전부 bfs로 풀리네요 흐음 

#include <iostream>
#include <vector>
#include <queue>
#include<string>
#include<algorithm>
#include<cmath>
#include<unordered_map>
#include<map>
using namespace std;

struct Point {
	int i, j, t, cnt;
	char c;
};

void Prints(vector<vector<int>>maps, int n, int m) {
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cout << maps[i][j];
		}
		cout << endl;
	}
	cout << endl;
}

void Prints(vector<vector<bool>>maps, int n, int m) {
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cout << maps[i][j];
		}
		cout << endl;
	}
	cout << endl;
}
void Prints(vector<vector<char>>maps, int n, int m) {
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cout << maps[i][j];
		}
		cout << endl;
	}
	cout << endl;
}
void Prints(vector<vector<vector<char>>>maps, int n, int m, int k) {
	for (int t = 0; t < k; t++) {
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < m; j++) {
				cout << maps[t][i][j];
			}
			cout << endl;
		}
		cout << endl;
	}
	cout << endl;
}

void Prints(vector<vector<vector<bool>>>maps, int n, int m, int k) {
	for (int t = 0; t < k; t++) {
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < m; j++) {
				cout << maps[t][i][j];
			}
			cout << endl;
		}
		cout << endl;
	}
	cout << endl;
}


struct Data {
	int score;
	int index;
};

struct Word {
	std::string word;
	int count;
};
bool compare(const Data &a, const Data &b) {
	return a.score > b.score;
}
int main() {
	int n, m;
	cin >> n >> m;
	vector<vector<char>>maps;
	vector<bool>tmpbVisited(m,false);
	vector<vector<bool>>bVisited(n, tmpbVisited);
	vector<vector<bool>>initbVisited(n, tmpbVisited);
	for (int i = 0; i < n; i++) {
		string str;
		cin >> str;
		vector<char>tmpMaps;
		for (int j = 0; j < str.size(); j++) {
			if (str[j] == '#') {
				initbVisited[i][j] = true;

			}
			tmpMaps.push_back(str[j]);
		}
		maps.push_back(tmpMaps);
	}
	int diri[] = { 1,-1,0,0 };
	int dirj[] = { 0,0,1,-1 };
	bVisited = initbVisited;
	int gsheep = 0;
	int gwolf = 0;
	for (int z = 0; z < n; z++) {
		for (int t = 0; t < m; t++) {
			int sheep = 0;
			int wolf = 0;
			if (bVisited[z][t] == false ) {
				queue<Point>q;
				Point p;
				p.i = z;
				p.j = t;
				bVisited[z][t] = true;
				if (maps[z][t] == 'o') {
					//cout << z<<","<<t<<endl;
					sheep++;
				}
				if (maps[z][t] == 'v') {
					//cout << z << "," << t << endl;
					wolf++;

				}
				q.push(p);
				while (!q.empty()) {
					Point start = q.front();
					q.pop();
					for (int i = 0; i < 4; i++) {
						int tmpDiri = start.i + diri[i];
						int tmpDirj = start.j + dirj[i];
						if (tmpDiri == -1 || tmpDirj == -1 || tmpDiri >= n || tmpDirj >= m||bVisited[tmpDiri][tmpDirj]==true) {
							continue;
						}
						bVisited[tmpDiri][tmpDirj] = true;
						Point tmpP;
						tmpP.i = tmpDiri;
						tmpP.j = tmpDirj;
						q.push(tmpP);
						if (maps[tmpDiri][tmpDirj] == 'o') {
						//	cout << tmpDiri << "," << tmpDirj << endl;
							sheep++;
						}
						if (maps[tmpDiri][tmpDirj] == 'v') {
							//cout << tmpDiri << "," << tmpDirj << endl;
							wolf++;
						}
						//Prints(bVisited, n, m);
					}
				}
			}
			if (sheep > 0 || wolf > 0) {
				if (sheep > wolf) {
					//cout << "sheep win:"<<sheep << endl;
					gsheep += sheep;
				}
				else if (sheep <= wolf) {
					//cout <<"wolf win:"<<  wolf << endl;
					gwolf += wolf;
			   }
				
			}
			
		}
	}
	cout << gsheep << " " << gwolf;

	return 0;
}