2024-08-20 월드컵

InSange/README.md

@@ -29,6 +29,7 @@
 | 25차시 | 2024.08.10 |  BFS  | [Minimum Height Trees](https://leetcode.com/problems/minimum-height-trees/)  | [#25](https://github.com/AlgoLeadMe/AlgoLeadMe-8/pull/87)]
 | 26차시 | 2024.08.11 |  수학  | [Magic Squares In Grid](https://leetcode.com/problems/magic-squares-in-grid/)  | [#26](https://github.com/AlgoLeadMe/AlgoLeadMe-8/pull/89)]
 | 27차시 | 2024.08.17 |  문자열  | [Number of Senior Citizens](https://leetcode.com/problems/number-of-senior-citizens/)  | [#27](https://github.com/AlgoLeadMe/AlgoLeadMe-8/pull/91)]
+| 28차시 | 2024.08.21 |  백트래킹 | [월드컵](https://www.acmicpc.net/problem/6987)  | [#28](https://github.com/AlgoLeadMe/AlgoLeadMe-8/pull/94)]
 ---
 
 https://leetcode.com/problems/robot-collisions/

InSange/백트래킹/6987.cpp

@@ -0,0 +1,91 @@
+#include <iostream>
+#include <vector>
+
+using namespace std;
+
+vector<vector<int>> record;
+int t;
+bool draw_flag, flag;
+vector<pair<int, int>> game = { {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5},
+													 {1, 2}, {1, 3}, {1, 4}, {1, 5},
+													 {2, 3}, {2, 4}, {2, 5},
+													 {3, 4}, {3, 5},
+													 {4, 5} };
+
+bool CheckPlay(int round)
+{
+	if (round == 15)
+	{
+		for (int i = 0; i < 6; i++)
+		{
+			for (int j = 0; j < 3; j++)
+			{
+				if (record[i][j]) return false;
+			}
+		}
+		return true;
+	}
+
+	int firstTeam, secondTeam;
+	firstTeam = game[round].first;
+	secondTeam = game[round].second;
+
+	if (record[firstTeam][0] && record[secondTeam][2])	// first team win, second team lose
+	{
+		--record[firstTeam][0];
+		--record[secondTeam][2];
+		if (CheckPlay(round + 1)) return true;
+		++record[firstTeam][0];
+		++record[secondTeam][2];
+	}
+
+	if (record[firstTeam][1] && record[secondTeam][1])	// first team draw, second team draw
+	{
+		--record[firstTeam][1];
+		--record[secondTeam][1];
+		if (CheckPlay(round + 1)) return true;
+		++record[firstTeam][1];
+		++record[secondTeam][1];
+	}
+
+	if (record[firstTeam][2] && record[secondTeam][0])	// first team lose, second team win
+	{
+		--record[firstTeam][2];
+		--record[secondTeam][0];
+		if (CheckPlay(round + 1)) return true;
+		++record[firstTeam][2];
+		++record[secondTeam][0];
+	}
+
+	return false;
+}
+
+void Solve()
+{
+	record.assign(6, vector<int>(3, 0));
+	t = 4;
+
+	while (t--)
+	{
+		for (int i = 0; i < 6; i++)
+		{
+			for (int j = 0; j < 3; j++)
+			{
+				cin >> record[i][j];
+			}
+		}
+
+		if (CheckPlay(0)) cout << 1 << " ";
+		else cout << 0 << " ";
+	}
+}
+
+int main()
+{
+	ios::sync_with_stdio(false);
+	cin.tie(nullptr);
+
+	Solve();
+
+	return 0;
+}