79-tgyuuAn

tgyuuAn/README.md

@@ -85,4 +85,5 @@
 | 76차시 | 2024.09.06 |  DFS + 트리  | <a href="https://school.programmers.co.kr/learn/courses/30/lessons/150367">표현 가능한 이진트리</a> | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/246
 | 77차시 | 2024.09.27 |  구현  | <a href="https://school.programmers.co.kr/learn/courses/30/lessons/150366">표 병합</a> | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/247
 | 78차시 | 2024.10.06 |  그리디  | <a href="https://school.programmers.co.kr/learn/courses/30/lessons/68646">풍선 터뜨리기</a> | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/250
+| 79차시 | 2024.10.12 |  이분 매칭  | <a href="https://www.acmicpc.net/problem/9576">책 나눠주기</a> | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/251
 ---

tgyuuAn/이분 매칭/책 나눠주기.py

@@ -0,0 +1,38 @@
+import sys
+
+def input(): return sys.stdin.readline().rstrip()
+
+T = int(input())
+for _ in range(T):
+    N, M = map(int, input().split())
+
+    matches_n = [0 for _ in range(N+1)]
+    matches_m = [0 for _ in range(M+1)]
+    want = dict()
+
+    for idx in range(1,M+1):
+        a, b = map(int, input().split())
+        want[idx] = [idx for idx in range(a, b+1)]
+
+    def dfs(now, graph, visited):
+        visited[now] = True
+
+        for _next in graph[now]:
+            if matches_n[_next] == 0:
+                matches_n[_next] = now
+                matches_m[now] = _next
+                return True
+
+            elif visited[matches_n[_next]] == False and dfs(matches_n[_next], graph, visited):
+                matches_m[now] = _next
+                return True
+
+        return False
+
+    answer = 0
+    for i in range(1,M+1):
+        visited = [False for _ in range(M+1)]
+        if(dfs(i, want, visited)):
+            answer += 1
+
+    print(answer)