restructure zeta/** to storage/zeta/**

storage/zeta/py/completed/11000.py

@@ -0,0 +1,23 @@
+import sys
+import heapq
+
+input = sys.stdin.readline
+
+
+def solve(N, Cl):
+    Cl.sort()
+
+    pq = []
+    heapq.heappush(pq, Cl[0][1])
+    for i in range(1, N):
+        if pq[0] <= Cl[i][0]:
+            heapq.heappop(pq)
+        heapq.heappush(pq, Cl[i][1])
+
+    return len(pq)
+
+
+if __name__ == "__main__":
+    N = int(input())
+    Cl = [tuple(map(int, input().split())) for _ in range(N)]
+    print(solve(N, Cl))