create dev channel

zeta/py/completed/17262.py

@@ -0,0 +1,15 @@
+import sys
+from dataclasses import dataclass
+
+input = sys.stdin.readline
+
+@dataclass
+class interval:
+    start: int
+    end: int
+
+
+if __name__ == "__main__":
+    N = int(input())
+    org = [interval(*map(int, input().split())) for _ in range(N)]
+    print(max([max(org, key=lambda x: x.start).start - min(org, key=lambda x: x.end).end, 0]))