create dev channel

zeta/py/completed/26091.py

@@ -0,0 +1,15 @@
+if __name__ == "__main__":
+    N, M = map(int, input().split())
+    A = list(map(int, input().split()))
+    A.sort()
+    start = 0
+    end = N - 1
+    cnt = 0
+    while start < end:
+        if A[start] + A[end] >= M:
+            cnt += 1
+            end -= 1
+            start += 1
+        else:
+            start += 1
+    print(cnt)