Test

Documents/Skaitļučupa(Cupa)_Python.py

@@ -0,0 +1,26 @@
+from collections import defaultdict
+
+# I
+N, M = map(int, input().split())
+cup = defaultdict(int)
+
+for _ in range(N):
+    x, s = map(int, input().split())
+    cup[x] += s
+
+# summa dalās ar M
+pairs = 0
+
+for x in cup:
+    if x >= M - x and cup[x] > 0:
+        if x == M - x:
+            pairs += cup[x] // 2
+            cup[x] %= 2
+        else:
+            if M - x in cup:
+                pairs += min(cup[x], cup[M - x])
+                cup[x] -= min(cup[x], cup[M - x])
+                cup[M - x] -= min(cup[x], cup[M - x])
+
+
+print(pairs)