Create collections.Counter()

Author: MONICARAVI

collections.Counter()

@@ -0,0 +1,12 @@
+from collections import Counter
+n = int(input())
+shoe_size = list(map(int,input().split()))
+shoe_count = Counter(shoe_size)
+customers = int(input())
+totalcost = 0
+for _ in range(customers):
+    size,amount = map(int,input().split())
+    if size in shoe_count.keys() and shoe_count[size]!=0:
+        totalcost+=amount
+        shoe_count[size] -=1 
+print(totalcost)