Merge pull request #90 from kajchang/master

Solve Cash Register Problem

intermediate/Multiple_Cash_Registers_kajchang.py

@@ -0,0 +1,30 @@
+def checkout_time(customer_times, registers):
+    time_elapsed = 0
+
+    # each register takes the first customer in line
+    registers = [customer_times.pop(0) for x in range(registers)]
+
+    # while there is a line and all registers are not done
+    while any(register > 0 for register in registers):
+        # increment time
+        time_elapsed += 1
+
+        # for each register
+        for x in range(0, len(registers)):
+            # decrease customer times
+            registers[x] -= 1
+
+            # take the next customer in line
+            if registers[x] == 0:
+                if customer_times:
+                    registers[x] = customer_times.pop(0)
+
+                else:
+                    registers[x] = 0
+
+    return time_elapsed
+
+
+if __name__ == "__main__":
+    print(checkout_time([5, 1, 3], 1))
+    print(checkout_time([10, 3, 4, 2], 2))