[조은비] Day17

leetcode2/1easy/조은비/860.py

@@ -0,0 +1,28 @@
+class Solution:
+    def lemonadeChange(self, bills: List[int]) -> bool:
+        # 현금 없이 레몬에이드 팔기
+        f_d = 0
+        t_d = 0
+
+        for bill in bills:
+            if bill == 5:
+                f_d += 1
+            elif bill == 10:
+                if f_d == 0:
+                    return False
+                f_d -= 1
+                t_d += 1
+            else:
+                if t_d > 0 and f_d > 0:
+                    t_d -= 1
+                    f_d -= 1
+                elif f_d >= 3:
+                    f_d -= 3
+                # 20$
+                else:
+                    return False
+        return True
+
+            # print(f_d, t_d, bill)
+
+