[BOJ] #10733. 제로 / 실버4 / 20분 / 성공

Author: Mingguriguri

.DS_Store

@@ -0,0 +1,10 @@
+K = int(input())
+stack = []
+for i in range(K):
+    num = int(input())
+    stack.append(num)
+    if num == 0:
+        stack.pop()
+        stack.pop()
+
+print(sum(stack))