diff --git a/155-240605/main.py b/155-240605/main.py
new file mode 100644
index 0000000..140f9a6
--- /dev/null
+++ b/155-240605/main.py
@@ -0,0 +1,43 @@
+class MinStack:
+    def __init__(self):
+        self.sta = []
+        self.minn = 2 ** 31
+        self.tops = -1
+        self.sorted = []
+    
+    def push(self, val: int) -> None:
+        self.tops += 1
+        if len(self.sta) <= self.tops:
+            self.sta.append(val)
+        else:
+            self.sta[self.tops] = val
+        flag = False
+        for ind, num in enumerate(self.sorted):
+            if val < num:
+                self.sorted.insert(ind,val)
+                flag = True
+                break
+        if flag == False:
+            self.sorted.append(val)
+        self.minn = min(self.minn, val)
+
+    def pop(self) -> None:
+        val = self.sta[self.tops]
+        self.sorted.remove(val)
+        self.tops -= 1
+
+    def top(self) -> int:
+        return self.sta[self.tops]
+
+    def getMin(self) -> int:
+        return self.sorted[0]
+
+    
+mins = MinStack()
+mins.push(-2)
+mins.push(0)
+mins.push(-3)
+print(mins.getMin())
+print(mins.pop())
+print(mins.top())
+print(mins.getMin())
\ No newline at end of file