-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathSolution.java
More file actions
42 lines (35 loc) · 943 Bytes
/
Solution.java
File metadata and controls
42 lines (35 loc) · 943 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
public class MinStack {
Stack<Integer> normalStack;
Stack<Integer> minValueStack;
/** initialize your data structure here. */
public MinStack() {
normalStack = new Stack<Integer>();
minValueStack = new Stack<Integer>();
}
public void push(int x) {
normalStack.push(x);
if (minValueStack.empty() || x < minValueStack.peek()) {
minValueStack.push(x);
} else {
minValueStack.push(minValueStack.peek());
}
}
public void pop() {
normalStack.pop();
minValueStack.pop();
}
public int top() {
return normalStack.peek();
}
public int getMin() {
return minValueStack.peek();
}
}
/**
* Your MinStack object will be instantiated and called as such:
* MinStack obj = new MinStack();
* obj.push(x);
* obj.pop();
* int param_3 = obj.top();
* int param_4 = obj.getMin();
*/