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min stack problem #2677

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min stack problem #2677

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7 changes: 0 additions & 7 deletions Sample.java
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31 changes: 31 additions & 0 deletions min stack problem
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Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
class MinStack {
Stack<Integer>st;
Stack<Integer> minst;
int min;
public MinStack() {
this.st=new Stack<>();
this.minst=new Stack<>();
this.min=Integer.MAX_VALUE;
this.minst.push(min);
}

public void push(int val) {
min=Math.min(min,val);
st.push(val);
minst.push(min);
}

public void pop() {
st.pop();
minst.pop();
min=minst.peek();
}

public int top() {
return st.peek();
}

public int getMin() {
return min;
}
}