代码
class MinStack {
public:
/** initialize your data structure here. */
stack<int> Stack, StackMin;
MinStack() = default;
void push(int x) {
Stack.push(x);
if (StackMin.empty() || StackMin.top() >= x) {
StackMin.push(x);
} else if (StackMin.top() < x) {
StackMin.push(StackMin.top());
}
}
void pop() {
StackMin.pop();
Stack.pop();
}
int top() {
return Stack.top();
}
int getMin() {
return StackMin.top();
}
};
/**
* 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();
*/
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