diff options
Diffstat (limited to 'min_stack.cpp')
-rw-r--r-- | min_stack.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/min_stack.cpp b/min_stack.cpp new file mode 100644 index 0000000..745c537 --- /dev/null +++ b/min_stack.cpp @@ -0,0 +1,23 @@ +#include "leetcode.h" + +class MinStack { +public: + stack<int> st; + int min = INT_MAX; + void push(int val) { + if (min >= val) { + st.push(min); + min = val; + } + st.push(val); + } + void pop() { + if (min == st.top()) { + st.pop(); + min = st.top(); + } + st.pop(); + } + int top() { return st.top(); } + int getMin() { return min; } +}; |