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LeetCode-Solutions/C++/validate-stack-sequences.cpp at master · pythonpeixun/LeetCode-Solutions · GitHub
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validate-stack-sequences.cpp
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C++
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validate-stack-sequences.cpp
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//
Time: O(n)
//
Space: O(n)
class
Solution
{
public:
bool
validateStackSequences
(vector<
int
>& pushed, vector<
int
>& popped) {
int
i =
0
;
vector<
int
> s;
for
(
const
auto
& v : pushed) {
s.
emplace_back
(v);
while
(!s.
empty
() &&
i < popped.
size
() &&
s.
back
() == popped[i]) {
s.
pop_back
();
++i;
}
}
return
i == popped.
size
();
}
};
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