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Create 678. Valid Parenthesis String #450

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Merged
merged 1 commit into from
Apr 7, 2024
Merged

Create 678. Valid Parenthesis String #450

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19 changes: 19 additions & 0 deletions 678. Valid Parenthesis String
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Original file line number Diff line number Diff line change
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#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

class Solution {
public:
bool checkValidString(string s) {
int low = 0, high = 0;
for (char c : s) {
low += (c == '(') ? 1 : -1;
high += (c != ')') ? 1 : -1;
if (high < 0) return false;
low = max(low, 0);
}
return low == 0;
}
};