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- class Solution {
- public:
- int minSwaps(string s) {
- int open;
- open = 0;
- int minn=0;
- for(auto c: s){
- if(c == '[') open++;
- if(c == ']') open--;
- minn = min(open, minn);
- }
- if(minn >= 0) return 0;
- minn = abs(minn);
- return (minn+1)/2;
- }
- };
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