48 lines
871 B
C++
48 lines
871 B
C++
#include <string>
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#include <stack>
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#include <iostream>
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class Solution {
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public:
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static std::string minRemoveToMakeValid(const std::string& s) {
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int n = s.length(), stackSize = 0;
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std::stack<int> rem;
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for (int i = 0; i < n; ++i) {
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switch (s[i]) {
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case '(':
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++stackSize;
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rem.push(i);
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break;
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case ')':
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if (stackSize <= 0) {
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rem.push(i);
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} else {
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--stackSize;
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rem.pop();
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}
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}
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}
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int remSize = rem.size();
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int* rems = new int[remSize];
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for (int* ptr = rems + remSize - 1; !rem.empty(); ptr = ptr > rems ? ptr - 1 : ptr) {
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*ptr = rem.top();
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rem.pop();
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}
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std::string ret;
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for (int p1 = 0, p2 = 0; p1 < n; ++p1) {
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if (p1 == rems[p2])
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++p2;
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else
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ret.push_back(s[p1]);
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}
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return ret;
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}
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};
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int main() {
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std::cout << Solution::minRemoveToMakeValid("a)b(c)d");
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return 0;
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}
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