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//

// Solution1209.cpp

// Algorithm

//

// Created by focus on 10/14/26.

// Copyright © 2026 Pancf. All rights reserved.

//

#include "Solution1209.hpp"

#include <vector>

std::string Solution1209::removeDuplicates(std::string s, int k)

{

std::vector<std::pair<char, int>> p;

for (auto c : s) {

if (!p.empty()) {

auto [cur, freq] = p.back();

if (cur == c) {

if (freq + 1 == k) {

p.pop_back();

} else {

p.back().second += 1;

}

} else {

p.push_back({c, 1});

}

} else {

p.push_back({c, 1});

}

}

std::string res;

for (auto [c, freq] : p) {

res.append(freq, c);

}

return res;

}