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#include "leetcode.h"
class Solution {
public:
string reverseStr(string s, int k) {
int len = s.size(), rem = len % (2 * k);
int start = 0, end = 2 * k, actual = len - rem;
string ans = "";
while (actual) {
string tmp = s.substr(start, end);
reverse(tmp.begin(), tmp.begin() + k);
start += 2 * k;
ans += tmp;
actual -= 2 * k;
}
if (rem > 0) {
if (rem < k) {
string tmp = s.substr(len - rem, rem);
reverse(tmp.begin(), tmp.end());
ans += tmp;
} else if (rem <= 2 * k) {
string tmp = s.substr(len - rem, rem);
reverse(tmp.begin(), tmp.begin() + k);
ans += tmp;
}
}
return ans;
}
};
int main() {
Solution obj;
cout << obj.reverseStr("abcdefg", 2);
}
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