题解 | #字符串反转#

#include <iostream>
#include <string>

int main(int argc, char* argv[]){
    std::string str;
    std::cin >> str;
    for(int i = 0, j = str.size() - 1; i < j; ++i, --j){
        std::swap(str[i], str[j]);
    }
    std::cout << str << std::endl;
    return 0;
}