Go: package main

import (
	"bufio"
	"os"
	"fmt"
)

func reverse(s string) string {
	runes := []rune(s)
	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
		runes[i], runes[j] = runes[j], runes[i]
	}
	return string(runes)
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Scan()
	input := scanner.Text()
	fmt.Println(reverse(input))
}

C++: #include <iostream>
#include <cmath>
#include <cstdio>
#include <algorithm>
#include <vector>
#include <sstream>
#include <string>
#include <cstdlib>
using namespace std;

// 一行取って、一番初めのTを習得
template <class T> int streamvar(std::istream& in, T& var)
{
    string s;
    if (!in) {
        return 1;
    }
    getline(in, s);
    istringstream is(s);
    is >> var;
    if (is.fail()) 
        return 1;
    return 0;
}
// 一行取って、T vectorに格納する
template <class T> int streamvec(std::istream& in, std::vector<T> &v)
{
    v.clear();
    string s;

    if (!in) 
        return 1;
    getline(in, s);
    if (in.fail()) 
        return 1;
    istringstream is(s);
    while (1) {
        T tmp;
        is >> tmp;
        if (is.fail())
            break;
        v.push_back(tmp);
    }
    return 0;
}

#define EPS 1e-6
int main(void)
{
    string s;
    while (cin >> s) {
        string tmp;
        for (int i = 0; i < s.length(); i++)
            tmp += s[s.length() - i - 1];
        cout << tmp;
    }
    return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <string>
using namespace std;

int main(void)
{
    string str;
    cin >> str;
    reverse(str.begin(), str.end());
    cout << str << endl;
    return 0;
}

C++: #include<stdio.h>
#include<string.h>
int main(void)
{
	char a[20];
	int i,s;
	scanf("%s",a);
	s=strlen(a);
	for(i=s-1;i>=0;i--){
		printf("%c",a[i]);
	}
	printf("\n");
	return 0;
}

C++: #include<iostream>
#include<string>

using namespace std;

int main()
{
	string str;
	
	cin >> str;
	
	for(int i = str.length(); i > -1; i--){
		cout << str[i-1s] << flush;
	}
	cout << endl;
}

C++: #include<iostream>
#include<string>
 
int main(){
    std::string st;
    std::cin >> st;
     
    while(!(st.empty())){
        std::cout << st.back();
        st.pop_back();
    }
    std::cout << std::endl;
    return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main(){
    string str;
    cin >> str;
    reverse(str.begin(),str.end());
    cout << str << endl;
}

C++: #include<iostream>
#include<string>

using namespace std;

int main()
{
	string str;
	
	cin >> str;
	
	for(int i = str.length(); i > -1; i--){
		cout << str[i-1] << flush;
	}
	cout << endl;
}

C++: #include <iostream>
#include <string>

using namespace std;


void displayAnswer(const string& str) {
	for(auto ite = str.rbegin(); ite != str.rend(); ++ite)
		cout << *ite;
	cout << endl;
}


void doAllProcess() {
	string buffer;

	getline(cin, buffer);

	displayAnswer(buffer);
}


int main() {
	doAllProcess();

	return 0;
}

C++: #include <algorithm>
#include <iostream>
#include <string>

using namespace std;

int main(int argc, char const* argv[])
{
	std::string s;
	std::cin >> s;
	std::reverse(s.begin(),s.end());
	std::cout << s;
	return 0;
}

C++: #include <stdio.h>
#include <string.h>
int main ()
{
char str[20];
while(scanf("%s",str)!=EOF)
{
	strrev(str);
printf("%s",str);
printf("\n");
}
return 0;
}

C++: #include<stdio.h>
int main(){
char str[21];
int i;
scanf("%s",str);
for(i=0;i=100;i++){
if(str[i]==/0)
i=100
}
for(;i>0;i--){
printf("%s",str[i]);
}
printf("\n");
}

C++: #include <iostream>
#include <string>

using namespace std;

int main() {
    string str;
    cin >> str;

    for (int i = str.size() - 1; i >= 0; --i) {
        cout << str[i];
    }
    cout << endl;
}

C++: #include<stdio.h>
int main(){
	char str[20];
	int i,j;
	scanf("%s",str);
	
	for(i = 0; str[i] != '\0'; i++){
	}
	
	for(j = i-1; j > -1; j--){
		printf("%c",str[j]);
	}
	
	puts("");
	
	return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

string reverseString(string str){
	string strTemp;
	
	for(int i=0 ; i<str.size() ; i++){
		strTemp[str.size()-i-1] = str[i];
	}
	for(int i=0 ; i<str.size() ; i++){
		str[i] = strTemp[i];
	}
	return str;
} 
 
int main(){
	string str;

	while ( cin >> str ) {
		cout << reverseString( str ) << endl;
	}
}

C++: #include<iostream>
#include<algorithm>
//#include<cmath>
#include<string>
//#include<cctype>
//#include <vector>
using namespace std;
int main(){
	string s;
	cin >> s;
	reverse(s.begin(), s.end());
	cout << s << endl;
	return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

int main(){
    string str;
    cin >> str;
    for (long i = str.size()-1; i >= 0; i--) {
        cout << str[i];
    }
    cout <<endl;
    return 0;
}

C++: #include <stdio.h>
#include <string.h>

int main(void) {
  char s[100] = {0};
  int i = 0;
  scanf("%s", s);
  i = sizeof(s)-2;
  while(i >= 0)
  putchar(s[i--]);
  
  putchar('?\n');
  return 0;
}

C++: #include<iostream>
#include<string>

int main(){
	std::string st;
	std::cin >> st;
	
	while(!(st.empty())){
		std::cout << st.back();
		std::st.pop_back();
	}
	std::cout << std::endl;
	return 0;
}

C++: print(reversed(input()))

C++: #include <iostream>
#include <string>
using namespace std;

int main(){
  string x;
  cin >> x;
  for(int i=x.length()-1;i>=0;i--)
    cout << x[i];
  cout << endl;
  return 0;
}

C++: #include <iostream>
#include <string>

using namespace std;

int main() {
    int i,len;
    string ch;

    while(cin >> ch){

    len = ch.length();

    for(i = 0;i < len / 2;i++){
        int box = ch[i];
        ch[i] = ch[len - i];
        ch[len - i] = box;
    }

    for(i = 0; i <= len;i++){
        cout << ch[i];
    }
    cout << endl;

    }

    return 0;
}

C++: #include<iostream>
#include<stdio.h>
#include<string.h>
#include<math.h>
using namespace std;

#define MAX 1000

int main(void){

	char k[21];
	int c = 0;

	scanf("%s", &k);

	for (int i = 0; k[i] != '\0'; i++){
		c++;
	}

	for (int i = c; i >= 0; i--){
		printf("%c", k[i]);
	}
	printf("\n");
	
	return 0;
}

C++: #include <cstdio>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <string>

using namespace std;

int main(){
	string s;
	cin>>s;
	reverse(s.begin(),s.end());
	cout << s<< endl;

	return 0;
}

C++: #include <iostream>
#include <string>

using namespace std;

int main(void) {
	string text;
	
	getline(cin, text);
	
	for(int i = text.size() - 1; i >= 0; i--) {
		cout << text[i];
	}
	cout << endl;
	
	return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<string>
using namespace std;

int main(){
	char str[30]={};
	int i=0;
	
	while(cin>>str[i]) i++;
	
	for(;i>=0;i--) cout<<str[i];
	
	return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <string>
using namespace std;

int main() {
	string s;
	cin >> s;
	for (int i = s.size()-1;i >= 0;i--)
		cout << s[i];
	cout << endl;
}

C++: #include <iostream>
#include <string.h>
using namespace std;



int main() {
	char a[25];
	int i = 0;
	cin >> a;
	int b = strlen(a);
	for(b ;b>=0;b--)
		cout << a[b] ;
	return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

int main() {
	char str[25];
	cin >> str;
	for (int i = 24; i >= 0; i--) {
		if (str[i] == '\0') continue;
		cout << str[i];
	}
	cout << endl;
	return 0;
}

C++: #include <iostream>
using namespace std;

int main(void)
{
	string str;

	cin >> str;

	for (int i = str.size() -1; i >= 0 ; i--) cout << str[i];
	cout << endl;
	
	return 0;
}

C++: #include <bits/stdc++.h>
#include <vector>
using namespace std;

string ilham, bojos;
int ndaru;
int main(){
	cin >> ilham;
	ndaru = ilham.length();
	for(int i = ndaru-1; i >= 0; i--){
		bojos = bojos + ilham[i];
	}
	cout << bojos << "\n";
	
	return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

int main()
{
    string s; cin >> s;
    reverse(s.begin(), s.end());
    cout << s << endl;
}