Go: package main

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

func main() {
        var s string
        sc := bufio.NewScanner(os.Stdin)
        sc.Scan()
        s = sc.Text()
        fmt.Println(strings.ToUpper(s))
}

C++: //include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned long long ULL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

int main() {
  string str;

  getline(cin, str);


  REP(i, str.size()-1) {
    if(str[i] >= 'a' && str[i] <= 'z') cout << (char)(str[i]+('A'-'a'));
    else cout << str[i];
  }
  cout << endl;
}

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

#define REP(i, s, n) for (int i = s; i < n; ++i)
#define rep(i, n) REP(i, 0, n)
#define SORT(c) sort((c).begin(), (c).end())
#define IINF INT_MAX
#define LLINF LLONG_MAX
#define DEBUG false

int main()
{
    string hoge;
    getline(cin, hoge);
    rep(i, hoge.length())
    {
        if ('a' < hoge[i] && hoge[i] < 'z')
        {
            hoge[i] -= ('a' - 'A');
        }
    }
    cout << hoge << endl;
}

C++: #include <stdio.h>
int main() {char T;while (1) {T=getchar();if (T==EOF) break;if (T>='a' && T<='z') T-=32;putchar(T);}puts("");return 0;}

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

using namespace std;

int main(void)
{
	string str;
	getline(cin,str);
	for(int i=0;i<str.length();i++)
	{
		if('a'<=str[i]&&str[i]<='z')
		{
			str[i]+='A'-'a';
		}
	}
	cout<<str<<endl;
	cin>>str;
}

C++: /*****include*****/
#include <iostream>
#include <fstream>
#include <string>

/*****デバッグ定義*****/
//#define DEBUG
/*****マクロ定義*****/

/*****名前空間*****/
using namespace std;

/*****グローバル変数置き場*****/

/*****その他関数置き場*****/

/*****main関数*****/
int main(){
	/*****ファイルオープン*****/
#ifdef DEBUG
	ofstream fout("output.txt");
	ifstream fin("input.txt");
	if(!fout || !fin){
		cout << "Can't open the file.\n";
		return;
	}
#endif
	/*****変数置き場*****/
	//string words;
	/*****処理部*****/
	//gets(words.c_str());
	/*int i=0;
	for(int i=0;i<words.length();i++){
		if(islower((int)words[i])){
			words[i] = toupper(words[i]);
		}
	}
	for(int j=0;j<i;j++){
		cout << words[j];
	}*/
	char letter;
	while(1){
		scanf("%c",&letter);
		if(letter == '\n')	break;
		if(islower((int)letter)){
			letter = toupper(letter);
		}
		cout << letter;
	}
	cout << endl;
	/*****処理終了後*****/
#ifdef DEBUG
	fout.close();
	fin.close();
#endif
	return 0;
}

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

#define loop(i,a,b) for(int i=(a); i<int(b); i++)
#define rep(i,b) loop(i,0,b)

int main(){
    string s;
    while(getline(cin,s)){
        rep(i,s.size()){
            s[i] = toupper(s[i]);
        }
        cout << s << endl;
    }
}

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

int main(){
	int i;
	string s;
	while(getline(cin, s)){
		for (i = 0; i < s.size(); i++) {
			if(s[i] >= 'a' && s[i] <= 'z'){
				s[i] = s[i] - 32;
			}
		}
		cout << s << endl;
	}
	return 0;
}

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


int main()
{
	string s;
	getline(cin, s);
	for (int i = 0; i < s.length(); i++){
		if ('a' <= s[i] && s[i] <= 'z'){
			s[i] = s[i] - ('a'- 'A');
		}
	}
	cout << s<<endl;
	return 0;
}

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

int main(){

  string str;
  getline(cin, str);

  for(int i=0;i<str.size();i++){
    if('a' <= str[i] && str[i] <= 'z'){
      str[i] += 'A' - 'a';
    }
  }

  cout << str << endl;
}

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

using namespace std;

int main()
{
	string s;
	getline(cin, s);

	transform(s.begin(), s.end(), s.begin(), ::toupper);

	cout << s << endl;

	return 0;
}

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

int main(){
	string s;
	getline(cin, s);
	transform (s.begin (), s.end (), s.begin (), ::toupper);
	cout << s << endl;

	return 0;
}

C++: #include<iostream>
#include<string>
using namespace std;
int main(){
  string s;
  getline(cin,s);
  for(int i=0; i<s.size(); i++) if(s[i]>='a' && s[i]<='z') s[i]+='A'-'a';
  cout <<s<<endl;
  return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int main(){

  char a[201],n=0;
  scanf("%c",&a[0]);
  while(a[n] != '\n'){
    
    if(a[n] >= 'A' && a[n] <= 'Z'){
      a[n] = a[n]-'A'+'a';
    }
    else if(a[n] >= 'a' && a[n] <= 'z'){
      a[n] = a[n]-'a'+'A';
    }
    n++;
    scanf("%c",&a[n]);
  }

  for(int i = 0;i < n;i++){
    printf("%c",a[i]);
  }
  cout << endl;
  return (0);
}

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

int main(){
  int i = 0;
  char str[129], str2[129];
  
  fgets(str, 128, stdin);

  while(1){
    if(str[i] == '.'){
      str2[i] = '.';
    }else if(str[i] == ' '){
      str2[i] = ' ';
    }else if(str[i] == '\n'){
      break;
    }else{
      str2[i] = str[i] - 'a' + 65;
    }

    i++;
  }
  
  cout << str2 << endl;

  return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	int c;
	while((c=getc(stdin))!='\n'){
		putc((c>='a' and c<='z')?c+'A'-'a':c,stdout);
	}
	return 0;
}

C++: #include<iostream>
#include<string>
using namespace std;
char Toupper(char c) {
  if(int('a')<=int(c) && int('z')>=(int)c)
    return (char)toupper(c);
  return c;
}
int main() {
  string s;
  getline(cin,s);
  string tmp="";
    for(int i=0;i<(int)s.size();i++) 
      tmp+=Toupper(s[i]);
    cout<<tmp<<endl;
  return 0;
}

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

string solve(string s){
	for(int i=0;i<s.size();i++){
		if(s[i]>='a' && s[i]<='z'){
			s[i]=(s[i]-'a'+'A');
		}
	}
	return s;
}

int main(){
	string str;
	
	while(getline(cin,str)){
		cout<<solve(str)<<endl;
	}
}

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

using namespace std;

int main()
{
	char a;
	
	for(;cin.get(a);)
	{
		if(a=='\n')
		{
			cout << endl;
			break;
		}
		a=toupper(a);
		cout << a ;
	}
}

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

int main(void){

	char inp;

	while(scanf("%c",&inp)!=EOF){
		putchar((inp>='a'&&inp<='z')?inp-32:inp);
	}
    return 0;
}