Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
	heights := make([]int, 10)
	for i := 0; i < 10; i++ {
		sc.Scan()
		heights[i], _ = strconv.Atoi(sc.Text())
	}

	sort.Sort(sort.Reverse(sort.IntSlice(heights)))
	for i := 0; i < 3; i++ {
		fmt.Println(heights[i])
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define REPR(i,n) for(int i=n; i>-1; --i)
#define ALL(a) (a).begin(),(a).end()
#define FILL(a,x); REP(i,sizeof(a)){ (a)[i]=(x); }
#define CINA(a,n); REP(i,(n)){ cin >> (a)[i]; }
#define FILL2(a,n,m,x); REP(i,(n)){ REP(j,(m)){(a)[i][j]=(x);} }
#define CINA2(a,n,m); REP(i,(n)){ REP(j,(m)){cin >> (a)[i][j];} }
#define Liny "Yes\n"
#define Linn "No\n"
#define LINY "YES\n"
#define LINN "NO\n"

#define umap unordered_map
//cout << setfill('0') << right << setw(4) << 12; // "0012"
int keta(ll x){ if(x<10){return 1;} else{return keta(x/10) + 1;}}
int keta_wa(ll x){ if(x<10){return x;} else{return keta_wa(x/10) + x%10;} }
int ctoi(char c){ return ( (c>='0' && c<='9')? c - '0': 0 );}
ll sum(ll a[],ll N){ return accumulate(a,a+N,0LL);}
ll gcd(ll a,ll b){if(a<b)swap(a,b); return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){if(a<b){swap(a,b);} return a/gcd(a,b)*b;}

int main(){
  int h[10];
  REP(i,10){ cin>>h[i];}
  sort(h,h+10,greater<int>());
  REP(i,3){ cout << h[i] <<"\n";}
}

C++: 
#include <iostream>
#include <algorithm>
using namespace std;
int main(){
        int a[10],i;
        for(i=0;i<10;i++) cin >> a[i];
        sort(a,a+10,greater<int>());
        for(i=0;i<3;i++) cout << a[i] << endl;
        return 0;
}
~                                                                                                                                                                                    
~                                                                                                                                                                                    
~

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

int main() {
	int a[10];
	for(int i=0;i<10;i++){
		cin >> a[i];
	}
	for(int i=1;i<10;i++)
		for(int j=0;j<i;j++){
			if(a[i]<a[j]){
				swap(a[i],a[j]);
			}
		}
		for(int k=9;k>=7;k--)	
			cout << a[k] << endl;
	
	return 0;
}

C++: // clang-format off
#include <bits/stdc++.h>
#define int long long
#define main signed main()
// #define main int main()
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define prec(n) fixed << setprecision(n)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
using namespace std;
using pii = pair<int, int>;
using vi = vector<int>;
using vd = vector<double>;
using vc = vector<char>;
using vb = vector<bool>;
using vs = vector<string>;
using vpii = vector<pii>;
using vvi = vector<vi>;
using vvb = vector<vb>;
using vvpii = vector<vpii>;
template<typename A> using fn = function<A>;
constexpr int INF = sizeof(int) == sizeof(long long) ? 1000000000000000000LL : 1000000000;
constexpr int MOD = 1000000007;
constexpr double PI = acos(-1);
template<typename A, typename B> bool cmin(A &a, const B &b) { return a > b ? (a = b, true) : false; }
template<typename A, typename B> bool cmax(A &a, const B &b) { return a < b ? (a = b, true) : false; }
constexpr bool odd(const int &n) { return n & 1; }
constexpr bool even(const int &n) { return !odd(n); }
void solve();
main { solve(); return 0; }
// clang-format on

void solve() {
  while (true) {}
}

C++: #include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int i,j,a[100],temp;
    for(i=0;i<10;i++){
        cin>>a[i];
    }
    for(i=0;i<10;i++){
        for(j=0;j<10-(i+1);j++){
            if(a[j]>a[j+1]){
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;
            }
        }
    }
    for(j=9;j>=7;j--){
        printf("%d\n",a[j]);
    }
    return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <vector>
#include <string>
using namespace std;
int main() {
  vector<int> a(10);
  int max;
  size_t idx;
  vector<int>::iterator itr;
  
  for(size_t i = 0; i < a.size(); ++i) {
	cin >> a[i];
  }

  for(int i = 0; i < 3; i++) {
	itr = max_element(a.begin(), a.end());
	idx = distance(a.begin(), itr);
	cout << *max_element(a.begin(), a.end()) << endl;
	a[idx] = 0;
  }
  return 0;
}

C++: #include<iostream>
using std::cin;
using std::cout;
using std::endl ;
int main()
{
	int b[10];
	int i=0,j;
	for(;i<10;i++)
		cin>>b[i];
	int t;
	for(i=0;i<3;i++)
	{
		for(j=0;j+i<9;j++)
			while(b[j]>b[j+1])
			{	t=b[j];b[j]=b[j+1];b[j+1]=t;}
		cout<<b[j]<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <cmath>
#include <cstdio>
#include <string>
#include <sstream>

using namespace std;

#define rep(i, n) for(int i = 0; i < (int)n; ++i)
#define repn(i, n) for(int i = 1; i <= (int)n; ++i)
#define pb push_back
#define lb lower_bound
#define mp make_pair
#define ite iterator
#define max2(x, y) ((x) > (y)) ? (x) : (y)
#define max3(x,y,z) max2((x), max2((y),(z)))
#define max4(v,w,x,y) max2(max2((v),(w)), max2((x),(y)))
#define min2(x, y) ((x) > (y)) ? (y) : (x)
#define min3(x,y,z) min2((x), min2((y),(z)))
#define min4(v,w,x,y) min2(min2((v),(w)), min2((x),(y)))
#define ul unsigned long
#define ull unsigned long long
#define INF 1000000007
#define MOD 1000000007
#define fs first
#define sd second

template<typename T>
bool elem(set<T> st, T val){
	return (st.find(val) != st.end());
}

template<typename T>
void printv(vector<T> vt){
    rep(i, vt.size() - 1)
        cout << vt[i] << " ";
    cout << vt[vt.size() - 1] << endl;
}

typedef vector<int> vint;
typedef vector<ul> vul;
typedef vector<ull> vull;
typedef pair<int, int> pii;

int main(void){
    vint a;
    int d;
    while(cin >> d) a.pb(d);
    sort(a.begin(), a.end());
    rep(i, a.size())
        cout << a[i] << endl;
    return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
 
__int128 a[15];
 
int main(){
    for(int i=0;i<10;i++){
        cin>>a[i];
    }
    sort(a, a+10);
    cout<<a[9]<<endl
        <<a[8]<<endl
        <<a[7]<<endl;
}

C++: #include<bits/stdc++.h>
using namespace std;
bool myfun(int a,int b){
    return a > b;
}
int main()
{
    int n;
    vector<int>vec;
    vector<int>::iterator it;
    for(int i=1;i<=10;i++){
        cin>>n;
        vec.push_back(n);
    }
    sort(vec.begin(),vec.end(),myfun);
    for(int i=0;i<3;i++){
        cout<<vec[i]<<endl;
    }
    return 0;
}

C++: #include<iostream>
 using namespace std;
int main(){
int input[10];
int first;
int second;
int third;
for(int i=0,i<10,i++){
cin>>input[i];
if(first<input){first = input[i];}else 
if(second<input){second = input[i];}else 
if(third<input){third = input[i];}
}
cout<<first<<endl;cout<<second<<endl;cout<<third<<endl;
return 0;

}

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

const static int MAX = 10000;

int main() {
    int R[MAX]={0};
    int e;

    for (int i=0; i < 10; i++ ) {
        cin >> e;
        R[e]=e;
    }

    int cnt = 0;
    for (int j = MAX; j >= 0 ; j--){

        if  (cnt >= 3) break;

        if (R[j] != 0){
            cout << R[j] << endl;
            cnt++;
        }
    }
    return 0;
}

C++: #include<iostream>
#include<vector>
#include<algorithm>
#include<functional>

using namespace std;

int main()
{
  vector<int> data;

  for(int i=0;i<10;i++)
  {
    int input;
    cin>>input;
    data.push_back(input);
  }
  
  sort(data.begin(),data.end(),greater<int>());

  for(int i=0;i<3;i++)
  {
    cout<<data[i]<<endl;
  }
}