Go: package main

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

var maxint = 10000
var scanner = bufio.NewScanner(os.Stdin)

func nextInt() (int, error) {
	scanner.Scan()
	return strconv.Atoi(scanner.Text())
}

func main() {
	scanner.Split(bufio.ScanWords)
	arr := make([]int, 10)
	for i := range arr {
		n, _ := nextInt()
		arr[i] = n
	}

	sort.Slice(arr, func(i, j int) bool {
		return arr[i] >= arr[j]
	})

	arrStr := fmt.Sprintf("%+v", arr[0:3])
	arrStr = arrStr[1:(len(arrStr) - 1)]
	arrStr = strings.Replace(arrStr, " ", "\n", -1)
	fmt.Println(arrStr)
}

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

using namespace std;

void Top3Mountains(int m[10])
{
	deque<int> mountains;
	if ( m[0] >= 0 && m[0] <= 10000 &&
		m[1] >= 0 && m[1] <= 10000 &&
		m[2] >= 0 && m[2] <= 10000 &&
		m[3] >= 0 && m[3] <= 10000 &&
		m[4] >= 0 && m[4] <= 10000 &&
		m[5] >= 0 && m[5] <= 10000 &&
		m[6] >= 0 && m[6] <= 10000 &&
		m[7] >= 0 && m[7] <= 10000 &&
		m[8] >= 0 && m[8] <= 10000 &&
		m[9] >= 0 && m[9] <= 10000 ){

			mountains.push_back(m[0]);
			mountains.push_back(m[1]);
			mountains.push_back(m[2]);
			mountains.push_back(m[3]);
			mountains.push_back(m[4]);
			mountains.push_back(m[5]);
			mountains.push_back(m[6]);
			mountains.push_back(m[7]);
			mountains.push_back(m[8]);
			mountains.push_back(m[9]);

			sort(mountains.begin(),mountains.end(),greater<int>());

			deque<int>::iterator it = mountains.begin();

			int i=0;
			for(i=0;i<3; i++){
				cout << *it << endl;
				it++;
			}
	}
	return;
}

int main()
{
	int m[10] = {1819,2003,876,2840,1723,1673,3776,2848,1592,922};

	Top3Mountains(m);
	return 0;
}

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

int main()
{
	vector <int> v;
	for (int i = 0; i < 10; i++){
		int h;
		cin >> h;
		v.push_back(h);
	}
	sort(v.begin(), v.end(), greater<int>());
	for (int i = 0; i < 3;i++){
		cout <<v[i] << endl;
	}
	

	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <queue>
using namespace std;
priority_queue <int> mountain;
int m;
int main()
{
    while(cin>>m) mountain.push(m);
    int i=3;
    while(i) {
        printf("%d\n", mountain.top());
        mountain.pop();
        i--;
    }
    return 0;
}

C++: #include<iostream>
using namespace std;
int main() {
	int a[11],min1=-1,min2=-1,min3=-1, i,j,k,l;
	for (i = 1; i <= 10; i++) {
		cin >> a[i];
	}
	for (j = 1; j <= 10; j++) {
		if (a[j] > min1) {
			min1 = a[j];
		}
	}
	for (k = 1; k <= 10; k++) {
		if (a[k] > min2 && a[k]!=min1) {
			min2 = a[k];
		}
	}
	for (l = 1; l <= 10; l++) {
		if (a[l] > min3&&a[l]!=min2&&a[l]!=min1) {
			min3 = a[l];
		}
	}
	cout << min1 << endl << min2 << endl << min3  << endl;
	return 0;
}

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

int main()
{
    int i,j,a[10];
    for(i=0;i<10;i++)
    {
        scanf("%d",&a[i]);
    }
    sort(a,a+10);
    printf("%d\n%d\n%d\n",a[9],a[8],a[7]);
    return 0;
}

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

int main(){
	int nyuryoku,high,low,middle,flag;
	
	for(int i=0;i<10;i++){
	cin>>nyuryoku;
	if(flag==0){
	high = nyuryoku;
	}else{
	if(nyuryoku>low){
		if(nyuryoku>middle){
			if(nyuryoku>high){
				high = nyuryoku;
			}else{
				middle = nyuryoku;
			}low = nyuryoku;
		}
	}
	}
	cout<<highendl<<endl;
	cout<<middle<<endl;
	cout<<low<<endl;
return 0;
}

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

int main(){
  int t[10];

  for(int i = 0; i < 10; i++){
    cin >> t[i];
  }
  sort(t, t + 10);

  for(int i = 9; i >= 7; i--){
    cout << t[i] << endl;
  }
}

C++: #include <stdio.h>
int main(){

	int a[10],i,j,k;

	for(i=0;i<10;i++){
		scanf("%d",&a[i]);
	}

	for(i=0;i<10;i++){
		for(j=i+1;j<10;j++){
			if(a[i]<a[j]){
				k=a[i];
				a[i]=a[j];
				a[j]=k;
			}
		}
	}

	printf("%d%d%d",a[0],a[1],a[2]);

	return 0;
}

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

int main()
{
	int a = 0, b = 0, c = 0;
	const int BUFF_SIZE = 20;
	char buff[BUFF_SIZE];

	for (int i = 0; i < 10; i++)
	{
		 fgets(buff, BUFF_SIZE, stdin);
		int h = atoi(buff);
		
		if (h > a)
		{
			c = b;
			b = a;
			a = h;
		}
		else if (h > b)
		{
			c = b;
			b = h;
		}
		else if (h > c)
		{
			c = h;
		}
	}

	printf("%d\n%d\n%d\n", a, b, c);
	
	return 0;
}

C++: #include<iostream>
using namespace std;
int main()
{
    int i[3]={0};
    for(int j=0;j<=10;++j)
    {
        int height;
        cin>>height;
        if(height>=i[2])
        {
            if(height>=i[1])
            {
                if(height>=i[0])
                {
                    i[2]=i[1];
                    i[1]=i[0];
                    i[0]=height;
                }
                else
                {
                    i[2]=i[1];
                    i[1]=height;
                }
            }
            else
            {
                i[2]=height;
            }
        }
    }
    for(int j=0;j<=2;++j)
    {
        cout<<i[j]<<endl;
    }
}

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

int main()
{
	priority_queue< int,vector<int>,less<int> > que;
	int in;

	for(int i = 0; i < 10; i++){
		cin >> in;
		que.push(in);
	}


	for(int j = 0; j < 3; j++){
		cout << que.top() << '\n';
		que.pop();
	}

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(void)
{
  int a[10],n1=0,n2=0,n3=0;
  
  for(int i=0;i<10;i++){
    cin>>a[i];
      if(a[i]>=n1){
        n3=n2;
        n2=n1;
        n1=a[i];
      }
      else if(a[i]>=n2){
        n3=n2;
        n2=a[i];
      }
      else if(a[i]>=n3){
        n3=a[i];
      }
  }
  cout<<n1<<'\n'<<n2<<'\n'<<n3<<'\n';
}

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

int main() {
	int f=0,s=0,t=0,tmp;
	while(cin>>tmp, tmp!=EOF){
		if(f<tmp){f=tmp;}
		else if(s<tmp){s=tmp;}
		else if(t<tmp){t=tmp;}
	}
	cout<<f<<endl;
	cout<<s<<endl;
	cout<<t<<endl;
	return 0;
}

C++: #include <iostream>

int main()
{
    int n_1st;
    int n_2nd;
    int n_3rd;
    int n;
    
    n_1st = n_2nd = n_3rd = 0;

    while (std::cin >> n){
        if (n > n_1st){
            n_3rd = n_2nd;
            n_2nd = n_1st;
            n_1st = n;
        }
        else if (n > n_2nd){
            n_3rd = n_2nd;
            n_2nd = n;
        }
        else if (n > n_3rd){
            n_3rd = n;
        }
    }
    
    std::cout << n_1st << std::endl;
    std::cout << n_2nd << std::endl;
    std::cout << n_3rd << std::endl;
    
    return 0;
}