Go: package main

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

func main() {
        fp := os.Stdin
        scanner := bufio.NewScanner(fp)
        var lst [3]int

        for scanner.Scan() {
                num, _ := strconv.Atoi(scanner.Text())
                if lst[0] < num {
                        lst[2] = lst[1]
                        lst[1] = lst[0]
                        lst[0] = num
                } else if lst[1] < num {
                        lst[2] = lst[1]
                        lst[1] = num
                } else if lst[2] < num {
                        lst[2] = num
                }
        }

        for _, i := range lst {
                fmt.Printf("%d\n", i)
        }
}

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

int compare(const void *a, const void *b)
{
    return *(int*)b-*(int*)a ;
}
int main(void) {
	int i,c,buf,top[10];
	
	for(i = 0; 10 > i; i++){
		scanf("%d", &top[i]);
	}
	qsort(top, 10, sizeof(int), compare);
	printf("%d\n%d\n%d\n",top[0],top[1],top[2]);
	return 0;
}

C++: //↓template↓

#include "bits/stdc++.h"
using namespace std;
#define Would
#define you
#define all(n)  n.begin(),n.end()
const long long INF = 1e18;
const long long MOD = 1e9 + 7;
const double pi = acos(-1);
const int SIZE = 1 << 17;
int dx[] = { 1,0,-1,0 }, dy[] = { 0,1,0,-1 }, alp[30];
long long fac[200005], finv[200005], inv[200005];
vector<long long>dij;
struct edge { long long to, cost; };
vector<vector<edge> >G;

long long mod_pow(long long a, long long b) {
	long long res = 1, mul = a;
	for (int i = 0; i < 31; ++i) {
		if (b >> i & 1) {
			res *= mul;
			res %= MOD;
		}
		mul = (mul * mul) % MOD;
	}

	return res;
}

void addedge(int from, int to, int cost) {
	G[from].push_back({ to,cost });
	G[to].push_back({ from,cost });
}

//↑template↑


int main() {
	vector<int>v;
	for (int i = 0; i < 10; ++i) {
		int n;
		cin >> n;
		v.push_back(n);
	}
	sort(all(v));
	reverse(all(v));
	cout << v[0] << endl << v[1] << endl << v[2] << endl;
}

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

int mountain[12]

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

  cout << mountain[9] << endl
  << mountain[8] << endl
  << mountain[7] << endl;
}

C++: #include <cstdio>
int main(){
 int top3[3];
 int i,tmp,data;
 for(i=0;i<10;i++){
  scanf("%d",&data);
  if (top3[2]>data) {} 
  else {
   top3[2]=data;
   if (top3[1]>data) {} 
   else {
    top3[2]=top3[1];
    if (top3[0]>data) top3[1]=data;
    else {
     top3[1]=top3[0];
     top3[0]=data;
    };
   };
  };
 };
 for(i=0;i<3;i++)
    printf("%d\n",top[i]);
};

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>
#include <queue>

using namespace std;

int main()
{
	priority_queue<int> pque;
	int h;

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

	for(int i=0; i<3; i++){
		cout << pque.top() << endl;
		pque.pop();
	}

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	int a[10],b;
	for(int i=0;i<10;i++){
		cin>>a[i];
  }
   for(int i=0;i<10;i++){
	   for(int j=i+1;j<10;j++){
		   if(a[i]<a[j]){
			   b=a[i];
			   a[i]=a[j];
			   a[j]=b;}
	         }

	   }

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

C++: #include<stdio.h>
int main(){
	int a;
	int a[10];
	int i;
	int j;
	for(i=0;i<10;i++){
		scanf("%d",&a[i]);
	}
	for(i=0;i<9;i++){
			for(j=0;j<9-i;j++){
				if(a[j]<a[j+1]){
					int temp =a[j];
					a[j]=a[j+1];
					a[j+1]=temp;
				}
			}
	}
					for(i=0;i<3;i++){
						printf("%d\n",a[i]);
					}
						return 0;

C++: #include <iostream>

using namespace std;

int main(void)
{
	int input[10];

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


	for(int i = 3; i < 10; i++){
		for(int j = 0; j < 3; j++){
			if(input[i] > input[j]){
				input[j] = input[i];
				break;
			}
		}
	}

	sort(input, input+2);

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


	return 0;
}

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

using namespace std;
void main()
{
clrscr();
int mount[10];
for(int i=0;i<10;i++)
{
cin >> mount[i];
}
int max[3];
max[0] = mount[0];
max[1] = mount[0];
max[2] = mount[0];
for(i=1;i<10;i++)
{
if(mount[i]>max[0])
{
max[0] = mount[i];
}
}
for(i=1;i<10;i++)
{
if(mount[i]>max[1]&&mount[i]!=max[0])
{
max[1] = mount[j];
}
}
for(i=1;i<10;i++)
{
if(mount[i]>max[2]&&mount[i]!=max[0]&&mount[i]!=max[1])
{
max[2] = mount[j];
}
}
cout << max[0] << endl;
cout << max[1] << endl;
cout << max[2] <<endl;
getch();
}
}

C++: #include<stdio.h>
#include<algorithm>
using namespace std;
int main()
{
    int i,x[50]= {0};
    for(i=0; i<10; i++)
    {
        scanf("%d",&x[i]);
    }
    sort(x,x+10);
    printf("%d\n%d\n%d\n",x[9],x[8],x[7]);
    return 0;
}

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

int main() {
	int a[10] = {};

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

	cout << a[9] << endl;
	cout << a[8] << endl;
	cout << a[7] << endl;
}

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

using namespace std;

const int numOfMountain = 10;

int main(){
    int mountainBuf;
    vector<int> mountains;

    for(int i = 0; i < numOfMountain; i++) {
        cin >> mountainBuf;
        mountains.push_back(mountainBuf);
    }

    sort(mountains.begin(), mountains.end());

    vector<int>::iterator out = mountains.end();
    for(int i = 0; i < 3; i++) {
        out--;
        cout << *out << endl;
    }

    return 0;
}

C++: #include <iostream>

using namespace std;

int main(){
  int i=0;
  int input=-1;//入力
  int max =-1,mid = -1,min = -1;


  while(cin >> input ){
    if( min < input){
       min = input;
    }

    if(min > mid){
      swap(min,mid);
    }

    if(mid>max){
      swap(mid,max);
    }

  }

cout <<  max<<"\n"
<< mid<<"\n"
<< min<<"\n";

  return 0;
}

C++: #include<stdio.h>
int main(void){
	int d, m1 = 0, m2 = 0, m3 = 0, i;{
	scanf("%d", &d);
		for(i=1;i<10;i++){
			scanf("%d", &d);
			if(d > m1){
			m3 = m2;
			m2 = m1;
			m1 = d;
				}else if(d > m2){
				m3 = m2;
				m2 = d;
					} else if(d > m3){
					m3 = d;
					}
		}
	printf("%d\n""%d\n""%d\n", m1, m2, m3);
	return 0;
}
}

C++: #include<stdio.h>
int main(void){
	int i,j,a=0,b=0,c=0,yama;
	
	for(i=0;i<=9;i++){
		scanf("%d",&yama);
		
		if(a<yama){
			
			c=b;
			b=a;
			a=yama;
			
		}else if(b<yama){
			
			c=b;
			b=yama;
			
		}else if(c<yama){
			
			c=yama;
			
		}
	}
	
	printf("%d\n%d\n%d\n",a,b,c);
	
	return 0;
}

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

int main(){
  int Mt[10];
  int s;
  int i, j;
  for (i = 0; i <= 9; i++){
    cin >> Mt[i];
  }

  for (i = 1; i <= 3; i++){
    for (j = 8; j >= 0; j--){
      if (Mt[j] <= Mt[j + 1]){
        s = Mt[j];
        Mt[j] = Mt[j + 1];
        Mt[j + 1] = s;
      }
    }
  }

  cout << Mt[0];
  for (i = 1; i <= 2; i++){
    cout << "\n" << Mt[i];
  }
  return (0);
}

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

using namespace std;

int main()
{
    vector<int> list;

    for (int i = 0; i < 10; ++i) {
        int tmp;
        cin>>tmp;
        list.push_back(tmp);
    }
    sort(list.begin(),list.end(),greater<int>());
    for (int j = 0; j < 3; ++j) {
        cout<<list[j]<<endl;
    }
    return 0;
}

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

int main(void) {
    std::priority_queue<u_int> heights;
    //??\???
    for (u_int h, i = 0; i < 10; ++i) {
        std::cin >> h;
        heights.push(h);
    }
	//??????
    for (u_int i = 0; i < 3; ++i) {
        std::cout << heights.top() << std::endl;
        heights.pop();
    }
    return 0;
}

C++: a = []
10.times do
a << gets.to_i
end
a.sort!.reverse!
p a[0]
p a[1]
p a[2]