Go: package main

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

var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func readLine() string {
	buf := make([]byte, 0, 1000000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}

func toInt(str string) int {
	n, _ := strconv.Atoi(str)
	return n
}

func main() {
	lst := make([]int, 0)
	for i := 0; i < 10; i++ {
		lst = append(lst, toInt(readLine()))
	}
	sort.Ints(lst)
	for i := 9; i > 6; i-- {
		fmt.Println(lst[i])
	}
}

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

main(void){
    int num[10], i, high1 = 0, high2 = 0, high3 = 0;
    
    for( i = 0; i < 10; i++){
        scanf("%d", &num[i]);
        if( num[i] >= high1){
            high3 = high2;
            high2 = high1;
            high1 = num[i];
        }else if( num[i] >= high2){
            high3 = high2;
            high2 = num[i];
        }else if(num[i] >= high3){
            high3 = num[i];
        }
    }
    
    printf("%d\n%d\n%d\n", high1, high2, high3);

    return 0;
}

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

int main()
{
  int mt[10];
  int high[3];

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

  for(int i=0;i<3;i++)
    {
      high[i] = 0;
    }

  for(int i=0;i<10;i++)
    {
      if(mt[i]>high[0])
	{
	  high[2] = high[1];
	  high[1] = high[0];
	  high[0] = mt[i];
	}
      else if(mt[i]>high[1])
	{
	  high[2] = high[1];
	  high[1] = mt[i];
	}
      else if(mt[i]<=high[1] && mt[i]>high[2])
	{
	  high[2] = mt[i];
	}
    }

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

  return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <iomanip>
#include <algorithm>
#include <cmath>
using namespace std;
const int M = 100000;
const double pi = 3.141592653589;

int main()
{
	int  high[3] = { 0 };
	for (int i = 0; i < 10; i++) {
		int n;
		cin >> n;
		if (n > high[0]) {
			high[2] = high[1];
			high[1] = high[0];
			high[0] = n;
		}
		else {
			if (n > high[1]) {
				high[2] = high[1];
				high[1] = n;
			}
			else {
				if (n > high[2]) high[2] = n;
			}
		}
	}
	printf("%d\n%d\n%d\n", high[0], high[1], high[2]);
}

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

int main() {
    vector<int> h(10);
    for (int i = 0; i < 10; ++i) {
        cin >> h[i];
    }
    sort(h.rbegin(), h.rend());
    for (int i = 0; i < 3; ++i) {
        cout << h[i] << endl;
    }
}

C++: #include<iostream>
using namespace std;
int main()
{	
	int a[10] = {};
	int i = 0;
	while (cin >> a[i]) {
		i++;
		if (i == 10)break;
	}
	int max;
	for (int j = 0; j < 3; j++) {
		max = j;
		for (int k = j + 1; k < 10; k++) {
			if (a[max] < a[k]) {
				max = k;
			}
		}
		cout << a[max] << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
 
using namespace std;
 
vector<int> heights;
int input;
 
int main(){
 while(cin >> input) heights.push_back(input);
 sort(heights.begin(), heights.end());
 auto itr = heights.end()-1;
 cout << *itr << "\n" << *(itr-1) << "\n" << *(itr-2) << endl;
 
 return 0;
}

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

int main()
{
	int iHigh[10];

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

	sort( iHigh,iHigh+9,greater <int>() );

	for( int i=0;i<3;i++ ){
		printf("%d\n",iHigh[i]);
	}

	return 0;
}

C++: #include"iostream"

using namespace std;

int main()
{
	int a[10];
	int i,j,temp;
	for(i=0;i<10;i++)
		cin>>a[i];
	for(i=0;i<10;i++)
	{
		for(j=i+1;j<10;j++)
		{
			if(a[i]<a[j])
			{
				temp = a[i];
				a[i] = a[j];
				a[j] = temp;
			}
		}
	}
	for(i=0;i<3;i++)
		cout<<a[i]<<endl;
	return 0;
}

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

using namespace std;
typedef long long ll;
typedef pair<int, int> pint;
#define REP(i, n) for(int i = 0; i < (int)(n); i++)
#define IREP(i, n) for(int i = (int)(n) - 1; i >= 0; i--)
#define ALL(x) (x).begin(), (x).end()
#define MOD 1000000007
#define IMAX INT_MAX
#define IMIN INT_MIN
#define LMAX LLONG_MAX
#define LMIN LLONG_MIN
template<typename T> inline void chmin(T &a, T b){ if(a > b) a = b; }
template<typename T> inline void chmax(T &a, T b){ if(a < b) a = b; }
template<typename T> inline void xch(T &a, T &b){ T w = a; a = b; b = w; }

int main() {
    vector<int> a;
    REP(i, 10){
        int n;
        cin >> n;
        a.push_back(n);
    }
    sort(ALL(a));
    cout << a[9] << endl << a[8] << endl << a[7] << endl;
    
    return 0;
}

C++: #include<stdio.h>
int main(void){
	int i;
	int a[10];
	int x=0, y=0, z=0;
	
	for(i=0;i<10;i++){
		do{
			printf("山の高さ%d(整数)",i+1);
			scanf("%d",&a[i]);
		}while(a[i]<=0||10000<=a[i]);
		
		if(a[i]>x){
			z=y;
			y=x;
			x=a[i];
		}
		else if(a[i]>y){
			z=y;
			y=a[i];
		}
		else if(a[i]>z){
			z=a[i];
		}
	}
	
	printf("%d\n%d\n%d\n",x,y,z);
	
	return 0;
}

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

using namespace std;

int tmp;
vector<int> vec;

int main(){
    for (int i=0; i<10; i++) {
        scanf("%d",&tmp);
        vec.push_back(tmp);
        make_heap(vec.begin(),vec.end());
    }
    for (int i=0; i<3; i++) {
        printf("%d\n",vec.front());
        pop_heap(vec.begin(),vec.end());
        vec.pop_back();
    }
}

C++: #include<stdio.h>
#define SIZE 10

/**
 * 関数宣言
 */
void binarySort(int* datas, int size);

int main(){
	int heights[SIZE];
	int i;
	
	for(i = 0; i < SIZE; i++)
	{
		scanf(" %d", heights+i);
	}
	
	binarySort(heights, SIZE);
	binarySort(heights+1, SIZE-1);
	binarySort(heights+2, SIZE-2);
		
	for(i = 0; i < 3; i++)
	{
		printf("%d\n", heights[i]);
	}
	
	
    return 0;
}

void binarySort(int* datas, int size)
{
	int i;
	int tmp;
	
	for(i = size-1; i >= 0; i--)
	{
		if(datas[i] < datas[i+1])
		{
			tmp = datas[i];
			datas[i] = datas[i+1];
			datas[i+1] = tmp;
		}
	}
	
	return;
}

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

C++: #include <iostream>

int main(int argc, char ** argv) {
  int input, top[3] = {0};
  for (int i = 0; i < 10; i++) {
    std::cin >> input;
    if (input >= top[0]) {
      top[2] = top[1];
      top[1] = top[0];
      top[0] = input;
    }else if (input >= top[1]) {
      top[2] = top[1];
      top[1] = input;
    }else if (input >= top[2]) {
      top[2] = input;
    }
  }

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

C++: #include<stdio.h>
#include<algorithm>
#include<functional>

using namespace std;
int main()
{
    int p[10];
    int i;
    for(i=0;i<10;i++)
        scanf("%d",&p[i]);

        sort(p,p+10,greater<int>());

        for(i=0;i<3;i++)

        printf("%d\n",p[i]);
        return 0;

}

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

int main(){
    vector<int> heights(10);;
    for(int i = 0; i < 10; ++i){
        cin >> heights[i];
    }
    sort(heights.begin(), heights.end(), greater<int>());

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

    return 0;
}

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

int main() {
	int amount = 10;
	vector<int> mountains(10);
	for(int i = 0; i < amount; ++i) {
		cin >> mountains[i];
	}
	
	sort( mountains.begin(), mountains.end() );
	
	for(int i = 9; i > 6; --i) {
		cout << mountains[i] << endl;
	}
}