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<algorithm>
using namespace std;

int main(){
  double h[10];
  int n=0;

  while(cin>>h[n]){
    n++;
    if(n==10)break;
  }
  sort(h,h+n);
  cout<<h[9]<<endl<<h[8]<<endl<<h[7]<<endl;

    return 0;
}

C++: #include<string>
#include<vector>
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<sstream>
#include<functional>
#include<map>
#include<set>
#include<cmath>
#include<iomanip>

#define REP(i,s,e) for(int i=int(s);i<=int(e);i++)
#define rep(i,n) for(int i=0;i<int(n);i++)

using namespace std;

int main(){

	vector<int>v(10);

	int l;
	rep(i,10){
	cin >> l;
	v.push_back(l);
	}

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

	cout << v[0] << endl;
	cout << v[1] << endl;
	cout << v[2] << endl;

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
        int heights[10];
        for (int i = 0; i < 10; i++){
                cin>>heights[i];
        }
        int t3[3];
        for (int i = 0; i < 3; i++){
                t3[i]=0;
        }
        for (int i = 0; i < 10; i++){
                if(heights[i] > t3[0]){
                        t3[2] = t3[1];
                        t3[1] = t3[0];
                        t3[0] = heights[i];
                }else if (heights[i] > t3[1]){
                        t3[2] = t3[1];
                        t3[1] = heights[i];
                }else if (heights [i] > t3[2]){
                        t3[2] = heights[i];
                }
        }
        for (int i = 0; i < 3; i++){
                cout<<t3[i]<<"\n";
        }
        return 0;
}

C++: #include <stdio.h>

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

	for(int i=0; i<10; i++){
		do{
			scanf("%d", &mt[i]);
		}while(mt[i]<1 && mt[i]>10000);
	}

	for(int i=0; i<9; i++){
		for(int j=i; j<10; j++){
			int tmp;
			if(mt[i]<mt[j]){
				tmp = mt[i];
				mt[i] = mt[j];
				mt[j] =tmp;
			}
		}
	}

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

	return 0;
}

C++: #import<algo.h>
main(){int i=0,h[10];for(;i<10;)cin>>h[i++];sort(h,h+10);for(i=9;i>6;)cout<<h[i--]<<endl;exit(0);}

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

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

C++: #include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;


void sort(int *height, int num){
  int max=0;
  int tmpi;
  for(int i=0;i<num;i++){
    if(max<height[i]){
      max = height[i];
      tmpi = i;
    }
  }

  //  cout << "max: " << max << endl;
  
  //i??¨num?????????
  int tmp = height[num-1];
  height[num-1] = height[tmpi];
  height[tmpi] = tmp;
}

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

  sort(height, 10);
  sort(height, 9);
  sort(height, 8);

  //  cout << endl;
  
  for(int i=9;i>6;i--){
    cout << height[i] << endl;
  }


  
}

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

  int m[10],i,j,blank;

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

  for(i = 0; i < 9; i++){

    for(j = 0; j < 9; j++){

      if(m[j] > m[j+1]){

        blank=m[j];
        m[j]=m[j+1];
        m[j+1]=blank;

      }

    }

  }

  printf("%d\n%d\n%d\n",m[9],m[8],m[7]);

  return 0;

}

C++: #include<stdio.h>
#include<algorithm>
#include<iostream>
using namespace std;         
int main(void){
    /* 宣言と初期化 */
    int hai[10];
    int id[2];
    int i;
    int temp2nd;
    int temp3rd;
    int tempmax;
             
for(i=0;i<10;i++)
{
   cin >> hai[i];
}
    /* 代入 */
    temp2nd=hai[0];
    tempmax=hai[0];
    temp3rd=hai[0];
    /* 計算 */
    for(i=0;i<10;i++){
        /* 最大値求める */
        if(hai[i]>tempmax)
       {tempmax=hai[i];id[0]=i;}
    }
    for(i=0;i<10;i++){
        /*2番目求める */
        if(hai[i]<tempmax&&hai[i]>temp2nd&& i != id[0])
        {temp2nd=hai[i];id[1]=i;}
    }
    for(i=0;i<10;i++){
        /* 3番目求める */
        if(hai[i]>temp3rd&&hai[i]<temp2nd && i != id[1] && i != id[0])
       {temp3rd=hai[i];}
    }
             
    /* 表示 */
    printf("%d\n",tempmax);
    printf("%d\n",temp2nd);
    printf("%d\n",temp3rd);
             
    return 0;
}

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

using namespace std;

using ll = long long;

int main(void) {
    vector<int> arr(10);
    for (int i = 0; i < 10; i++)
        scanf("%d", &arr[i]);
    sort(arr.rbegin(), arr.rend());
    printf("%d\n%d\n%d\n", arr[0], arr[1], arr[2]);
    return 0;
}

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

C++: #include <iostream>
#include <string>   
using namespace std;
 
int main(){
int rank[3],a[10],i = 0,ii = 0,b,c;
rank[0] = 0;
rank[1] = 0;
rank[2] = 0;
while(i <= 9){
	cin >> a[i];
	while(ii <= 2){
		if(rank[ii] < a[i]){
			b = 2 - ii;
			c = ii;
			while(c >= 1){
				c--;
				rank[c] = rank[c-1];
			}			
			rank[ii] = a[i];

			break;	
		}
		ii++;
	}
i++;
ii = 0;

}
cout<<rank[0]<<endl<<rank[1]<<endl<<rank[2]<<endl;




}

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

int main(){
int h[10];

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

a=0;
for(i=0; i<10; i++){
if(h[a]<h[i]) a=i;
}
cout << h[a] << endl;

h[a]=0;
a=0;
for(i=0; i<10; i++){
if(h[a]<h[i]) a=i;
}
cout << h[a] << endl;
h[a]=0;
a=0;
for(i=0; i<10; i++){
if(h[a]<h[i]) a=i;
}
cout << h[a] << endl;

return 0;
}

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

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

	for( int j = 0; j < 10; j++ ) {
		for ( int i = 0; i < 10-1; i++ ) {
			if( mt[ i ] < mt[ i+1 ] ) {
				int tmp = mt[ i+1 ];
				mt[ i+1 ] = mt[ i ];
				mt[ i ] = tmp;
			}
		}
	}

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

C++: #include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main(){
    int x[9],i;
    for(i=0;0<=i && i<10;++i){
        cin>>x[i];
           }
    sort(x,x+10);
    cout<<x[9]<<endl;
    cout<<x[8]<<endl;
    cout<<x[7]<<endl;
    return 0;
}

C++: 

#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <deque>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>

#define LLI long long
#define LLU unsigned long long
#define pi 2*acos(0.0)

#define scan(x) scanf("%d",&x)


int dir[8][2]={{-1,0}
              ,{1,0}
              ,{0,-1}
              ,{0,1}
              ,{-1,-1}
              ,{-1,1}
              ,{1,-1}
              ,{1,1}};


using namespace std;


int main()
{
    int mou[10];
    for(int i=0 ;i < 10 ; i++)
    {
        scan(mou[i]);
    }

    sort(mou,mou+10);

    printf("%d\n%d\n%d\n",mou[9],mou[8],mou[7]);

	return 0;
}