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<iostream>
using namespace std;

int main(){
  int num = 10;
  int height[num];

  for(int i=0; i<num; i++)
    cin >> height[i];

  int top3[3]={0,0,0};
  for(int i=0; i<num; i++) {
    for(int j=0; j<3; j++) {
      if(height[i] > top3[j]) {
        for(int k=2; k>j; k--)
          top3[k] = top3[k-1];
        top3[j] = height[i];
        break;
      }
    }
  }

  for(int i=0; i<3; i++)
    cout << top3[i] << endl;

  return 0;
}

C++: #include<iostream>

using namespace std;

int main()
{
	int high[10] = { };
	int first = 0, second = 0, third = 0;
	
	for(int i = 0; i < 10; i++){
		cin >> high[i];
		
		if(first <= high[i]){
			second = first;
			third = econd;
			first = high[i];
		}
		else if(second <= high[i]){
			third = second;
			second = high[i];
		}
		else if(third <= high[i])
			third = high[i];
	}
	
	cout << first << endl << second << endl << third << endl;
	
	
	return 0;
}

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

int compare_int(const void *a, const void *b)
{
    return *(int*)b - *(int*)a;
}


int main() {
	int a[10];
	
	for(int i = 0;i < 10;i++)
		cin >> a[i];
	
	qsort(a,10,sizeof(int),compare_int);
	
	for(int i = 0;i < 3;i++){
		cout << a[i];
		cout << "\n";
	}
	
	// your code goes here
	return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
int main(){

	int a[10];
	for(int i=0;i<10;i++){
		cin>>a[i];
	}
	sort(a,a+10,greater<int>());
	cout<<a[0]<<endl<<a[1]<<endl<<a[2]<<endl;

return 0;
}

C++: #include<bits/stdc++.h>
#include<iostream>
#include<algorithm>
// Whenever you start to believe  yourself, people also start to believe in you
using namespace std;
int cmpfunc (const void * a, const void * b)
{
   return ( *(int*)a - *(int*)b );
}
int main()
{
    int n=10;
   int ara[n];
   int i,j,k;
   for(i=0;i<n;i++)
   {
       cin>>ara[i];
   }
   qsort(ara,n, sizeof(int), cmpfunc);
   cout<<ara[n-1]<<endl;
   cout<<ara[n-2]<<endl;
   cout<<ara[n-3]<<endl;
    return 0;
}

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

int main() {

  typedef std::multiset<int> MySet;
  MySet heightSet;

  for(int i = 0; i < 10; ++i)
  {
    int val;
    cin >> val;
    // set ???????´?????????\????????¨??????????????????????????????
    heightSet.insert(val);
  }

  // ??§??????????????¢???????????????????????? reverse_iterator ?????????
  MySet::reverse_iterator rit = heightSet.rbegin();
  for(int i = 0; i < 3; ++i)
  {
    cout << *rit << endl;
    ++rit;
  }
  return 0;
}

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

using namespace std;

int main(){

  vector<int> mountain;
  int height;

  for(int i=0; i<10; i++){
    cin >> height;
    mountain.push_back(height);
  }

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

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

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

int main(){
  vector<int> A(10);

  for(int i=0; i<10; i++) cin >> A[i];

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

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

C++: #include<stdio.h>
int main(void)
{
	int a, b, max, max2, max3;
	for (a = 1; a <= 10; a++) {
		scanf("%d",&b);
		if (b > max) {
			max = b;
		}
		else if (b > max2) {
			max2 = b;
		}
		else if (b > max3) {
			b = max3;
		}
		printf("%d\n %d\n %d\n ", max, max2, max3);
		return 0;
	}
}

C++: #include<stdio.h>
int main(void)
{
	int i,j,n,temp;
	int data[10];
	n = 1;
	for(i=0; i<10; i++){
		n++;
		scanf("%d",&data[i]);
	}

	for(i=0; i<9; i++){
		for(j=i+1; j<10; j++){
			if(data[i] > data[j]){
				temp=data[i];
				data[i]=data[j];
				data[j]=temp;
			}
		}

	}

		printf("%d\n",data[9]);
		printf("%d\n",data[8]);
		printf("%d\n",data[7]);
	return 0;
}

C++: #include<stdio.h>

int main(void){

    /* 宣言と初期化 */
    int hai[10];
    int i;
    int temp2nd;
    int temp3rd
    int tempmax;

for(i=0;i<10;i++)
{
printf("山の高さ　");
scanf("%d",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];
    }

    for(i=0;i<=10;i++){
        /*2番目求める */
        if(hai[i]<tempmax&&hai[i]>temp2nd)
        temp2nd=hai[i];
    }

    for(i=0;i<=10;i++){
        /* 3番目求める */
        if(hai[i]>temp3rd&&hai[i]<temp2nd)
        temp3rd=hai[i];
    }

    /* 表示 */
    printf("最も高い山の高さ　%d\n",tempmax);
    printf("２番目に高い山の高さ　%d\n",temp2nd);
    printf("３番目に高い山の高さ　%d\n",temp3rd);

    return 0;
}

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

#define MAX 1000000
#define INF 200000000
#define MOD 1000000007

typedef long long ll;
typedef unsigned long long llu;

using namespace std;

int dx[]={-1,0,1,0};
int dy[]={0,-1,0,1};

void IO()
{
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
}

int arr[15];

bool cmp(int a, int b)
{
    return a>b;
}

int main()
{
    //IO();
    for(int i=0;i<10;i++)scanf("%d",&arr[i]);
    sort(arr,arr+10,cmp);
    for(int i=0;i<3;i++)printf("%d\n",arr[i]);
    return 0;
}

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

using namespace std;

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

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

int i,j,a[12];

int comp(const void *p,const void *q){
	return *(int *)q-*(int *)p;
}

int main(){
	//scanf("%d",&a[0]);
	for(i=0;i<10;i++)scanf("%d\n",&a[i]);
	
	qsort(a,10,sizeof(int),comp);
	
	printf("%d\n",a[0]);
	printf("%d\n",a[1]);
	printf("%d",a[2]);
	
	return 0;
}

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

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

#define REP( i, n )	for( int (i) = 0; (i) < (n); (i)++ )
#define ALL( x )	(x).begin(), (x).end()

int main() {
	vector<int> m(10);
	REP( i, 10 ) cin >> m[i];

	sort( ALL(m), greater<int>() );
	cout << m[0] << endl << m[1] << endl << m[2] << endl;
	
}

C++: #include<iostream>
#include<vector>
int main(){
	std::vector<int> vec(10);
	for(int i=0;i<10;i++){
		std::cin>>vec[i];
	}
	while(1){
		int a,b=0;
		for(int j=0;j<10;j++){
			if(vec[j]>vec[j+1]&&j+1<10){
				a=0;
				a=vec[j];
				vec[j]=vec[j+1];
				vec[j+1]=a;
				b++;
			}
		}
		if(b==0)break;
	}
	for(int i=9;i>=7;i++){
		std::cout<<vec[i]<<std::endl;
	}
	return 0;
}