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 <iostream>
//#include <iomanip>
//#include <vector>
#include <string>
#include <algorithm>
#include <functional>

using namespace std;

int main(){

	int h[10];

	for (int i = 1; i <= 9; i++){
		cin >> h[i];
	}

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

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

	return 0;
}

C++: #include <iostream>

int main(){
	int first=0,second=0,third=0,height;
	for(int i=0;i<10;++i){
		height=get();
		if(height>first){
			second=first;
			first=height;
		}
		else if(height>second){
			third=second;
			second=height;
		}
		else if(height>third){
			third=height;
		}
	}
	std::cout<<first<<'\n'<<second<<'\n'<<third<<'\n';
	return 0;
}

C++: #include <stdio.h>
#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <string>
#include <string.h>
#include <queue>
#include <map>
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
#define MAX_N 105
int vx [4]= {1,0,-1,0};
int vy [4]= {0,1,0,-1};
long long  dp[MAX_N][21]={};//dp[iテァツ閉ェテァツ崢ョテ」ツ?セテ」ツ?ァテ」ツ?ォ][テ・ツ?、]テッツシツ敕・ツ?凝ヲツ閉ー
int V[MAX_N],W[MAX_N];
int data[MAX_N],B[MAX_N];
int K ,N,a[MAX_N];
using namespace std;
void init(){

  /*cin >> N;
  cin >> a[1];
    dp[1][a[1]]=1;
  for(int l= 2;l<=N-1;l++){
    cin >> a[l];
    for(int i= 0;i<=20;i++){
      if(i-a[l]>=0&&i-a[l]<=20) dp[l][i] += dp[l-1][i-a[l]];
      if(i+a[l]>=0&&i+a[l]<=20) dp[l][i] += dp[l-1][i+a[l]];
    }
      //REP(i,21)cout<<l<<':'<< i<<' '<<dp[l-1][i]<<endl;
  }
  //REP(i,21)cout<< i<<' '<<dp[N-1][i]<<endl;
  cin >> a[N];
  cout << dp[N-1][a[N]]<<endl;
  */
}
void solve(){
  init();

}
int main(){
    vector<int>h ;
    int t;
    REP(i,10)
    {cin >> t;
    h.push_back(t);
  }
  sort(h.begin(),h.end());
  reverse(h.begin(),h.end());
  REP(i,3)cout << h[i]<<endl;
}

C++: #include <stdio.h>
#include <math.h>
 
int main() {
    int m[10];
    int ans[3];
    for(int i=0; i<10; i++) scanf("%d", &m[i]);
 
    ans[0] = 0; ans[1] = 0; ans[2] = 0;
    for(int j=0; j<10; j++) {
        if(m[ans[0]] < m[j]) {
            ans[0] = j;
        }
    }
    if(ans[1] == ans[0]) {
        if(ans[1] == 0) ans[1] = 1;
        else ans[1] = ans[0]-1;
    }
    for(int j=0; j<10; j++) {
        if(m[ans[1]] < m[j] && ans[0] != j) {
            ans[1] = j;
        }
    }
    if(ans[2] == ans[0]) {
        if(ans[2] == 0) ans[2] = 2;
        else ans[2] = ans[0]-2;
    }
    for(int j=0; j<10; j++) {
        if(m[ans[2]] < m[j] && ans[0] != j && ans[1] != j) {
            ans[2] = j;
        }
    }
    printf("%d\n%d\n%d\n", m[ans[0]], m[ans[1]], m[ans[2]]);
    return 0;
}

C++: #include <iostream>
#include <stdlib.h>
#include <string.h>
#include <sstream>
#include <iostream>
#include <math.h>
#include <iomanip>

using namespace std;

string float_to_string(float f, int digits)
{
  if (f == 0) {
    f = 0;
  }
  ostringstream oss;
  oss << setprecision(digits) << setiosflags(ios::fixed) << f;
  return oss.str();
}

void calc_and_output(int *c)
{
  float x = (float)(c[1]*c[5]-c[2]*c[4])/(c[1]*c[3]-c[0]*c[4]);
  float y = (float)(c[0]*c[5]-c[2]*c[3])/(c[0]*c[4]-c[1]*c[3]);

  cout << float_to_string(x, 3) << " " << float_to_string(y, 3) << endl;
}

int main(int argc, char const* argv[])
{
  int c[6];

  string line;
  while (getline(cin, line)) {
    istringstream iss(line);
    int val;
    int c[6];
    for (int i = 0; i < 6; i++) {
      iss >> val;
      c[i] = val;
    };

    calc_and_output(c);
  }

  return 0;
}

C++: //include----------------------------------------------------------------------------------------------------------------------
#include <bits/stdc++.h>
 
//using namespace--------------------------------------------------------------------------------------------------------------
using namespace std;
 
//define-----------------------------------------------------------------------------------------------------------------------
#define rep(i, n) for(int i = 0; i < (int)n; i++)
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define INF 1 << 25
#define CLR(a) memset((a), 0 ,sizeof(a))
#define dump(x) cerr << #x << " = " << (x) << "\n";
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)
 
//typedef----------------------------------------------------------------------------------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned int uint;
typedef unsigned long long ull;
 
//const------------------------------------------------------------------------------------------------------------------------
const double EPS = 1e-10;
const double PI = acos( -1.0 );
 
//global-----------------------------------------------------------------------------------------------------------------------
vector<int> a(10);
 
//function---------------------------------------------------------------------------------------------------------------------
int main() {
    rep( i, 10 ) {
        scanf( "%d", &a[ i ] );
    }
    sort( a.begin(), a.end() );
    ROF( i, 9, 7 ) {
        printf( "%d\n", a[ i ] );
    }
    return 0;
}

C++: #include <iostream>
#include <algorithm>
using namespace std;
#define rep(i,a) for(int i = 0 ; i < a ; i ++)
int main(void){
	int h[10];
	rep(i,10)cin>>h[i];
	sort(h,h+10);
	rep(i,3)cout<<h[10-i-1]<<endl;
}

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

C++: #include<iostream>
using namespace std;
main()
{ int  s=0;
  int x[10]={0,0,0,0,0,0,0,0,0,0};
  int t[3]={0,0,0};
  for(int i=0;i<10;i++){
    cin>>x[i];
  }

  for(int k=0;k<3;k++){
    for(int j=0;j<10;j++){
      if(t[k]<x[j]){
        s=t[k];
        t[k]=x[j];
        x[j]=s;
       }
     }
  }
  for(int e=0;e<3;e++){
    cout<<t[e]<<endl;
  }
return 0;
}