Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

const INF = 0x7FFFFFFF

func main() {
	for scanner.Scan() {
		n, _ := strconv.Atoi(scanner.Text())
		if n == 0 {
			break
		}
		matrix := make([][]int, 10)
		for i := range matrix {
			matrix[i] = make([]int, 10)
		}
		for i := range matrix {
			for j := range matrix[i] {
				if i == j {
					matrix[i][j] = 0
				} else {
					matrix[i][j] = INF
				}
			}
		}
		num := 0
		for i := 0; i < n; i++ {
			scanner.Scan()
			buf := strings.Split(scanner.Text(), " ")
			from, _ := strconv.Atoi(buf[0])
			to, _ := strconv.Atoi(buf[1])
			cost, _ := strconv.Atoi(buf[2])
			if num < from {
				num = from
			}
			if num < to {
				num = to
			}
			matrix[from][to] = cost
			matrix[to][from] = cost
		}
		num++
		for i := 0; i < num; i++ {
			for j := 0; j < num; j++ {
				for k := 0; k < num; k++ {
					if matrix[j][i]+matrix[i][k] < matrix[j][k] {
						matrix[j][k] = matrix[j][i]+matrix[i][k]
					}
				}
			}
		}
		ans, sum := 0, INF
		for i := 0; i < num; i++ {
			now := 0
			for j := 0; j < num; j++ {
				now += matrix[i][j]
			}
			if sum > now {
				sum = now
				ans = i
			}
		}
		fmt.Println(ans, sum)
	}
}

C++: #include <cstdio>
#include <queue>
#include <string>
#include <set>
#include <map>
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
#include <bitset>
#include <cmath>
#include <algorithm>
#include <functional>
#include <string.h>
using namespace std;
const int INF = 1000000000;
typedef long long ll;
typedef pair<int, int> P;
#define rep(i,start,end) for(int i=(start);i<(end);++i)
#define pint(i) printf("%d\n",(i))
#define pint2(i,j) printf("%d %d\n",(i),(j))
#define pint3(i,j,k) printf("%d %d %d\n",(i),(j),(k))
#define gint(i) scanf("%d",&(i))
#define gint2(i,j) scanf("%d %d",&(i),&(j))
#define gint3(i,j,k) scanf("%d %d %d",&(i),&(j),&(k))
#define init(tar,val) memset((tar),(val),sizeof((tar)))
#define show(tar,len) for(int i=0;i<(len);++i) \
	cout<<tar[i]<<' ';\
	cout<<endl;




class bignum{
public:
	bignum(int size = 4) :len(size){
	}
	~bignum(){
	}
	int size()const{
		return len;
	}
	//int get(int id)const{
	//	return num[id];
	//}
	friend ostream &operator<<(ostream &output, const bignum &b){
		bool stu = false;
		for (int i = int(b.len - 1); i >= 0; --i){
			if (stu)
				printf("%09d", b.num[i]);
			else if (b.num[i] > 0){
				printf("%d", b.num[i]);
				stu = true;
			}
		}
		if (stu == false)
			printf("0");
		return output;
	}
	const bignum& operator+=(const bignum&right){
		int add = 0;
		for (int i = 0; i < len; ++i){
			int tmp = 0;
			if (i < right.size()){
				tmp = right.num[i] + num[i] + add;
			}
			else{
				tmp = num[i] + add;
			}
			num[i] = tmp%gap;
			add = tmp / gap;
		}
		return *this;
	}
	const bignum& operator=(const bignum&right){
		for (int i = 0; i < len; ++i){
			num[i] = right.num[i];
		}
		return *this;
	}
	void set(int a){
		for (int i = 0; i < len; ++i){
			num[i] = a%gap;
			a /= gap;
		}
	}
private:
	int  num[4];
	int len;
	static const int gap = 1000000000;
};


//inline int id(int i){
//	return i & 1;
//}
//
//inline int last(int i){
//	return (i - 1) & 1;
//}
//
//void myshow(int i){
//	rep(j, 0, ){
//		cout << dp[id(i)][j] << ' ';
//	}
//	cout << endl;
//}


#define my_debug

const int MAX_NUM = 15;

int n;
int len[MAX_NUM][MAX_NUM];
int stu[MAX_NUM];
set<int> cache;
void myinit(){
	rep(i, 0, MAX_NUM)
		rep(j, 0, MAX_NUM){
		if (i == j)
			len[i][j] = 0;
		else
			len[i][j] = INF;
	}
}


void solve(){
	rep(i, 0, MAX_NUM){
		rep(j, 0, MAX_NUM){
			rep(k, 0, MAX_NUM){
				len[i][j] = min(len[i][j], len[i][k] + len[k][j]);
			}
		}
	}
	int out = INF, t = 0;
	for (int i : cache){
		int tmp = 0;
		for (int j : cache){
			tmp += len[i][j];
		}
		if (tmp && tmp < out){
			out = tmp;
			t = i;
		}
	}
	//pint2(t, out);
	cout << t << ' ' << out << endl;
}

int main(){
#ifdef my_debug
	freopen("a.in", "r", stdin);
#endif
	while (gint(n) != EOF){
		if (n == 0)
			break;
		fill(stu, stu + MAX_NUM, INF);
		myinit();
		cache.clear();
		int tmp1, tmp2;
		rep(i, 0, n){
			gint2(tmp1, tmp2);
			int tmp;
			gint(tmp);
			len[tmp2][tmp1] = len[tmp1][tmp2] = tmp;
			cache.insert(tmp1);
			cache.insert(tmp2);
		}
		solve();
	}
	return 0;
}

C++: #include <stdio.h>

#define TEST 0
int weakdist(int tc[10][10],int town,int from,int to)
{
    if(from ==to)
        return 0;
    if(tc[from][to] >= 0)
        return tc[from][to];
    return -1;
}

int dist(int tc[10][10],int town,int from,int to)
{
    if(from ==to)
        return 0;
    if(tc[from][to] >= 0)
        return tc[from][to];
    int mindist=-1;
    for(int via=0;via<town;via++)
    {
        if(via == from || via ==to)
            continue;
        if(tc[from][via] == -1 || tc[via][to]==-1)
            continue;
        int sumdist=dist(tc,town,from,via)
        +dist(tc,town,via,to);
        if(mindist < 0 || mindist > sumdist)
            mindist=sumdist;
    }
    tc[from][to]=mindist;
    tc[to][from]=mindist;
    return mindist;
}
void dump(int tc[10][10])
{
    
        for(int i=0;i<10;i++)
        {
            for(int j=0;j<10;j++)
            {
                printf("%d ",tc[i][j]);
            }
            puts("");
        }
}

int main(void)
{
    int n;
    int tc[10][10];//connections between towns
    while(scanf("%d",&n) == 1 && n != 0)
    {
        int town=0;
        for(int i=0;i<10;i++)
        {
            for(int j=0;j<10;j++)
            {
                tc[i][j]=-1;
            }
            tc[i][i]=0;
        }
        for(int k=0;k<n;k++)
        {
            int a,b,c;
            scanf("%d%d%d",&a,&b,&c);
            if(a==b)
                continue;
            tc[a][b]=c;
            tc[b][a]=c;
            if(town <a+1)town=a+1;
            if(town <b+1)town=b+1;
        }
#if TEST
        printf("town.num=%d\n",town);
#endif
        int minsum=-1;
        int minnum=-1;
        for(int cnt=0;cnt <10000;cnt++)
        {
            for(int i=0;i<town;i++)
            {   
                for(int j=0;j<town;j++)
                {
                    dist(tc,town,i,j);
                }
            }
        }//try calculating for setting the map.
        for(int i=0;i<town;i++)
        {
            int sum=0;
            for(int j=0;j<town;j++)
            {
                sum+=dist(tc,town,i,j);
            }
            if(minsum<0 || minsum >sum)
            {
                minsum=sum;
                minnum=i;
            }
        }
#if TEST
        dump(tc);
#endif
        printf("%d %d\n",minnum,minsum);
    }
    return 0;

}