Go: // ダイクストラのアルゴリズム
package main

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

type color int

const (
	white color = iota // 未訪問
	mst                // MSTとして確定
)

// 頂点
type node struct {
	num     int         // 頂点の番号
	weights map[int]int // 重みMAP
	parent  *node       // MSTへの重み最小の親
	sum     int         // 始点からの距離
	color   color
}

func (p *node) getMinToMst() int {
	if p.parent == nil {
		return math.MaxInt32
	}
	return p.weights[p.parent.num]
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	n := eGetInt(scanner)

	nodes := make([]*node, n)
	for i := 0; i < n; i++ {
		weights := eAtoi((strings.Fields(eGetline(scanner))))
		v := &node{weights[0], make(map[int]int, weights[1]), nil, 0, white}
		for j := 0; j < weights[1]; j++ {
			k := weights[j*2+2] // 相手の頂点名
			w := weights[j*2+3] // 重み
			v.weights[k] = w
		}
		nodes[i] = v
	}

	// 初回はnode[0]がMSTに入るように
	nodes[0].parent = nodes[0]

	for { // 全部チェックするまで

		// どの頂点を新たにMSTに取り込むか

		var minNode *node
		min := math.MaxInt32
		for _, v := range nodes {
			if v.color == mst {
				continue
			}
			if v.getMinToMst() < min {
				min = v.getMinToMst()
				minNode = v
			}
		}
		if minNode == nil {
			// すべて完了している.
			break
		}

		// MSTに追加する頂点決定
		minNode.color = mst
		// 自分の親の合計値と合算する
		minNode.sum = minNode.parent.sum + min

		// MSTに属していない頂点それぞれについて,MSTとの最小の重みの距離を加算
		for _, v := range nodes {
			if v.color == mst {
				continue
			}
			w, ok := v.weights[minNode.num]
			if !ok {
				// minNodeと接してない
				continue
			}

			if w < v.getMinToMst() {
				// minNodeへの距離がもっとも重みが少ないので親を変更
				v.parent = minNode
			}
		}
	}

	for i, v := range nodes {
		fmt.Printf("%d %d\n", i, v.sum)
	}
}

func eGetInt(scanner *bufio.Scanner) int {
	t := eAtoi(strings.Fields(eGetline(scanner)))
	return t[0]
}

func eGetline(p *bufio.Scanner) string {
	if !p.Scan() {
		if err := p.Err(); err != nil {
			log.Fatal(err.Error())
		}
		return ""
	}
	return p.Text()
}

func eAtoi(s []string) []int {
	ints := make([]int, len(s))
	var err error
	for i, e := range s {
		ints[i], err = strconv.Atoi(e)
		if err != nil {
			log.Fatal(err.Error())
		}
	}
	return ints
}

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

const int N=100;
const int INF=2000000000;
const int WHITE=0;
const int GRAY=1;
const int BLACK=2;

int n,M[N][N],d[N],color[N];

void dijkstra(){
    d[0]=0;
    color[0]=GRAY;
    while(true){
        int min_des=INF;
        int vertex=-1;
        for(int i=0;i<n;i++){
            if(min_des>d[i]&&color[i]==GRAY){
                min_des=d[i];
                vertex=i;
            }
        }
        if(vertex==-1) break;
        color[vertex]=BLACK;
        for(int i=0;i<n;i++){
            if(color[i]!=BLACK&&M[vertex][i]<INF){
                if(d[i]>d[vertex]+M[vertex][i]){
                    d[i]=d[vertex]+M[vertex][i];
                    color[i]=GRAY;
                }
            }
        }
    }
}        

int main(){
    int u,k,v,c;
    cin>>n;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            M[i][j]=INF;
        }
        d[i]=INF;
        color[i]=WHITE;
    }
    for(int i=0;i<n;i++){
        cin>>u>>k;
        for(int j=0;j<k;j++){
            cin>>v>>c;
            M[u][v]=c;
        }
    }

    dijkstra();

    for(int u=0;u<n;u++){
        cout<<u<<' '<<d[u]<<endl;
    }
}

C++: #include <iostream>
using namespace std;
static const int MAX = 100;
static const int INFTY = (1 << 21);
static const int WHITE = 0;
static const int GRAY = 1;
static const int BLACK = 2;
int n, M[MAX][MAX];

void dijkstra(int s)
{
    int u, minv;
    int color[MAX], d[MAX], p[MAX];
    for (int i = 0; i != n; ++i)
    {
        color[i] = WHITE;
        d[i] = INFTY;
        p[i] = -1;
    }
    d[s] = 0;
    while (true)
    {
        minv = INFTY;
        for (int i = 0; i != n; ++i)
        {
            if (color[i] != BLACK && d[i] < minv)
            {
                u = i;
                minv = d[i];
            }
        }
        if (minv == INFTY)
        {
            break;
        }
        color[u] = BLACK;
        for (int v = 0; v != n; ++v)
        {
            if (M[u][v] != INFTY && color[v] != BLACK)
            {
                if (d[u] + M[u][v] < d[v])
                {
                    d[v] = d[u] + M[u][v];
                    color[v] = GRAY;
                    p[v] = u;
                }
            }
        }
    }
    for (int i = 0; i != n; ++i)
    {
        cout << i << " " << d[i] << endl;
    }
}

int main()
{
    int u, k, v, c;
    cin >> n;
    for (int i = 0; i != n; ++i)
    {
        for (int j = 0; j != n; ++j)
        {
            M[i][j] = INFTY;
        }
    }
    for (int i = 0; i != n; ++i)
    {
        cin >> u >> k;
        for (int j = 0; j != k; ++j)
        {
            cin >> v >> c;
            M[u][v] = c;
        }
    }
    dijkstra(0);
    return 0;
}

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

template<typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val) {
  std::fill((T*)array, (T*)(array + N), val);
}

const int INF = (1 << 21);

int n;
int m[100][100];

void dijikstra()
{
  int minv;
  int d[100], color[100];

  fill(d, d + 100, INF);
  fill(color, color + 100, 0);

  d[0] = 0;
  color[0] = 1;
  while (true) {
    minv = INF;
    int u = -1;
    for (int i = 0; i < n; i++) {
      if (minv > d[i] && color[i] != 2) {
        u = i;
        minv = d[i];
      }
    }
  
    if (u == -1) break;
    color[u] = 2;
  
    for (int v = 0; v < n; v++) {
      if (color[v] != 2 && m[u][v] != INF) {
        if (d[v] > d[u] + m[u][v]) {
          d[v] = d[u] + m[u][v];
          color[v] = 1;
        }
      }
    }
  }
  
  for (int i = 0; i < n; i++) {
    cout << i << " " << (d[i] == INF ? -1 : d[i]) << endl;
  }
}

signed main()
{
  int k, u, v, c;

  Fill(m, INF);

  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> u >> k;
    for (int j = 0; j < k; j++) {
      cin >> v >> c;
      m[u][v] = c;
    } 
  }

  dijikstra();

  return (0);
}

C++: #include <cstdio>
static const int INFTY = (1 << 21);
static const int WHITE = 0;
static const int GRAY = 1;
static const int BLACK = 2;

int n, **M;
int *d, *p;

void dijkstra() {
    int u, minv;
    int d[n], p[n], color[n];

    for (int i = 0; i < n; i++) {
        d[i] = INFTY;
        p[i] = -1;
        color[n] = WHITE;
    }
    d[0] = 0;

    while (1) {
        u = -1;
        minv = INFTY;
        for (int i = 0; i < n; i++) {
            if (color[i] != BLACK && d[i] < minv) {
                u = i;
                minv = d[i];
            }
        }

        if (u == -1) { break; }

        color[u] = BLACK;
        for (int v = 0; v < n; v++) {
            if (color[v] != BLACK && M[u][v] != INFTY) {
                // printf("d[%d] = %d, M[%d][%d] = %d, d[%d] = %d\n", u, d[u], u, v, M[u][v], v, d[v]);
                if (d[u] + M[u][v] < d[v]) {
                    p[v] = u;
                    d[v] = d[u] + M[u][v];
                    color[v] = GRAY;
                }             
            }
        }
    }
    
    for (int i = 0; i < n; i++) {
        printf("%d %d\n", i, d[i]);
    }
}

int main() {
    scanf("%d", &n);

    M = new int*[n];
    for (int i = 0; i < n; i++) {
        M[i] = new int[n];
        for (int j = 0; j < n; j++) {
            M[i][j] = INFTY;
        }
    }

    for (int i = 0; i < n; i++) {
        int u, k;
        scanf("%d %d", &u, &k);
        for (int j = 0; j < k; j++) {
            int v, c;
            scanf("%d %d", &v, &c);
            M[u][v] = c;
            printf("");
        }
    }

    dijkstra();

    return 0;
}