Go: package main

import (
	"bufio"
	"container/heap"
	"fmt"
	"os"
)

type Item struct {
	value    int // The value of the item; arbitrary.
	priority int // The priority of the item in the queue.
	// The index is needed by update and is maintained by the heap.Interface methods.
	index int // The index of the item in the heap.
}
type PriorityQueue []*Item

func (pq PriorityQueue) Len() int { return len(pq) }
func (pq PriorityQueue) Less(i, j int) bool {
	return pq[i].priority < pq[j].priority
}
func (pq PriorityQueue) Swap(i, j int) {
	pq[i], pq[j] = pq[j], pq[i]
	pq[i].index = i
	pq[j].index = j
}
func (pq *PriorityQueue) Push(x interface{}) {
	n := len(*pq)
	item := x.(*Item)
	item.index = n
	*pq = append(*pq, item)
}
func (pq *PriorityQueue) Pop() interface{} {
	old := *pq
	n := len(old)
	item := old[n-1]
	item.index = -1 // for safety
	*pq = old[0 : n-1]
	return item
}

type Q struct {
	pq *PriorityQueue
	ds map[int]int // It has always same value as pq. For random access.
}

func newQ() *Q {
	pq := new(PriorityQueue)
	heap.Init(pq)
	return &Q{
		pq: pq,
		ds: make(map[int]int),
	}
}
func (q *Q) pop() (u, d int) {
	item := heap.Pop(q.pq).(*Item)
	delete(q.ds, item.value)
	return item.value, item.priority
}
func (q *Q) get(u int) (int, bool) { // returns d
	d, ok := q.ds[u]
	return d, ok
}
func (q *Q) set(u, d int) {
	q.ds[u] = d
	for _, item := range *q.pq {
		if item.value != u {
			continue
		}

		item.priority = d
		heap.Fix(q.pq, item.index)
		return
	}
	heap.Push(q.pq, &Item{
		priority: d,
		value:    u,
	})
}
func (q *Q) len() int {
	return len(q.ds)
}

func main() {
	r := bufio.NewReader(os.Stdin)

	var n int
	fmt.Fscan(r, &n)
	cs := make([]map[int]int, n) // []v_i -> c_i
	for h := 0; h < n; h++ {
		var u, k int
		fmt.Fscan(r, &u, &k)
		m := make(map[int]int)
		for i := 0; i < k; i++ {
			var v, c int
			fmt.Fscan(r, &v, &c)
			m[v] = c
		}

		cs[u] = m
	}

	q := newQ()
	q.set(0, 0)
	visited := make(map[int]struct{})
	out := make([]int, n)

	for q.len() > 0 {
		u, d := q.pop()
		for uu, c := range cs[u] {
			// Consider the connection between u and uu.
			if _, ok := visited[uu]; ok {
				continue
			}
			dd := d + c
			if d, ok := q.get(uu); !ok || d > dd {
				q.set(uu, dd)
			}
		}

		out[u] = d
		visited[u] = struct{}{}
	}

	for u, d := range out {
		fmt.Println(u, d)
	}
}

C++: #include <iostream>
#include <iomanip>
#include <string>
#include <stack>
#include <vector>
#include <math.h>
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <map>
#include <set>
#include <queue>
#include <list>
using namespace std;
using pii  = pair<int,int>;
using ll=long long;
using ld=long double;
#define stpr setprecision
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)
#define REP(i,a,b) for(int i=(a);i<(b);++i)
#define crep(i) for(char i='a';i<='z';++i)
#define psortsecond(A,N) sort(A,A+N,[](const pii &a, const pii &b){return a.second<b.second;});
#define ALL(x) (x).begin(),(x).end()
#define endl '\n'
int ctoi(const char c){
  if('0' <= c && c <= '9') return (c-'0');
  return -1;
}
long long gcd(long long a, long long b){return (b == 0 ? a : gcd(b, a%b));}
long long lcm(long long a, long long b){return a*b/gcd(a,b);}
constexpr ll MOD=1000000007;
constexpr ld EPS=10e-8;
template<typename T> istream& operator>>(istream& is,vector<T>& v){for(auto&& x:v)is >> x;return is;}
template<typename T,typename U> istream& operator>>(istream& is, pair<T,U>& p){ is >> p.first; is >> p.second; return is;}
template<typename T,typename U> ostream& operator>>(ostream& os, const pair<T,U>& p){ os << p.first << ' ' << p.second; return os;}
template<class T> ostream& operator<<(ostream& os, vector<T>& v){
    for(auto i=begin(v); i != end(v); ++i){
        if(i !=begin(v)) os << ' ';
        os << *i;
    }
    return os;
}

ll N,A[107][107];
ll DKSTR[107],chek[107];

void dikstra(){
    DKSTR[0]=0;
    ll C=1,key=0;
    vector<pair<ll,ll>> V;
    while(C<N){
        chek[key]=1;
        V.clear();
        rep(i,N){
            DKSTR[i]=min(DKSTR[i],DKSTR[key]+A[key][i]);
            if(chek[i]==0){
                V.pb(mp(DKSTR[i],i));
            }
        }
        sort(ALL(V));
        while(1){
            key=V[0].second;
            C++;
            break;
        }
    }
}

int main(){
    ll X,Y,a,b;
    cin>>N;
    rep(i,N+1){
        rep(j,N+1){
            A[i][j]=MOD;
        }
        DKSTR[i]=MOD;
    }
    rep(i,N){
        cin >> X >> Y;
        rep(j,Y){
            cin >> a >> b;
            A[X][a]=b;
        }
    }
    dikstra();
    rep(i,N){
        cout << i << " " << DKSTR[i] << 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 minv;
  int d[MAX], color[MAX];

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


  d[0] = 0;
  color[0] = GRAY;
  while(1) {
    minv = INFTY;
    int u = -1;
    for (int i = 0; i < n; i++) {
      if (minv > d[i] && color[i] != BLACK ) {
        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 ) {
        if (d[v] > d[u] + M[u][v] ) {
          d[v] = d[u] + M[u][v];
          color[v] = GRAY;
        }
      }
    }
  }
 for (int i = 0; i < n; i++ ){
  cout << i << " " << (d[i] == INFTY ? -1 : d[i] ) << endl;
 }
}

int main() {
  cin >> n;
  for (int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++ ){
      M[i][j] = INFTY;
    }
  }

  int k, c, u, v;
  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();

  return 0;
}

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

#define N 100
#define INFTY 10000001
#define WHITE 0
#define GRAY 1
#define BLACK 2

void dijkstra(int n, int d[], int M[N][N]) {
  int i, vertex, min_d, color[N];
  // 初期状態
  for (i = 0; i < n; i++) {
    d[i] = INFTY;
    color[i] = WHITE;
  }
  d[0] = 0;
  color[0] = GRAY;

  while (1) {
    // S - V でコスト最小の頂点を選ぶ
    vertex = -1;
    min_d = INFTY;
    for (i = 0; i < n; i++) {
      if (color[i] == GRAY && d[i] < min_d) {
        min_d = d[i];
        vertex = i;
      }
    }
    // S = V の場合は終了
    if (vertex == -1) break;

    // vertexをSに追加
    color[vertex] = BLACK;

    // S-Vに属し、vertexに隣接する頂点のコストを更新
    for (i = 0; i < n; i++) {
      if (color[i] != BLACK && M[vertex][i] < INFTY) {
        color[i] = GRAY;
        if (d[i] > d[vertex] + M[vertex][i]) {
          d[i] = d[vertex] + M[vertex][i];
        }
      }
    }
  }
}

int main() {
  int i, j, n, u, k, v, c, d[N], M[N][N];

  cin >> n;
  // 隣接行列を作る
  for (i = 0; i < n; i++) {
    for (j = 0; j < n; j++) {
      M[i][j] = INFTY;
    }
  }
  for (i = 0; i < n; i++) {
    cin >> u >> k;
    for (j = 0; j < k; j++) {
      cin >> v >> c;
      M[u][v] = c;
    }
  }

  dijkstra(n, d, M);

  for (i = 0; i < n; i++) cout << i << " " << d[i] << endl;    

  return 0;
}