Go: package main

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

const NIL = -1

type Node struct {
	id     int
	weight int
}

func init() {
	sc.Split(bufio.ScanWords)
}

type NodeHeap []Node

func (h NodeHeap) Len() int           { return len(h) }
func (h NodeHeap) Less(i, j int) bool { return h[i].weight < h[j].weight }
func (h NodeHeap) Swap(i, j int)      { h[i], h[j] = h[j], h[i] }

func (h *NodeHeap) Push(x interface{}) {
	*h = append(*h, x.(Node))
}

func (h *NodeHeap) Pop() interface{} {
	old := *h
	n := len(old)
	x := old[n-1]
	*h = old[0 : n-1]
	return x
}

var sc = bufio.NewScanner(os.Stdin)

func scanInt() int {
	num, _ := strconv.Atoi(scanString())
	return num
}

func scanString() string {
	sc.Scan()
	return sc.Text()
}

func init() {
	sc.Split(bufio.ScanWords)
}

func main() {
	n := scanInt()

	route := make([][]Node, n)
	weight := make([]int, n)
	for i := 0; i < n; i++ {
		weight[i] = NIL
	}

	for i := 0; i < n; i++ {
		u := scanInt()
		k := scanInt()
		route[i] = make([]Node, k)
		for j := 0; j < k; j++ {
			route[u][j] = Node{id: scanInt(), weight: scanInt()}
		}
	}

	start := Node{id: 0, weight: 0}
	h := &NodeHeap{start}
	heap.Init(h)

	for h.Len() > 0 {
		node := heap.Pop(h).(Node)
		if weight[node.id] != NIL {
			continue
		}
		weight[node.id] = node.weight

		for _, nextNode := range route[node.id] {
			if weight[nextNode.id] != NIL {
				continue
			}
			nextNode.weight += node.weight
			heap.Push(h, nextNode)
		}
	}

	for i, w := range weight {
		fmt.Println(i, w)
	}
}

C++: #include<iostream>
#include<algorithm>
#include<queue>
using namespace std;
static const int MAX=10000;
static const int I=(1<<20);
static const int W=0;
static const int G=1;
static const int B=2;

int n;
vector<pair<int,int> > adj[MAX];

void di(){
  priority_queue<pair<int,int> > PQ;
  int color[MAX];
  int d[MAX];
  for(int i=0;i<n;i++){
    d[i]=I;
    color[i]=W;
  }


  d[0]=0;
  PQ.push(make_pair(0,0));
  color[0]=G;

  while(!PQ.empty()){
    pair<int,int> f=PQ.top(); PQ.pop();
    int u=f.second;
    color[u]=B;

    if(d[u] < f.first*(-1)) continue;

    for(int j=0;j<adj[u].size();j++){
      int v = adj[u][j].first;
      if(color[v]==B) continue;
      if(d[v]>d[u]+adj[u][j].second){
        d[v]=d[u]+adj[u][j].second;
        PQ.push(make_pair(d[v]*(-1),v));
        color[v]=G;
      }
    }
  }


  for(int i=0;i<n;i++){
    cout << i << " " << (d[i]==I?-1:d[i]) << endl;
  }
}


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

  cin >> n;
  for(int i=0;i<n;i++){
    cin >> u >>k;
    for(int j=0;j<k;j++){
      cin >> v >> c;
      adj[u].push_back(make_pair(v,c));
    }
  }

  di();

  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
//template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

const int INF = 1<<20;

int n;
vector<pair<int, int>> adj[10005];


void dijkstra(){
    priority_queue<pair<int, int>> PQ;
    bool visited[n];
    int d[n];

    for(int i=0; i<n; i++){
        visited[i] = false;
        d[i] = INF;
    }

    PQ.push({0, 0});
    d[0] = 0;

    while(!PQ.empty()){

        pair<int, int> p = PQ.top(); PQ.pop();
        int u = p.second;

        visited[u] = true;

        if(d[u] < p.first * (-1)) continue;
        
        for(int i=0; i<adj[u].size(); i++){
            int v = adj[u][i].first;
            if(visited[v] == false && d[v] > d[u] + adj[u][i].second){
                d[v] = d[u] + adj[u][i].second;
                PQ.push({d[v] * (-1), v});
            }
        }
    }

    for(int i=0; i<n; i++){
        printf("%d %d\n", i, d[i]);
    }

}

int main(void){
    cin >> n;
    for(int i=0; i<n; i++){
        int u, k; cin >> u >> k;
        for(int j=0; j<k; j++){
            int v, c; cin >> v >> c;
            adj[u].push_back(make_pair(v, c));
        }
    }

    dijkstra();
}

C++: #include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <utility>
#include <numeric>
#include <array>
#include <cmath>
#include <memory>
#include <queue>
using namespace std;
//変数デバッグ
#define DEB(variable) cout << #variable << '=' << variable << endl

//for簡易表記(引数ミス防止)
#define FOR(LoopVariable,numberOFbegin,numberOFend) for (int LoopVariable = (numberOFbegin); (LoopVariable) < (numberOFend); (LoopVariable)++)
#define DEFOR(LoopVariable,numberOFbegin,numberOFend) for (int LoopVariable = (numberOFbegin)-1; (LoopVariable) >= (numberOFend); (LoopVariable)--)
#define REP(LoopVariable,numberOFend) for(int LoopVariable = 0;(LoopVariable)<(numberOFend);LoopVariable++)

constexpr long long int linf = numeric_limits<long long int>::max()-5;
constexpr int inf= numeric_limits<int>::max()-5;
constexpr long long int mod = 1000000007;

template <typename T>
class Wgraph{
public:
    Wgraph(int _n){
        n = _n;
        node.resize(n);
        adj.resize(n);
        REP(i, n) { node[i] = i; }
    }
    ~Wgraph(){

    }

    //a → b
    void connect(T from,T to,int cost){
        adj[from].push_back(make_pair(to,cost));
        //cout << from<<" " << to<<" "<<cost<<endl;
    }

    void dij(int start){
        
        priority_queue<pair<T,T>,vector<pair<T,T>>,greater<pair<T,T>>> pq;
        vector<T> dist(n,numeric_limits<T>::max());
        vector<bool> is_used(n,false);

        pq.push(make_pair(0,start));
        T to,d;

        while(!pq.empty()){
            tie(d,to) = pq.top();
            pq.pop();
            if(is_used[to]){
                continue;
            }else{
                is_used[to] = true;
                dist[to] = d;
                for(auto x:adj[to]){
                    //if(dist[x.first]>d+x.second){
                        pq.push(make_pair(d+x.second,x.first));
                    //}
                }
            }

        }
        REP(i,n){
            printf("%d %d\n", i, dist[i]);
        }
    }

  private:
    int n;
    vector<T> node;
    vector<vector<pair<T, T>>> adj;
    
};

int main(){
    int n;
    cin >> n;
    unique_ptr<Wgraph<int>> wg(new Wgraph<int>(n));

    
    {
        int tmp_from,tmp_edgenum, tmp_to,tmp_cost;

        REP(i,n){
            
            scanf("%d %d,", &tmp_from,&tmp_edgenum);

            REP(j,tmp_edgenum){
                scanf("%d %d", &tmp_to, &tmp_cost);
                wg->connect(tmp_from, tmp_to, tmp_cost);
            }


        }
    }
    wg->dij(0);

    return 0;
}