Go: package main

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

//make priority queue
type Item struct {
	id       int
	priority int // this state is priority and distans from start
	index    int
}

type PriorityQueue []*Item

func (pq PriorityQueue) Len() int { return len(pq) }

// we want the ascending-priority-queue.
// So we use less than here.
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 = j
	pq[j].index = i
}

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
}

func (pq *PriorityQueue) update(dist int, id int) {
	for _, i := range *pq {
		if i.id == id {
			if i.priority > dist {
				i.priority = dist
			}
		}
	}
}

// the main code
func nextInt(sc *bufio.Scanner) int {
	sc.Scan()
	n, _ := strconv.Atoi(sc.Text())
	return n
}

func dikstra(dist [][]int, n int) []int {
	// preparate priority queue
	inf := 1 << 30
	pq := make(PriorityQueue, n)
	shortests := make([]int, n)
	for i := 0; i < n; i++ {
		pq[i] = &Item{
			id:       i,
			priority: inf,
			index:    i,
		}

		shortests[i] = inf
	}
	pq[0].priority = 0
	shortests[0] = 0
	heap.Init(&pq)

	for pq.Len() > 0 {
		item := heap.Pop(&pq).(*Item)
		shortests[item.id] = item.priority
		for id, d := range dist[item.id] {
			if d != -1 {
				pq.update(item.priority+d, id)
			}
		}
		heap.Init(&pq)
	}
	return shortests
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)

	// init
	n := nextInt(sc)
	dist := make([][]int, n)
	for i := 0; i < n; i++ {
		dist[i] = make([]int, n)
		for j := 0; j < n; j++ {
			dist[i][j] = -1
		}
	}

	// std Input
	for i := 0; i < n; i++ {
		u := nextInt(sc)
		k := nextInt(sc)
		for j := 0; j < k; j++ {
			v, c := nextInt(sc), nextInt(sc)
			dist[u][v] = c
		}
	}

	shortests := dikstra(dist, n)
	for i, d := range shortests {
		fmt.Printf("%d %d\n", i, d)
	}
}

C++: #include <iostream>
#include <cstring> 
#include <algorithm> 
#include <vector> 
#define INF 2000000000 //??¨?????????????????¢????¶??????????????????????????????§????????°???????????¨????????????????????????
             
#define MAX_V 100
     using namespace std;
     int v,u,c,k,vertex;//number of vertices
     int d[MAX_V];
     int ver[100]={};
     int path[100][100]={};
     int path_exist[100][100];
     int min_index;
     bool used[MAX_V];
     int num_used=0,l;
     vector<int> q;
     void dijkstra(int s)
     {
             fill(d,d+v,INF);
             memset(used,false,sizeof(used));//(s,val,end)?????¢?????§s??????end?????§?????¢???????¢???????false??§?????????
             d[s]=0;
             while(q.size()-num_used != 0){
             		while(used[l]==true){
             			l++;
             		}
             		min_index=l;
                     for(int j=0;j<q.size();j++){
                     	if(!used[j]){//???????????¢????????????????¨??????????????????????????????¶
                     		if(d[min_index] > d[j]/*??´??????*/)
                     		min_index=q.at(j);
                     	}
                     }
                        used[min_index]=true;
                        num_used+=1;
                        for(int j=0;j<ver[min_index];j++){//min_index????????°????????????????????????edge????????¨??????????????????????????°
			  d[path_exist[min_index][j]]=min(d[path_exist[min_index][j]], d[min_index] + path[min_index][path_exist[min_index][j]]);/*??´??????*/
                        } 
            }
            return;
    }
    int main(){
        cin>>v;

        for(int i=0; i<v;i++){
        	cin>>u;
        	cin>>k;
        	ver[u]=k;
        	q.push_back(i);
        	for(int j=0;j< k ; j++){
        		cin>>vertex;
        		cin>>c;
        		path[u][vertex]= c;
        		path_exist[u][j]=vertex;

        	}
        }

        dijkstra(0);
        for(int i=0;i<v;i++){
        	cout<<i<<" "<<d[i]<<endl;
        }
        return 0;
    }