Go: package main

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

const (
	MAX_N      = 10000
	MAX_WEIGHT = 100000
)

type Edge struct {
	start  int
	end    int
	weight int
}

type ShortestInfo struct {
	edges    []Edge
	shortest int
}

func main() {
	doMain(os.Stdin)
}

func doMain(reader io.Reader) {
	sc := bufio.NewScanner(reader)
	sc.Split(bufio.ScanWords)

	n, err := nextInt(sc)
	if err != nil {
		panic(err)
	}

	shortestList := make([]ShortestInfo, n)
	for i := 1; i < n; i++ {
		shortestList[i] = ShortestInfo{edges: []Edge{}, shortest: MAX_N*MAX_WEIGHT + 1}
	}

	adjacentMatrix, err := createAdjacentMatrix(n, sc)
	if err != nil {
		panic(err)
	}

	sssp([]int{0}, shortestList, adjacentMatrix)
	for _, v := range shortestList {
		fmt.Println(v.getEnd(), v.shortest)
	}
}

func (si ShortestInfo) getEnd() int {
	if len(si.edges) == 0 {
		return 0
	} else {
		return si.edges[len(si.edges)-1].end
	}
}

func createAdjacentMatrix(n int, sc *bufio.Scanner) ([][]int, error) {
	adjacentMatrix := make([][]int, n)
	for i := 0; i < n; i++ {
		id, err := nextInt(sc)
		if err != nil {
			return nil, err
		}
		adjacentMatrix[id] = make([]int, n)
		for j := 0; j < n; j++ {
			adjacentMatrix[id][j] = -1
		}
		vertexNum, err := nextInt(sc)
		if err != nil {
			return nil, err
		}
		for j := 0; j < vertexNum; j++ {
			v, err := nextInt(sc)
			if err != nil {
				return nil, err
			}
			c, err := nextInt(sc)
			if err != nil {
				return nil, err
			}
			adjacentMatrix[id][v] = c
		}
	}
	return adjacentMatrix, nil
}

func sssp(nodeStack []int, shortestList []ShortestInfo, adjacentMatrix [][]int) {
	for len(nodeStack) > 0 {
		currentNode := nodeStack[0]
		nodeStack = nodeStack[1:]
		currentShortest := getShortest(currentNode, shortestList)
		adjacents := findAdjacents(currentNode, adjacentMatrix)
		for i := 0; i < len(adjacents); i++ {
			adj := adjacents[i]
			if currentShortest.shortest+adj.weight < getShortest(adj.end, shortestList).shortest {
				setShortest(adj.end, adj, currentShortest, shortestList)
				nodeStack = append(nodeStack, adj.end)
			}
		}
	}
}

func getShortest(node int, shortestList []ShortestInfo) ShortestInfo {
	return shortestList[node]
}

func setShortest(node int, edge Edge, currentShortest ShortestInfo, shortestList []ShortestInfo) {
	newEdges := make([]Edge, len(currentShortest.edges)+1)
	for i := 0; i < len(newEdges)-1; i++ {
		newEdges[i] = currentShortest.edges[i]
	}
	newEdges[len(newEdges)-1] = edge
	shortestInfo := ShortestInfo{edges: newEdges, shortest: currentShortest.shortest + edge.weight}
	shortestList[node] = shortestInfo
}

func findAdjacents(currentNode int, adjacentMatrix [][]int) []Edge {
	adjacents := adjacentMatrix[currentNode]
	edges := []Edge{}
	for i, v := range adjacents {
		if v >= 0 {
			edges = append(edges, Edge{start: currentNode, end: i, weight: v})
		}
	}
	return edges
}

func nextInt(sc *bufio.Scanner) (int, error) {
	sc.Scan()
	return strconv.Atoi(sc.Text())
}

C++: #include <bits/stdc++.h>
using namespace std;
#define MAX_N 10000

typedef pair<long, long> P;

long N, d[MAX_N];
vector<P> edge[MAX_N];

void dijkstra(){
    bool seen[N];
    fill(seen, seen + N, false);
    priority_queue<P, vector<P>, greater<P> > todo;
    todo.push(P(0, 0));
    
    while(!todo.empty()){
        long dist = todo.top().first, v = todo.top().second;
        todo.pop();
        if(seen[v]) continue;
        d[v] = dist;
        seen[v] = true;
        for(long i = 0; i < edge[v].size(); i++){
            long w = edge[v][i].second, u = edge[v][i].first;
            if(d[v] + w < d[u]){
                d[u] = d[v] + w;
                todo.push(P(d[u], u));
            }
        }
    }
}

int main(){
    cin >> N;
    fill(d, d + MAX_N, LONG_MAX);
    for(long i = 0; i < N; i++){
        long v, k, u, c;
        cin >> v >> k;
        for(long j = 0; j < k; j++){
            cin >> u >> c;
            edge[v].push_back(P(u, c));
        }
    }
    
    dijkstra();
    
    for(long i = 0; i < N; i++)
        cout << i << " " << d[i] << endl;
    
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int INF;
int n;
vector<pair<int, int>> es[10000];

// sから各頂点への最短経路を求める
void dijkstra () {
  
  priority_queue<pair<int, int>> pq;
  int d[10000];

  // 0:未調査 1:調査中 2:調査完了
  int status[10000];

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

  d[0] = 0;
  status[0] = 1;
  pq.push(make_pair(0,0));

  while (!pq.empty()) {

    pair<int, int> p = pq.top(); pq.pop();
    int u = p.second;
    status[u] = 2;

    // 最小値を取り出し、それが最短でなければ無視
    if (d[u] < p.first * (-1)) {
      continue;
    }
    
    for (int i = 0; i < es[u].size(); i++) {
      int v = es[u][i].first;
      if (status[v] == 2) {
        continue;
      }
      if (d[u] + es[u][i].second < d[v]) {
        d[v] = d[u] + es[u][i].second;
        // priority_queueはデフォルトで大きい順を優先するため-1を掛ける
        pq.push(make_pair(d[v] * (-1), v));
        status[v] = 1;
      }
    }
    
  }
  for (int i = 0; i < n; i++) {
    if (d[i] == INF) {
      cout << i << " -1" << endl;
    } else {
      cout << i << " " << d[i] << endl;
    } 
  }
}

int main() {
  
  cin >> n;

  INF = 20000000;

  // 入力を受け取る
  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;
      es[u].push_back(make_pair(v,c));
    }
  }

  // ダイクストラ法開始
  dijkstra();

  return 0;
}

C++: #include <algorithm>
#include <iostream>
#include <queue>
#include <vector>
using namespace std;
static const int NMAX = 10000;
#define INF (1 << 30)

int main() {
  int n;
  cin >> n;
  vector<pair<int, int>> adj[NMAX];

  for (int i = 0; i < n; i++) {
    int id, nn;
    cin >> id >> nn;
    for (int j = 0; j < nn; j++) {
      int to, weight;
      cin >> to >> weight;
      // use negative weights for priority_queue
      adj[id].push_back(make_pair(-weight, to));
    }
  }

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

  priority_queue<pair<int, int>> distQ;

  // add node 0
  for (int i = 0; i < adj[0].size(); i++) {
    distQ.push(adj[0][i]);
    int weight = adj[0][i].first;
    int id = adj[0][i].second;
    dist[id] = weight;
  }
  visited[0] = true;

  while (!distQ.empty()) {
    // find nearest node
    int minnode = distQ.top().second;
    distQ.pop();

    // add node
    visited[minnode] = true;

    // update dist
    for (int i = 0; i < adj[minnode].size(); i++) {
      int weight = adj[minnode][i].first;
      int id = adj[minnode][i].second;

      if (visited[id] == false) {
        int newWeight = dist[minnode] + weight;
        if (-newWeight < -dist[id]) {
          distQ.push(make_pair(newWeight, id));
          dist[id] = newWeight;
        }
      }
    }
  }

  dist[0] = 0;
  for (int i = 0; i < n; i++)
    cout << i << " " << -dist[i] << endl;
}