Go: package main

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

// I/O
type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner() *Scanner {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024), int(1e+9))
	return &Scanner{sc}
}

func (s *Scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func (s *Scanner) nextInt() int {
	i, e := strconv.Atoi(s.nextStr())
	if e != nil {
		panic(e)
	}
	return i
}

func (s *Scanner) nextFloat() float64 {
	f, e := strconv.ParseFloat(s.nextStr(), 64)
	if e != nil {
		panic(e)
	}
	return f
}

func (s *Scanner) nextRuneSlice() []rune {
	return []rune(s.nextStr())
}

func (s *Scanner) nextIntSlice(n int) []int {
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextInt()
	}
	return res
}

func (s *Scanner) nextFloatSlice(n int) []float64 {
	res := make([]float64, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextFloat()
	}
	return res
}

// Arithmetic
func max(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m < i {
			m = i
		}
	}
	return m
}

func min(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m > i {
			m = i
		}
	}
	return m
}

func abs(x int) int {
	if x > 0 {
		return x
	}
	return -x
}

func pow(x, y int) int {
	res := 1
	for i := 0; i < y; i++ {
		res *= x
	}
	return res
}

func ceil(a, b int) int {
	if a%b == 0 {
		return a / b
	} else {
		return a/b + 1
	}
}

// Sort
type RuneSlice []rune

func (a RuneSlice) Len() int           { return len(a) }
func (a RuneSlice) Less(i, j int) bool { return a[i] < a[j] }
func (a RuneSlice) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }

// Main
const INF = 1 << 60

type Edge struct {
	to, cost int
}

type Node struct {
	id, cost int
}

type PQ []Node

func (pq PQ) Len() int           { return len(pq) }
func (pq PQ) Less(i, j int) bool { return pq[i].cost < pq[j].cost }
func (pq PQ) Swap(i, j int)      { pq[i], pq[j] = pq[j], pq[i] }

func (pq *PQ) Push(x interface{}) {
	*pq = append(*pq, x.(Node))
}

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

func main() {
	sc := NewScanner()
	wtr := bufio.NewWriter(os.Stdout)
	N := sc.nextInt()
	E := make([][]Edge, N)
	for i := 0; i < N; i++ {
		id, k := sc.nextInt(), sc.nextInt()
		E[id] = make([]Edge, k)
		for j := 0; j < k; j++ {
			to, cost := sc.nextInt(), sc.nextInt()
			E[id][j] = Edge{to, cost}
		}
	}

	d := make([]int, N)
	for i := 0; i < N; i++ {
		d[i] = INF
	}
	done := make([]bool, N)
	pq := &PQ{}
	heap.Init(pq)
	d[0] = 0
	heap.Push(pq, Node{0, 0})
	for pq.Len() > 0 {
		cur := heap.Pop(pq).(Node).id
		if done[cur] {
			continue
		}
		done[cur] = true
		for i := 0; i < len(E[cur]); i++ {
			to, cost := E[cur][i].to, E[cur][i].cost+d[cur]
			if !done[to] && cost < d[to] {
				d[to] = cost
				heap.Push(pq, Node{to, cost})
			}
		}
	}

	for i := 0; i < N; i++ {
		fmt.Fprintln(wtr, i, d[i])
	}
	wtr.Flush()
}

C++: #include <iostream>
#include <limits.h>
#include <vector>

using namespace std;

struct Node {
    int cost = INT_MAX;
    int color = 0;
    vector<int> next_node;
    vector<int> len_cost;
} node[100];

int main() {
    int n, id, k;

    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> id >> k;
        node[id].next_node.resize(k);
        node[id].len_cost.resize(k);
        for (int j = 0; j < k; j++) {
            cin >> node[id].next_node[j] >> node[id].len_cost[j];
        }
    }

    int size1, size2;
    vector<int> vec;
    node[0].cost = 0;
    node[0].color = 1;
    vec.push_back(0);
    while (1) {
        size1 = vec.size();
        if (size1 == n) {
            break;
        }
        for (int i = 0; i < size1; i++) {
            size2 = node[vec[i]].next_node.size();
            for (int j = 0; j < size2; j++) {
                if (node[node[vec[i]].next_node[j]].cost > node[vec[i]].cost + node[vec[i]].len_cost[j]) {
                    node[node[vec[i]].next_node[j]].cost = node[vec[i]].cost + node[vec[i]].len_cost[j];
                }
            }
        }
        int min = INT_MAX, mini;
        for (int i = 0; i < size1; i++) {
            size2 = node[vec[i]].next_node.size();
            for (int j = 0; j < size2; j++) {
                if (min > node[node[vec[i]].next_node[j]].cost && node[node[vec[i]].next_node[j]].color == 0) {
                    min = node[node[vec[i]].next_node[j]].cost;
                    mini = node[vec[i]].next_node[j];
                }
            }
        }
        vec.push_back(mini);
        node[mini].color = 1;
    }

    for (int i = 0; i < n; i++) {
        cout << i << " " << node[i].cost << endl;
    }
    
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e18;
const int inf = 1e9;
#define rep(i, n) for (int i = 0; i < n; i++)
using Graph = vector<vector<int>>;
using pint = pair<int, int>;
int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
int dxx[8] = {1, 1, 1, 0, 0, -1, -1, -1}, dyy[8] = {-1, 0, 1, -1, 1, -1, 0, 1};

int n;
vector<vector<pint>> g (10005);

void dijkstra() {
    int d[n];
    bool seen[n] = {};
    rep (i, n) d[i] = inf;
    d[0] = 0;
    priority_queue<pint, vector<pint>, greater<pint>> pq;
    pq.push ({0, 0});

    while (!pq.empty()) {
        pint f = pq.top();
        pq.pop();
        int u = f.second; // firstはコスト,secondは場所
        seen[u] = 1;

        if (d[u] < f.first) continue;
        // cout << u << " " << d[u] << "\n";
        rep (i, g[u].size()) {
            int v = g[u][i].second;
            if (!seen[v] && d[v] > d[u] + g[u][i].first) {
                d[v] = d[u] + g[u][i].first;
                pq.push ({d[v], v});
            }
        }
    }
    rep (i, n) cout << i << " " << d[i] << "\n";
}

int main() {
    cin >> n;
    rep (i, n) {
        int now, k, v, c;
        cin >> now >> k;
        rep (j, k) {
            cin >> v >> c;
            g[now].push_back ({c, v});
        }
    }
    dijkstra();
}

C++: #include <iostream>
#include <cstdio>
#include <vector>
#include <utility>
#include <queue>
#include <functional>
#define N 101
#define INF 2000000000
using namespace std;

int dist[N];
typedef pair<int,int> pii;

std::vector<pii> e1[N];
std::vector<pii> e2[N];

int dijk1(int a,int b){
	dist[a]=0;
	std::priority_queue<pii> pq;
	for(int i=0;i<e2[a].size();i++){
		pq.push(e2[a][i]);
	}
	while(!pq.empty()){
		pii temp=pq.top();
		int now=temp.second;
		int c=temp.first;
		pq.pop();
		if(dist[now]!=INF)continue;
		dist[now]=-c;
		if(now==b)break;
		for(int i=0;i<e2[now].size();i++){
			pq.push(make_pair(c+e2[now][i].first,e2[now][i].second));
		}
	}
	return dist[b];
}

int dijk(int a,int b){
	dist[a]=0;
	std::priority_queue<pii> pq;
	for(int i=0;i<e1[a].size();i++){
		pq.push(e1[a][i]);
	}
	while(!pq.empty()){
		pii temp=pq.top();
		int now=temp.second;
		int c=temp.first;
		pq.pop();
		if(dist[now]!=INF)continue;
		dist[now]=-c;
		if(now==b)break;
		for(int i=0;i<e1[now].size();i++){
			pq.push(make_pair(c+e1[now][i].first,e1[now][i].second));
		}
	}
	return dist[b];
}

int main(void){
	int a,b,c,d;
	int n,m;
	while(cin>>n>>m,n||m){
		for(int i=0;i<n;i++){
			cin>>a>>b>>c>>d;
			e1[a].push_back(make_pair(-c,b));
			e2[a].push_back(make_pair(-d,b));
		}
		int k;
		cin>>k;
		while(k--){
			for(int i=1;i<=m;i++)dist[i]=INF;
			cin>>a>>b>>c;
			if(c) cout<<dijk1(a,b)<<endl;
			else cout<<dijk(a,b)<<endl;
			// for(int i=1;i<=m;i++)printf("dist[%d]:%d\n",i,dist[i]);
		}
	}
	return 0;
}