Go: package main

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

type Node struct {
	Id int
	Dis int
}

type PriorityQueue []*Node

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

func (pq PriorityQueue) Less(i, j int) bool {
	return pq[i].Dis < pq[j].Dis
}

func (pq PriorityQueue) Swap(i, j int) {
	pq[i], pq[j] = pq[j], pq[i]
}

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

func (pq *PriorityQueue) Pop() interface{} {
	n := len(*pq)
	pop := (*pq)[n-1]
	*pq = (*pq)[0:n-1]
	return pop
}

func main() {
	var n int
	fmt.Scan(&n)

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

	g := make([][]int, n)
	c := make([][]int, n)
	pq := make(PriorityQueue, 0, n)
	d := make([]int, n)
	for i := 0; i < n; i++ {
		sc.Scan()
		u, _ := strconv.Atoi(sc.Text())
		sc.Scan()
		k, _ := strconv.Atoi(sc.Text())
		g[u] = make([]int, k)
		c[u] = make([]int, k)
		for j := 0; j < k; j++ {
			sc.Scan()
			g[u][j], _ = strconv.Atoi(sc.Text())
			sc.Scan()
			c[u][j], _ = strconv.Atoi(sc.Text())
		}

		if u == 0 {
			d[u] = 0
		} else {
			d[u] = 1 << 30
		}
		pq.Push(&Node{u, d[u]})
	}
	heap.Init(&pq)

	for pq.Len() > 0 {
		node := heap.Pop(&pq).(*Node)
		for i := 0; i < len(g[node.Id]); i++ {
			nextId := g[node.Id][i]
			nextDis := node.Dis + c[node.Id][i]
			if nextDis < d[nextId] {
				d[nextId] = nextDis
				heap.Push(&pq, &Node{nextId, nextDis})
			}
		}
	}

	wr := bufio.NewWriter(os.Stdout)
	for i := 0; i < n; i++ {
		wr.WriteString(strconv.Itoa(i))
		wr.WriteString(" ")
		wr.WriteString(strconv.Itoa(d[i]))
		wr.WriteString("\n")
	}
	wr.Flush()
}

Python: import heapq

n = int(input())

INF = 2147483647
G = [[] for i in range(n)]
check, dist = [0 for i in range(n)], [INF for i in range(n)]


def dijkstra(s):
    dist[s], pq = 0, []
    heapq.heappush(pq, (0, s))

    while len(pq) != 0:
        u = heapq.heappop(pq)
        check[u[1]] = 2

        if dist[u[1]] < u[0]:
            continue

        for v in G[u[1]]:
            if check[v[0]] != 2:
                if dist[u[1]] + v[1] < dist[v[0]]:
                    dist[v[0]], check[v[0]] = dist[u[1]] + v[1], 1
                    heapq.heappush(pq, (dist[v[0]], v[0]))


def main():
    for i in range(n):
        data = list(map(int, input().split()))
        for j in range(data[1]):
            G[data[0]].append((data[2*(j+1)], data[2*(j+1)+1]))

    dijkstra(0)

    for i in range(n):
        print(i, dist[i])


if __name__ == '__main__':
    main()

Python: #coding: utf-8

inf = 1000000000


def dijkstra(s):
    d = [inf for i in range(n)]
    color = ["white" for i in range(n)]
    p = [-1 for i in range(n)]
    d[s] = 0

    while True:
        mincost = inf
        for i in range(n):
            if color[i] != "black" and d[i] < mincost:
                mincost = d[i]
                u = i
        if mincost == inf:
            break

        color[u] = "black"

        for v in range(n):
            if color[v] != "black" and mtrx[u][v] != False:
                if d[u] + mtrx[u][v] < d[v]:
                    d[v] = d[u] + mtrx[u][v]
                    p[v] = u
                    color[v] = "gray"
    return d

n = int(input())
mtrx = [[False for j in range(n)] for i in range(n)]
for i in range(n):
    data = list(map(int,input().split()))
    k = data[1]
    for num in range(k):
        mtrx[i][data[2+2*num]] = data[2+2*num+1]

d = dijkstra(0)

for i, num in enumerate(d):
    print(i,num)

Python: import queue

INFTY = 1 << 21
WHITE = 0
GRAY = 1
BLACK = 2

def dijkstra(n, adj):
    pq = queue.PriorityQueue()
    d = [INFTY] * n
    color = [WHITE] * n

    d[0] = 0
    pq.put((0, 0))
    color[0] == GRAY

    while not pq.empty():
        f = pq.get()
        u = f[1]
        color[u] = BLACK

        if d[u] < f[0]:
            continue

        for j in range(len(adj[u])):
            v = adj[u][j][0]
            if color[v] == BLACK:
                continue
            if d[v] > d[u] + adj[u][j][1]:
                d[v] = d[u] + adj[u][j][1]
                pq.put((d[v], v))
                color[v] = GRAY

    for i in range(n):
        out = d[i]
        if out == INFTY:
            out = -1
        print('{0} {1}'.format(i, out))


n = int(input())
adj = [[] for i in range(n)]
for i in range(n):
    line = [int(v) for v in input().split()]
    u = line[0]
    k = line[1]
    for j in range(k):
        v = line[2*j + 2]
        c = line[2*j + 3]
        adj[u].append((v, c))

dijkstra(n, adj)

Python: import sys

def dijkstra(v_count: int, edges: list, start: int,
             *, adj_matrix: bool = False, unreachable=float("inf")) -> list:
    """ ダイクストラ法
    :param v_count: 頂点数
    :param edges: 辺のリスト(隣接リストor隣接行列)
    :param start: スタートする頂点
    :param adj_matrix: edgesに渡したリストが隣接行列ならTrue
    :param unreachable: 到達不能を表すコスト値
                        隣接行列の辺の有無の判定および返すリストの初期値に使用
    """
    from heapq import heappush, heappop

    vertices = [unreachable] * v_count
    vertices[start] = 0
    q, rem = [(0, start)], v_count - 1

    while q and rem:
        cost, v = heappop(q)
        if vertices[v] < cost:
            continue
        rem -= 1

        dests = (filter(lambda x: x[1] != unreachable, enumerate(edges[v]))
                 if adj_matrix else edges[v])

        for dest, _cost in dests:
            newcost = cost + _cost
            if vertices[dest] > newcost:
                vertices[dest] = newcost
                heappush(q, (newcost, dest))

    return vertices

n = int(input())
inf = float("inf")
edges = [[inf]*n for _ in [0]*n]
for a in (tuple(map(int, l.split())) for l in sys.stdin):
    _from = a[0]
    for to, cost in zip(a[2::2], a[3::2]):
        edges[_from][to] = cost
vertices = dijkstra(n, edges, 0, adj_matrix=True)
for i, n in enumerate(vertices):
    print(i, n)