Go: package main

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

const (
	MAX_N      = 100
	MAX_WEIGHT = 100000
)

type Edge struct {
	start  int
	end    int
	weight int
}

type ShortestInfo struct {
	edges    []Edge
	shortest int
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	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{1}, shortestList, adjacentMatrix)
	for _, v := range shortestList {
		fmt.Printf("%d %d\n", v.getEnd()-1, v.shortest)
	}
}

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

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-1] = shortestInfo
}

func findAdjacents(currentNode int, adjacentMatrix [][]int) []Edge {
	adjacents := adjacentMatrix[currentNode-1]
	edges := []Edge{}
	for i, v := range adjacents {
		if v > 0 {
			edges = append(edges, Edge{start: currentNode, end: i + 1, weight: v})
		}
	}
	return edges
}

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

C++: #include<stdio.h>
#define N 101

int main()
{
  int i,j,n,count=0,v,c,c1,v1;
  int G[N][N],col[N],d[N],pi[N],mincost,i2;

  for(i = 0; i < N; i++){
    for(j = 0; j < N; j++)
      G[i][j] = -1;
  }

  scanf("%d",&n);

  for(i = 0; i < n; i++){
    scanf("%d%d",&v,&c);
    for(j = 0; j < c; j++){
      scanf("%d%d",&v1,&c1);
      G[v][v1] = c1;
    }
  }

  for(i = 0; i < n; i++){
    col[i] = 0;
    pi[i] = -1;
    d[i] = 10000001;
  }

  d[0] = 0;

  while(1){
    mincost = 10000001;
    for(i = 0; i < n; i++){
      if(col[i] != 2 && d[i] < mincost){
        mincost = d[i];
        i2 = i;
      }
    }
    if(mincost == 10000001)break;

    col[i2] = 2;


    for(i = 0; i < n; i++){
      if(G[i2][i] != -1 && col[i] != 2 && (G[i2][i]+d[i2]) < d[i]){
        pi[i] = i2;
        d[i] = G[i2][i] + d[i2];
        col[i] = 1;
      }
    }
  }
  for(i = 0; i < n; i++)printf("%d %d\n",i,d[i]);
    return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
int main(){
  int a,n,k,m[150][150];
  for(int i=0;i<150;i++)for(int j=0;j<150;j++)m[i][j]=1000000;
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>a>>k;
    for(int j=0;j<k;j++){
      cin>>a;
      cin>>m[i][a];
    }
  }
  int dist[100]={};
  int visited[100]={};
  for(int i=1;i<100;i++)dist[i]=1000000;
  while(1){
    int i=-1;
    for(int j=0;j<n;j++){
      if(visited[j]==0){
	if(i==-1||dist[i]>dist[j]){
	  i=j;
	}
      }
    }
    if(i==-1)break;
    visited[i]=1;
    for(int j=0;j<n;j++){
      int A=dist[i]+m[i][j];
      if(dist[j]>A){
	dist[j]=A;
      }
    }
  }
  for(int i=0;i<n;i++)printf("%d %d\n",i,dist[i]);
  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
using P = pair<int, int>;

const int INF = INT_MAX/2;

struct Edge{
  int to;
  int cost;
  Edge():to(0),cost(0){}
  Edge(int to, int cost):to(to),cost(cost){}
  bool operator<(const Edge& e)const{
    return cost < e.cost;
  }
};

void dijkstra(const int start, const vector< vector<Edge> >& G1, vector< vector<int> >& G2){
  for(int i = 0;  i < G2[start].size(); i++){
    G2[start][i] = INF;
  }

  G2[start][0] = 0;

  priority_queue< P > que; //cost, pos
  que.push(P(0, start));
  while(!que.empty()){
    P p = que.top(); que.pop();
    int pos = p.second;
    int cost = p.first;
    if(G2[start][pos] < cost) continue;
    for(int i = 0; i < G1[pos].size(); i++){
      int to = G1[pos][i].to;
      if(G2[start][to] > G2[start][pos] + G1[pos][i].cost){
        G2[start][to] = G2[start][pos] + G1[pos][i].cost;
        que.push(P(G2[start][to], to));
      }
    }
  }
}

int main(void){
  int n;
  cin >> n;
  vector< vector< Edge > >G(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;
      G[u].push_back(Edge(v, c));
    }
  }
  vector< vector<int> > ans(1, vector<int>(n));
  dijkstra(0, G, ans);
  for(int i = 0; i < n; i++) cout << i << " " << ans[0][i] << endl;

  return 0;
}

C++: #include<cstdio>
#include<iostream>
using namespace std;
const int INF = 1e5 + 5;
const int maxn = 105;
int u[maxn];
int cost[maxn][maxn];
int d[maxn];
bool used[maxn];
int V;
void dijkstra(int s) {
	fill(d, d + V, INF);
	fill(used, used + V, false);
	d[s] = 0;
	while(true) {
		int v = -1;
		for(int u = 0; u < V; u++)
			if(!used[u] && (v == -1 || d[u] < d[v])) v = u;
		if(v == -1) break;
		used[v] = true;
		for(int u = 0; u < V; u++)
			d[u] = min(d[u], d[v] + cost[v][u]);
	}
}
int main() {
	scanf("%d", &V);
	for(int i = 0; i < V; i++) 
		for(int j = 0; j < V; j++)
			cost[i][j] = INF;
	for(int i = 0; i < V; i++) {
		int u1 ,k;
		scanf("%d%d", &u1, &k);
		u[i] = u1; 
		while(k--) {
			int v, c;
			scanf("%d%d", &v, &c);
			if(c < cost[u1][v]) {
				cost[u1][v] = c;
				cost[v][u1] = c;	
			}
		}
		
	}
	dijkstra(0);
	for(int i = 0; i < V; i++)
		printf("%d %d\n", u[i], d[u[i]]);
	return 0;
}