Go: package main

import (
	"bufio"
	"fmt"
	"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() {
	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{0}, shortestList, adjacentMatrix)
	for _, v := range shortestList {
		fmt.Printf("%d %d\n", 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<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<vector>

#define INF 2000000001
#define MAX 10001
#define NIL -1

using namespace std;

typedef struct {
    int toid;
    int far;
} PATH;

vector<PATH> D[MAX];
int N;
int Dist[MAX];

void dijkstra(){//0??????????????¢??????????????£?????????
    
    bool complete[MAX];
    vector<int> S;
    
    for (int i = 0; i < N; i++) {
        complete[i] = false;
        Dist[i] = INF;
    }
 
    //???????¨????
    Dist[0] = 0;
    S.push_back(0);
    int u=0,minf;
    complete[u] = true;
    
    while (1) {
        if (S.size() == N) break;
        
        //????????????
        for (int j = 0; j < D[u].size(); j++) {
            if (!complete[D[u][j].toid] && Dist[u] + D[u][j].far < Dist[D[u][j].toid]) {
                Dist[D[u][j].toid] = Dist[u] + D[u][j].far;
            }
        }
        
        
        
        u = NIL;
        minf = INF;
        
        //?¨??????´??°
//        for (int i = 0; i < S.size(); i++) {
//            
//            for (int j = 0; j < D[S[i]].size(); j++) {
//                if (Dist[D[S[i]][j].toid] < minf && !complete[D[S[i]][j].toid]) {
//                    minf = Dist[D[S[i]][j].toid];
//                    u = D[S[i]][j].toid;
//                }
//            }
//            
//        }
        
        for (int i = 0; i < N; i++) {
            if (!complete[i] && Dist[i] < minf) {
                minf = Dist[i];
                u = i;
            }
        }
        
        S.push_back(u);
        complete[u] = true;
        //u = S.size()-1;//????????§u????????§??¨????????????????????????
    }
}

int main(){
    cin >> N;
    for (int i = 0; i < N; i++) {
        int bb1,bb2;
        cin >> bb1 >> bb2;
        for (int j = 0; j < bb2; j++) {
            PATH bb3;
            cin >> bb3.toid >> bb3.far;
            D[i].push_back(bb3);
        }
    }
    
    dijkstra();
    
    for (int i = 0; i < N; i++) {
        printf("%d %d\n",i,Dist[i]);
    }
    
    return 0;
}

C++: #include <bits/stdc++.h> 
using namespace std; 
typedef long long ll; 
#define FOR(I,A,B) for(ll I = (A); I < (B); ++I) 
const ll INF=1e9+7; 
const ll N = 101; 
  
 
class dijkstra{ 
//0indexed 
public: 
	int v,startv; 
	vector<int> d; 
	vector<vector<pair<int,int> > >e; 

void initsize(int n0){ 
	d.resize(n0); 
	for(int i=0;i<n0;i++)d[i]=INT_MAX; 
	vector<pair<int,int> > ep; 
	for(int i=0;i<n0;i++)e.push_back(ep); 
	v=n0; 
}  
 
void initstart(int s){ 
	startv=s;
	d[s]=0;
}
 
void make_edge(int x,int y,int cost){ 
	e[x].push_back(make_pair(y,cost)); 
	e[y].push_back(make_pair(x,cost)); 
}
 
void make_edgedir(int x,int y,int cost){ 
	e[x].push_back(make_pair(y,cost)); 
}
 
void calcdistance(){ 
	// <-cost,x> 
	//cost startv->x 
	priority_queue<pair<int,int> > q; 
	pair<int,int> p; 
	vector<bool> did; 
	for(int i=0;i<v;i++)did.push_back(false); 
	did[startv]=true; 
	for(int i=0;i<e[startv].size();i++){ 
		p.first=-e[startv][i].second; 
		p.second=e[startv][i].first; 
		q.push(p); 
	}
 
	while(q.size()!=0){ 
		pair<int,int> p; 
		p=q.top(); 
		q.pop(); 
		int x,costsx; 
		x=p.second; 
		costsx=-p.first; 
		if(did[x]==true)continue; 
		did[x]=true; 
		d[x]=costsx; 
 
		for(int i=0;i<e[x].size();i++){ 
			p.first=-(d[x]+e[x][i].second); 
			p.second=e[x][i].first; 
			if(did[p.second]==false)q.push(p); 
		}
	}
}
};

int main(){ 
	dijkstra di;
	int n;
	cin>>n;
	di.initsize(n);
	di.initstart(0);
	FOR(i,0,n){
		int u,k;
		cin>>u>>k;
		FOR(j,0,k){
			int x,co;
			cin>>x>>co;
			di.make_edgedir(u,x,co);
		}
	}
	di.calcdistance();
	FOR(i,0,n){
		cout<<i<<" "<<di.d[i]<<endl;
	}
	return 0; 
}