Go: package main

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

const (
	INFTY = 1 << 21
	NIL   = -1
)

const (
	WHITE = iota
	GRAY
	BLACK
)

type Graph [][]int

func (g *Graph) dikstra(n int) string {
	var (
		u, minv = 0, 0
	)

	d := make([]int, n)
	color := make([]int, n)

	for i := 0; i < n; i++ {
		d[i] = INFTY
		color[i] = WHITE
	}
	d[0] = 0
	color[0] = GRAY

	for {
		minv = INFTY
		u = -1
		for i := 0; i < n; i++ {
			if minv > d[i] && color[i] != BLACK {
				u = i
				minv = d[i]
			}
		}

		if u == -1 {
			break
		}

		color[u] = BLACK
		for v := 0; v < n; v++ {
			if color[v] != BLACK && (*g)[u][v] != INFTY {
				if d[v] > d[u]+(*g)[u][v] {
					d[v] = d[u] + (*g)[u][v]
					color[v] = GRAY
				}
			}
		}
	}

	var out bytes.Buffer
	for i := 0; i < n; i++ {
		out.WriteString(fmt.Sprintf("%d ", i))
		if d[i] == INFTY {
			out.WriteString(fmt.Sprintf("%d\n", -1))
			continue
		}
		out.WriteString(fmt.Sprintf("%d\n", d[i]))
	}

	return strings.TrimRight(out.String(), "\n")
}

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

	sc.Scan()
	n, _ := strconv.Atoi(sc.Text())

	g := make(Graph, n)
	for i := 0; i < n; i++ {
		g[i] = make([]int, n)
		for j := 0; j < n; j++ {
			g[i][j] = INFTY
		}
	}

	for i := 0; i < n; i++ {
		sc.Scan()
		u, _ := strconv.Atoi(sc.Text())
		sc.Scan()
		k, _ := strconv.Atoi(sc.Text())

		for j := 0; j < k; j++ {
			sc.Scan()
			v, _ := strconv.Atoi(sc.Text())
			sc.Scan()
			c, _ := strconv.Atoi(sc.Text())

			g[u][v] = c
		}
	}

	return g.dikstra(n)
}

func main() {
	fmt.Println(answer(os.Stdin))
}

C++: #include<iostream>
using namespace std;

#define N 100
#define MAX 100001
#define che cout<<"-----"<<endl

int cnt = 0;

class Po{
public:
    int i;
    int d;
    int o;
};

void change(Po *a, int i);
void maxHeapify(Po *a, int i);
void buildMaxHeap(Po *a, int n);

int main() {
    
    Po a[N][N];
    int n, u, k, c, v;
    cin>>n;
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < n; j++) {
            a[i][j].d = MAX;
        }
    }
    
    for(int i = 0; i < n; i++) {
        cin>>u>>k;
        for(int j = 0; j < k; j++) {
            cin>>c>>v;
            a[u][c].d = v;
            a[u][c].i = c;
            a[u][c].o = u;
        }
    }
    
    int list[N];
//    for(int i = 0; i < n; i++) list[i] = MAX;
    list[0] = 0;
    Po q[100000], mini;
    for(int i = 1; i < n; i++) {
        if(a[0][i].d != MAX) {
            cnt++;
            q[cnt] = a[0][i];
            change(q, cnt);
        }
    }
    
    int num = 0;
    while(1) {
        mini = q[1];
        q[1] = q[cnt];
        cnt--;
        maxHeapify(q, 1);
        if(list[ mini.i ] == 0) {
            list[ mini.i ] = mini.d;
            for(int i = 1; i < n; i++) {
                if(a[mini.i][i].d != MAX) {
                    cnt++;
                    a[mini.i][i].d += mini.d;
                    q[cnt] = a[mini.i][i];
                    change(q, cnt);
                }
            }
            num++;
        }
        if(num == n-1) break;
    }
    
    for(int i = 0; i < n; i++) {
        cout<<i<<' '<<list[i]<<endl;
    }
    
    return 0;
}

void change(Po *a, int i) {
    int p = i % 2 == 0 ? i/2 : (i-1)/2;
    if(p >= 1 && a[i].d < a[p].d ) {
        Po tmp = a[i];
        a[i] = a[p];
        a[p] = tmp;
        change(a, p);
    }
}

void maxHeapify(Po *a, int i) {

  int l = i*2;
  int r = i*2+1;

  int largest = i;
  if(l <= cnt && a[l].d < a[largest].d )  largest = l;

  if(r <= cnt && a[r].d < a[largest].d ) largest = r;

  if(largest != i) {
    Po s = a[i];
    a[i] = a[largest];
    a[largest] = s;
    maxHeapify(a, largest);
  }
}

C++: #include<iostream>
#include<vector>
#include<algorithm>
#define MAX_V 100
#define INF 1e9
using namespace std;
int cost[MAX_V][MAX_V];
int d[MAX_V];
bool used[MAX_V];
int V;
void dijkstra(int s) {
	for (int i = 0; i < V; i++) {
		d[i] = INF;
		used[i] = 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;
			}
		}
		//全ての頂点が到達済み
		if (v == -1) {
			break;
		}
		//集合に新たに頂点を追加
		used[v] = true;
		for (int u = 0; u < V; u++) {
			d[u] = min(d[u], d[v] + cost[v][u]);
		}
	}
}

int main() {
	for (int i = 0; i < V+80; i++) {
		for (int j = 0; j < V+80; j++) {
			cost[i][j] = INF;//iからjへの辺の重さ
		}
	}
	cin >> V;
	for (int i = 0; i < V; i++) {
		int u;
		cin >> u;
		int k;
		cin >> k;
		for (int j = 0; j < k; j++) {
			int v;
			cin >> v;
			int c;
			cin >> c;
			cost[u][v] = c;
		}
	}
	dijkstra(0);

	for (int i = 0; i < V; i++) {
		cout << i << " " << d[i] << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <bitset>
#include <utility>
#include <functional>
#include <numeric>

//TODO

template <class T>
using vec = std::vector<T>;

constexpr int nil = -1;
constexpr int inf = 1 << 30;

struct Edge
{
    int to;
    int cost;
};

vec<int> dijkstra(const vec<vec<Edge>>& edges)
{
    using namespace std;

    const int n = edges.size();
    vec<int> distances(n, inf);
    vec<bool> reached(n, false);

    distances[0] = 0;

    while (true)
    {
        int minCost {inf};
        int u {};

        for (int i = 0; i < n; ++i)
        {
            if (!reached[i] && distances[i] < minCost)
            {
                minCost = distances[i];
                u = i;
            }
        }

        if (minCost == inf)
            break;
        
        reached[u] = true;

        for (auto& e : edges[u])
        {
            distances[e.to] = min(distances[e.to], distances[u] + e.cost);
        }
    }

    return distances;
}

void solve()
{
    using namespace std;
    int n;
    cin >> n;

    //隣接リスト形式
    vec<vec<Edge>> edges(n);
    
    //入力
    for (int i = 0, k; i < n; ++i)
    {
        cin.ignore();
        cin.ignore();
        cin >> k;
        for (int j = 0, to, cost; j < k; ++j)
        {
            cin >> to >> cost;
            edges[i].push_back({to, cost});
        }
    }

    auto d = dijkstra(edges);

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

int main()
{
    solve();
    return 0;
}