Go: // Warshall–Floyd Algorithm

package main

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

var scanner = bufio.NewScanner(os.Stdin)

const INF = 0x7FFFFFFF

func main() {
	for scanner.Scan() {
		buf := strings.Split(scanner.Text(), " ")
		n, _ := strconv.Atoi(buf[0])
		m, _ := strconv.Atoi(buf[1])
		if n == 0 && m == 0 {
			break
		}
		c_matrix := make([][]int, m)
		for i := range c_matrix {
			c_matrix[i] = make([]int, m)
		}
		t_matrix := make([][]int, m)
		for i := range t_matrix {
			t_matrix[i] = make([]int, m)
		}
		for i := 0; i < n; i++ {
			scanner.Scan()
			buf_ := strings.Split(scanner.Text(), " ")
			a, _ := strconv.Atoi(buf_[0])
			b, _ := strconv.Atoi(buf_[1])
			c, _ := strconv.Atoi(buf_[2])
			t, _ := strconv.Atoi(buf_[3])
			c_matrix[a-1][b-1] = c
			t_matrix[a-1][b-1] = t
		}
		c_dist := make([][]int, m)
		c_prev := make([][]int, m)
		t_dist := make([][]int, m)
		t_prev := make([][]int, m)
		for i := 0; i < m; i++ {
			c_dist[i] = make([]int, m)
			c_prev[i] = make([]int, m)
			t_dist[i] = make([]int, m)
			t_prev[i] = make([]int, m)
		}
		for i := 0; i < m; i++ {
			for j := 0; j < m; j++ {
				if c_matrix[i][j] == 0{
					c_dist[i][j] = INF
				} else {
					c_dist[i][j] = c_matrix[i][j]
				}
				if c_matrix[i][j] == 0{
					c_prev[i][j] = -1
				} else {
					c_prev[i][j] = i
				}
				if t_matrix[i][j] == 0{
					t_dist[i][j] = INF
				} else {
					t_dist[i][j] = t_matrix[i][j]
				}
				if t_matrix[i][j] == 0{
					t_prev[i][j] = -1
				} else {
					t_prev[i][j] = i
				}
			}
			c_dist[i][i] = 0
			t_dist[i][i] = 0
		}
		for k := 0; k < m; k++ {
			for i := 0; i < m; i++ {
				for j := 0; j < m; j++ {
					c_newlen := c_dist[i][k] + c_dist[k][j]
					t_newlen := t_dist[i][k] + t_dist[k][j]
					if c_newlen < c_dist[i][j] {
						c_dist[i][j] = c_newlen
						c_prev[i][j] = c_prev[k][j]
					}
					if t_newlen < t_dist[i][j] {
						t_dist[i][j] = t_newlen
						t_prev[i][j] = t_prev[k][j]
					}
				}
			}
		}
		scanner.Scan()
		k, _ := strconv.Atoi(scanner.Text())
		for i := 0; i < k; i++ {
			scanner.Scan()
			buf_ := strings.Split(scanner.Text(), " ")
			p, _ := strconv.Atoi(buf_[0])
			q, _ := strconv.Atoi(buf_[1])
			r, _ := strconv.Atoi(buf_[2])
			switch r {
			case 0: fmt.Println(c_dist[p-1][q-1])
			case 1: fmt.Println(t_dist[p-1][q-1])
			}
		}
	}
}

C++: #include<vector>
#include<queue>
#include<iostream>
#include<algorithm>
using namespace std;
#define MAX_V 101
#define MAX_E 3001
#define INF 1e9
using namespace std;
int cost[MAX_V][MAX_V];
int time[MAX_V][MAX_V];
int cost_d[MAX_V];
int time_d[MAX_V];
bool used[MAX_V];
int V;
int E;

void cost_dijkstra(int s) {
	for (int i = 0; i < V; i++) {
		cost_d[i] = INF;
		used[i] = false;
	}
	cost_d[s] = 0;
	
	while (true) {
		int v = -1;
		for (int u = 0; u < V; u++) {
			if (!used[u] && (v == -1 || cost_d[u] < cost_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++) {
			if (cost[v][u] != -1) {
				cost_d[u] = min(cost_d[u], cost_d[v] + cost[v][u]);
			}
		}

	}
}
void time_dijkstra(int s) {
	for (int i = 0; i < V; i++) {
		time_d[i] = INF;
		used[i] = false;
	}
	time_d[s] = 0;

	while (true) {
		int v = -1;
		for (int u = 0; u < V; u++) {
			if (!used[u] &&( v == -1 || time_d[u] < time_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++) {
			if (cost[v][u] != -1) {
				time_d[u] = min(time_d[u], time_d[v] + cost[v][u]);
			}
		}

	}
}

int main() {


	while (cin >> E >> V, (E != 0 && V != 0)) {
		for (int i = 0; i < V; i++) {
			for (int j = 0; j < V; j++) {
				cost[i][j] = -1;
				time[i][j] = -1;
			}
		}
		
		for (int i = 0; i < E; i++) {
			int a, b;
			cin >> a >> b;
			cin >> cost[a-1][b-1] >> time[a-1][b-1];
		}
	
		int k;//クエリの数
		cin >> k;
		
		for(int i=0;i<k;i++){
			int p, q, r;
			cin >> p>>q>>r;
			
			//cost
			if (r == 0) {
				cost_dijkstra(p-1);
				cout << cost_d[q-1] << endl;
			}
			//time
			else if(r==1){

				time_dijkstra(p-1);
				cout << time_d[q-1] << endl;
			}
			
		}
	}
	return 0;
}

C++: #include <cstdio>
#include <vector>
#include <queue>
#include <algorithm>

#define MAX_M 100
#define INF 1145141919

class edge{
public:
    int to;
    int cost;
    int time;
};

typedef std::pair<int, int> P;

int n, m, a, b, c, t, k, s, g, r;
int value[2][MAX_M + 1];
std::vector<edge> G[MAX_M + 1];


int ret(edge e){
    if(r == 0) return e.cost;
    return e.time;
}

void dij(){
    std::fill(value[r], value[r] + MAX_M + 1, INF);
    value[r][s] = 0;

    std::priority_queue<P, std::vector<P>, std::greater<P> > que;
    que.push(P(0, s));

    while(!que.empty()){
        P p = que.top(); que.pop();
        if(value[r][p.second] < p.first) continue;

        for(int i = 0; i < G[p.second].size(); i++){
            edge e = G[p.second][i];
            int u = ret(e);
            if(value[r][e.to] > value[r][p.second] + u){
                value[r][e.to] = value[r][p.second] + u;
                que.push(P(value[r][e.to], e.to));
            }
        }
    }

    printf("%d\n", value[r][g]);
}

int main(){

    while(scanf("%d %d", &n, &m) != EOF){
        if(n == 0 && m == 0) break;

        for(int i = 0; i < n; i++){
            scanf("%d %d %d %d", &a, &b, &c, &t);
            a; b;


            edge e1, e2;
            e1.to   = b; e2.to = a;
            e1.cost = c; e2.cost = c;
            e1.time = t; e2.time = t;
            G[a].push_back(e1);
            G[b].push_back(e2);
        }


        scanf("%d", &k);
        for(int i = 0; i < k; i++){
            scanf("%d %d %d", &s, &g, &r);
            s; g;

            dij();
        }
    }

    return 0;
}

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

void open(int max[101],int name[101][101][2],int m,int basic,int r)
{
	int i;
	for(i=1;i<=m;i++)
	{
		if(i==basic)
			continue;
		if(name[basic][i][r] != 0)
		{
			if(max[i] == -1)
			{
				max[i] = name[basic][i][r] + max[basic];
				open(max,name,m,i,r);
			}
			else if(max[i] > max[basic] + name[basic][i][r])
			{
				max[i] = name[basic][i][r] + max[basic];
				open(max,name,m,i,r);
			}
		}
	}
}

int main(void)
{
	while(1)
	{
		int n,m;
		int a,b,cost,time;
		int k;
		int p,q,r;
		int mintime;
		int mincost;
		int i,j,x,y;
		bool F5;

		int name[101][101][2] = {};//OÍ¿à
		int max[101]={};

		cin >> n >> m;

		if(n==0 && m==0)
			return 0;

		for(i=0;i<n;i++)
		{
			cin >> a >> b >> cost >> time;
			name[a][b][0] = cost;
			name[b][a][0] = cost;
			name[a][b][1] = time;
			name[b][a][1] = time;
		}

		cin >> k;

		for(i=0;i<k;i++)
		{
			F5 = true;
			cin >> p >> q >> r;

			for(j=0;j<101;j++)
			{
				max[j] = -1;
			}

			max[p] = 0;

			open(max,name,m,p,r);

			cout << max[q] << endl;
		}
	}
	return 0;
}