Go: // Warshall–Floyd Algorithm

package main

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

var scanner = bufio.NewScanner(os.Stdin)

const INF = 2000000000

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
					c_prev[i][j] = -1
				} else {
					c_dist[i][j] = c_matrix[i][j]
					c_prev[i][j] = i
				}
				if t_matrix[i][j] == 0 {
					t_dist[i][j] = INF
					t_prev[i][j] = -1
				} else {
					t_dist[i][j] = t_matrix[i][j]
					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]
					if c_newlen < c_dist[i][j] {
						c_dist[i][j] = c_newlen
						c_prev[i][j] = c_prev[k][j]
					}
				}
			}
		}
		for k := 0; k < m; k++ {
			for i := 0; i < m; i++ {
				for j := 0; j < m; j++ {
					t_newlen := t_dist[i][k] + t_dist[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 <iostream>
using namespace std;

int main(){
    //n..線路の情報の数 m..駅の数
    while(true){
        int n,m;
        cin >> n >> m;

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


        int money[m][m];
        int time[m][m];

        for(int i=0;i<m;i++){
            for(int j=0;j<m;j++){
                if(i==j){
                    money[i][j] = 0;
                    time[i][j] = 0;
                }else{
                    money[i][j] = 10000;
                    time[i][j] = 10000;
                }
            }
        }

        for(int i=0;i<n;i++){
            int a,b,c,t;
            cin >> a >> b >> c >> t;
            //入力から表の作成
            money[a-1][b-1] = money[b-1][a-1] = c;
            time[a-1][b-1] = time[b-1][a-1] = t;
        }

        for(int k=0;k<m;k++){
            for(int i=0;i<m;i++){
                for(int j=0;j<m;j++){
                    money[i][j] = min(money[i][j],money[i][k]+money[k][j]);
                    time[i][j] = min(time[i][j],time[i][k]+time[k][j]);
                }
            }
        }



        //問い合わせ数
        int k;
        cin >> k;

        int p[k],q[k],r[k];

        for(int i=0;i<k;i++){
            cin >> p[i] >> q[i] >> r[i];
        }


        for(int i=0;i<k;i++){
            if(r[i]==0){
                cout << money[p[i]-1][q[i]-1] << endl;
            }else{
                cout << time[p[i]-1][q[i]-1] << endl;
            }
        }
    }
    
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <climits>

using namespace std;

typedef vector< int > VI;
typedef vector< VI > VVI;

int main(){
	while(true){
		int n, m;

		cin >> n >> m;

		if(n == 0 && m == 0){
			break;
		}

		VVI map_cost(m + 1, VI(m + 1, INT_MAX / 4));
		VVI map_time(m + 1, VI(m + 1, INT_MAX / 4));

		for(int i = 0; i < m; i++){
			map_cost[i][i] = 0;
			map_time[i][i] = 0;
		}

		for(int i = 0; i < n; i++){
			int a, b, cost, time;
			cin >> a >> b >> cost >> time;

			a--;
			b--;

			map_cost[a][b] = cost;
			map_time[a][b] = time;
		}

		for(int k = 0; k < m; k++){
			for(int i = 0; i < m; i++){
				for(int j = 0; j < m; j++){
					map_cost[i][j] = min(map_cost[i][j], map_cost[i][k] + map_cost[k][j]);
					map_time[i][j] = min(map_time[i][j], map_time[i][k] + map_time[k][j]);
				}
			}
		}

		int k;
		cin >> k;

		for(int i = 0; i < k; i++){
			int p, q, r;

			cin >> p >> q >> r;

			p--;
			q--;
			if(r == 0){
				cout << map_cost[p][q] << endl;
			}
			else if(r == 1){
				cout << map_time[p][q] << endl;
			}
		}
	}
}

C++: #include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <algorithm>
#include <string>
#include <bitset>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <string.h>

#define X first
#define Y second
#define MP make_pair
typedef long long ll;
using namespace std;
const int MAX = 101;


struct E{
	E(int from, int to, int cost, int time):from(from), to(to){
		ct[0] = cost;
		ct[1] = time;
	}
	int from, to;
	int ct[2];	//ct[0]がcost、ct[1]がtime
};

void bf(int s, int e, int mode, vector<E> &tb, int *d){
	d[s] = 0;
	while(1){
		bool update = false;
		for(int i = 0; i < tb.size(); i++){
			if(d[tb[i].to] > d[tb[i].from] + tb[i].ct[mode]){
				d[tb[i].to] = d[tb[i].from] + tb[i].ct[mode];
				update = true;
			}
		}
		if(!update) break;
	}
}

int main(){
	int n, m;	//nが線路数、mが駅数
	while(cin >> n >> m && n|m){
		vector<E> tb;
		for(int i = 0; i < n; i++){
			int a, b, cost, time;
			cin >> a >> b >> cost >> time;
			tb.push_back(E(a, b, cost, time));
		}

		int mincost[101];
		int mintime[101];
		fill(mincost, mincost+101, 1<<29);
		fill(mintime, mintime+101, 1<<29);
		
		bf(1, m, 0, tb, mincost);
		bf(1, m, 1, tb, mintime);

		int k;
		cin >> k;
		for(int i = 0; i < k; i++){
			int s, e, mode;
			cin >> s >> e >> mode;

			if(mode==0){
				cout << mincost[e]-mincost[s] << endl;
			}else{
				cout << mintime[e]-mintime[s] << endl;
			}
		}
	}
	return 0;
}