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]
					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>


const unsigned int inf = 1 << 26;

const int MAX_OF_INFOMATIONS = 300; // 路線情報の最大数

const int MAX_OF_STATIONS = 100; // 駅の最大数

const int MAX_OF_ENQUIRIES = 200; // 問い合わせの最大数


// 大工ストアならぬダイクストラ

int dijk(int m, int n, int s, int g[2][MAX_OF_STATIONS][MAX_OF_STATIONS], int ary[2][MAX_OF_STATIONS][MAX_OF_STATIONS]) {

	bool *used = new bool[n];

	unsigned int *d = new unsigned int[n];


	// std::cout << "n = " << n << " " << "s = " << s << std::endl;


	for(int i = 0; i < n; i++)
		d[i] = inf;

	d[s] = 0;

	for(int i = 0; i < n; i++)
		used[i] = false;


	while(true) {

		int u = -1;

		for(int v = 0; v < n; v++)

		if(!used[v] && (u == -1 || d[v] < d[u]))
			u = v;


			// std::cout << "u = " << u << std::endl;


		if(u == -1) break;

		used[u] = true;


		for(int v = 0; v < n; v++)
			if(d[v] > d[u] + g[m][u][v])
				d[v] = d[u] + g[m][u][v];

	}


	for(int i = 0; i < n; i++)
		ary[m][s][i] = d[i];


// for(int i = 0; i < n; i++)

// std::cout << "d[" << i << "] = " << d[i] << std::endl;


	return 0;

}


int main() {

	int a[MAX_OF_INFOMATIONS] = {}, // 駅番号aの配列

	b[MAX_OF_INFOMATIONS] = {}, // 駅番号bの配列

	cost[MAX_OF_INFOMATIONS] = {}, // aからbまでの運賃

	time[MAX_OF_INFOMATIONS] = {}, // aからbまでの移動時間

	p[MAX_OF_ENQUIRIES] = {}, // 始点a

	q[MAX_OF_ENQUIRIES] = {}, // 終点b

	r[MAX_OF_ENQUIRIES] = {}, // 知りたい情報の種類

	d[2][MAX_OF_STATIONS][MAX_OF_STATIONS] = {},

	g[2][MAX_OF_STATIONS][MAX_OF_STATIONS] = {};

	int info, // 路線情報数

	station, // 駅の数

	enquiry; // 問い合わせ数


	while(true) {

		std::cin >> info;

		std::cin >> station;


		// 初期化処理

		for(int i = 0; i < 2; i++) {

			for(int j = 0; j < station; j++) {

				for(int k = 0; k < station; k++) {

					g[i][j][k] = inf;

					d[i][j][k] = inf;

				}

			}

		}


		// inputが0 0だったら終了

		if(!info && !station) break;


		for(int i = 0; i < info; i++) {

			std::cin >> a[i];

			std::cin >> b[i];

			std::cin >> cost[i];

			std::cin >> time[i];

		}


			// a - 1, b - 1をする(駅番号が1からmまでである)

		for(int i = 0; i < info; i++) {

			a[i]--;

			b[i]--;

		}


			// 時間と運賃を配列に入れる

		for(int i = 0; i < info; i++) {

			g[0][a[i]][b[i]] = time[i];

			g[1][a[i]][b[i]] = cost[i];

			g[0][b[i]][a[i]] = time[i];

			g[1][b[i]][a[i]] = cost[i];


		}


		// 大工ストアじゃなくてダイクストラに入れる

		for(int i = 0; i < station; i++) {

//			dijk(0, station, i, g, d);

//			dijk(1, station, i, g, d);

		}


		std::cin >> enquiry;


		// 問い合わせ

		for(int i = 0; i < enquiry; i++) {

			std::cin >> p[i];

			std::cin >> q[i];

			std::cin >> r[i];

		}


		// 数合わせ.

		for(int i = 0; i < enquiry; i++) {

			p[i]--;

			q[i]--;

		}


// 表示

		for(int i = 0; i < enquiry; i++)

			std::cout << d[!r[i]][p[i]][q[i]] << std::endl;

//		std::cout << !0 << std::endl;

	}


	return 0;

}

C++: #include <set>
#include <map>
#include <list>
#include <queue>
#include <stack>
#include <cmath>
#include <ctype.h>
#include <ctime>
#include <cstdio>
#include <vector>
#include <string>
#include <bitset>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <utility>
#include <numeric>
#include <complex>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <cassert>
#include <iostream>
#include <iterator>
#include <algorithm>

using namespace std;

#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i, n) REP(i, 0, n)

//4方向ベクトル→↑←↓
int dx[] ={1,0,-1,0};
int dy[] ={0,-1,0,1};

int n,m;//線路の情報の数,駅の数
int dpc[101][101];
int dpt[101][101];
const int INF = 100000000;


void WarshallFloyd(){
  for(int i = 1;i <= m;i++){
    for(int j = 1;j <=m;j++){
      for(int k = 1;k <=m;k++){
      dpc[j][k] =min(dpc[j][k],dpc[j][i]+dpc[i][k]);
      dpt[j][k] =min(dpt[j][k],dpt[j][i]+dpt[i][k]);
      }
    }
  }
  return;
}

int main()
{
  while(cin >>n>>m){
    if(n ==0&&m ==0){
      break;
    }
   
    for(int i = 1;i <=m ;i++){
      for(int j = 1;j <=m;j++){
	dpc[i][j] =INF;
	dpc[j][i] =INF;
	dpt[i][j] =INF;
	dpt[j][i] =INF;
      }
    }
    for(int i = 1;i <= m;i++){
      dpc[i][i] = 0;
      dpt[i][i] = 0;
    }
    for(int i = 0;i < n;i++){
      int from,to,cost,time;
      cin >>from>>to>>cost>>time;
      dpc[from][to] =cost;
      dpt[from][to] =time;
      dpc[to][from] =cost;
      dpt[to][from] =time;
    }
    /* for(int i = 1;i <=m;i++){
      for(int j = 1;j <=m;j++){
	cout <<"dpc["<<i<<"]["<<j<<"]"<<dpc[i][j] <<endl;
	cout <<"dpt["<<i<<"]["<<j<<"]"<<dpt[i][j] <<endl;
      }
      }*/
    WarshallFloyd();
    int k;//問い合わせの数
    cin >>k;
    for(int i = 0;i <k;i++){
      int s;
      int f;
      int r;
      cin >>s>>f>>r;
      if(r)
	cout<<dpt[s][f]<<endl;
      else
	cout<<dpc[s][f]<<endl;
    }
  }
  return 0;
}

C++: #include <bits/stdc++.h>
#define r(i,n) for(int i=0;i<n;i++)
#define INF 1<<29
using namespace std;
main(){
  int m,n;
  while(cin>>m>>n,n){
    int a1[n][n],a2[n][n],q,w,e,r;
    r(i,n)r(j,n){
      if(i==j)a2[i][j]=a1[i][j]=0;
      else a2[i][j]=a1[i][j]=INF;
    }
    while(m--){
      scanf("%d%d%d%d",&q,&w,&e,&r);q--;w--;
      a1[q][w]=a1[w][q]=e;
      a2[q][w]=a2[w][q]=r;
    }
    r(k,n)r(i,n)r(j,n){
      a1[i][j]=min(a1[i][j],a1[i][k]+a1[k][j]);
      a2[i][j]=min(a2[i][j],a2[i][k]+a2[k][j]);
    }
    cin>>e;
    while(e--){
      scanf("%d%d%d",&q,&w,&e);q--;w--;
      if(r)cout<<a2[w][q]<<endl;
      else cout<<a1[w][q]<<endl;
    }
  }
}