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 <iostream>
#include <cstdio>
#include <vector>
#include <utility>
#include <queue>
#include <functional>
#define N 101
#define INF 200000000
using namespace std;

int main(void){
	int a,b,c,d;
	int n,m;
	while(cin>>n>>m,n||m){
		int dp[m+1][m+1];
		int dp1[m+1][m+1];
		for(int i=1;i<=m;i++){
			for(int j=1;j<=m;j++){
				if(i==j)dp[i][j]=dp1[i][j]=0;
				else dp[i][j]=dp1[i][j]=INF;
			}
		}

		for(int i=0;i<n;i++){
			cin>>a>>b>>c>>d;
			dp[b][a]=c;
			dp[a][b]=c;
			dp1[b][a]=d;
			dp1[a][b]=d;
		}

		for(int k=1;k<=m;k++){
			for(int u=1;u<=m;u++){
				for(int v=1;v<=m;v++){
					dp[u][v]=min(dp[u][v],dp[u][k]+dp[k][v]);
					dp1[u][v]=min(dp1[u][v],dp1[u][k]+dp1[k][v]);
				}
			}
		}

		int k;
		cin>>k;
		while(k--){
			cin>>a>>b>>c;
			if(c) cout<<dp1[a][b]<<endl;
			else cout<<dp[a][b]<<endl;
		}
	}
	return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<cstring>
#define INF 111111111
using namespace std;

int n,m;
int a,b,c,d,cost[1000][1000][10];
int memo[1000];
int ans[1000][10];
int k,x,y,z;

void solve(){
  ans[x][z] = 0;

  while(true){
    int s = -1;

    for(int i=1;i<=m;i++){
      if(!memo[i] && (s == -1 || ans[i][z] < ans[s][z])) s = i;
    }

    if(s == -1) break;
    memo[s] = 1;

    for(int i=1;i<=m;i++) ans[i][z] = min(ans[i][z],ans[s][z] + cost[i][s][z]);
  }
}

int main(){

  while(true){
    cin >> n >> m;
    if(!n && !m) break;

    for(int i=0;i<1000;i++){
      for(int j=0;j<1000;j++) cost[i][j][0] = cost[i][j][1] = INF;
    }

    for(int i=0;i<n;i++){
      cin >> a >> b >> c >> d;
     
      cost[a][b][0]= cost[b][a][0] = c;
      cost[a][b][1] = cost[b][a][1] = d;

    }

    cin >> k;

    for(int i=0;i<k;i++){
      cin >> x >> y >> z;

      memset(memo,0,sizeof(memo));
      for(int i=0;i<1000;i++) ans[i][0] = ans[i][1] = INF;

      solve();
      cout << ans[y][z] << endl;

    }
  }
}

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

using namespace std;

int i, j, k, p, q, r, n, m, a, b, c, cost[101], t, dc[101][101], dt[101][101];

int dic(int d[101][101]) {
  cost[p] = 0;
  int min, f[101] = {};
  for(i = 0; i < m; i++) {
    f[p] = 1;
    for(j = 1; j <= m; j++) {
      if(f[j]) continue;
      if(cost[j] > cost[p] + d[p][j]) cost[j]  = cost[p] + d[p][j];
    }
    min = 200000000;
    for(j = 1; j <= m; j++ ) {
      if(f[j]) continue;
      if(min > cost[j]) min = cost[p = j];
    }
  }
  return cost[q];
}


int main() {
  for(i = 0; i <= 100; i++)
    for(j = 0; j <= 100; j++) {
      dc[i][j] = 100000000;
      dt[i][j] = 100000000;
    }
  
  cin >> n >> m;
  
  while(n--) {
    cin >> a >> b >> c >> t;
    dc[a][b] = dc[b][a] = c;
    dt[a][b] = dt[b][a] = t;
  }
  
  cin >> k;
  
  while(k--) {
    cin >> p >> q >> r;
    for(i = 0; i <= 100; i++) cost[i] = 1000000000;
    if(r) cout << dic(dt) << endl;
    else cout << dic(dc) << endl;
  }
  
  return 0;
}

C++: #include<iostream>
#include<stack>
#include<queue>
#include<map>
#include<queue>
#include<algorithm>
#include<cstdio>
#include<cstring>
using namespace std;

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

const int maxn=301,maxm=101,INF = 200000;
const int COST = 0, TIME = 1;

int n,m;

struct edge
{
    int to,cost;
    edge(int to,int cost):to(to),cost(cost){};
};

typedef pair<int,int> p;

int main()
{
    while(cin >> n >> m && (n||m))
    {
        vector<edge> cost[2][maxm];
        //vector<edge> cost[COST][maxm];
        int a,b,tc,tt;
        REP(n)
        {
            cin >> a >> b >> tc >> tt;
            cost[TIME][a].push_back(edge(b,tt));
            cost[TIME][b].push_back(edge(a,tt));
            cost[COST][a].push_back(edge(b,tc));
            cost[COST][b].push_back(edge(a,tc));
        }

        int k; cin >> k;

        int start,goll,r;
        while(k--)
        {
            cin >> start >> goll >> r;
            int d[maxm] = {};
            memset(d,INF,sizeof(d));
            d[1] = 0;

            priority_queue<p,vector<p>, greater<p> > que;
            que.push(p(0,start) );

            while(!que.empty())
            {
                p tp = que.top(); que.pop();
                int v = tp.second; //確定ノード
                if(d[v] < tp.first) continue;
                REP(cost[r][v].size())
                {
                    edge e = cost[r][v][i];
                    if(d[e.to] > d[v] + e.cost)
                    {
                        d[e.to] = d[v] + e.cost;
                        que.push(p(d[e.to], e.to));
                    }
                }
            }
            cout << d[goll] << endl;
        }
    }

    return 0;
}