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 <cstdio>
#include <algorithm>
using namespace std;
#define INF 100000000

int n,m,k,p,q,r;
int d[2][100][100];

int main(){
	while(scanf("%d%d", &n, &m)){
		if(n == 0 && m == 0) break;
		for(int i = 0; i < 2; i++){
			for(int j = 0; j < 100; j++){
				for(int k = 0; k < 100; k++) d[i][j][k] = INF;
			}
		}
		for(int i = 0; i < 2; i++){
			for(int j = 0; j < 100; j++) d[i][j][j] = 0;
		}
			
		for(int i = 0; i < n; i++){
			int a,b,c[2];
			scanf("%d%d%d%d", &a, &b, &c[0], &c[1]);
			a--; b--;
			for(int j = 0; j < 2; j++) d[j][a][b] = c[j];
		}
		for(int u = 0; u < 2; u++){
			for(int k = 0; k < m; k++){
				for(int i = 0; i < m; i++){
					for(int j = 0; j < m; j++){
						d[u][i][j] = min(d[u][i][j],d[u][i][k]+d[u][k][j]);
					}
				}
			}
		}
		scanf("%d", &k);
		for(int i = 0; i < k; i++){
			scanf("%d%d%d", &p, &q, &r);
			p--; q--;
			printf("%d\n", d[r][p][q]); 
		}
	}
}

C++: #include <iostream>
#include <algorithm>
#define MAX_M 100
using namespace std;

const int INF = 1e6;
int dp_cost[MAX_M][MAX_M];
int dp_time[MAX_M][MAX_M];
int m;

void warshall_froyd(){
  for(int k=0;k<m;k++){
    for(int i=0;i<m;i++){
      for(int j=0;j<m;j++){
        dp_cost[i][j] = min(dp_cost[i][j], dp_cost[i][k] + dp_cost[k][j]);
        dp_time[i][j] = min(dp_time[i][j], dp_time[i][k] + dp_time[k][j]);
      }
    }
  }
}

int main(){
  int n;
  cin >> n >> m;
  for(int i=0;i<m;i++){
    for(int j=0;j<m;j++){
      dp_time[i][j] = (i==j ? 0 : INF);
      dp_cost[i][j] = (i==j ? 0 : INF);
    }
  }

  for(int i=0;i<n;i++){
    int a,b,cost,time;
    cin >> a >> b >> cost >> time;
    dp_cost[a][b] = cost; dp_cost[b][a] = cost;
    dp_time[a][b] = time; dp_time[b][a] = time;
  }
  
  warshall_froyd();

  int k,p,q,r;
  cin >> k;
  for(int i=0;i<k;i++){
    cin >> p >> q >> r;
    cout << (r == 0 ? dp_cost[p][q] : dp_time[p][q]) << endl;
  }
  cin >> p >> q;
  return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <array>
#include <queue>

using namespace std;

int const Inf = 10000000;
int const N = 100;

typedef array<int, 2> line;

int main()
{
    int n, m;
    while( cin >> n >> m, n||m ) {
        line table[N][N] = {};

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

            int const from = a-1, to = b-1;
            line const in = {{cost, time}};
            table[from][to] = ( table[to][from] = in );
        }

        int k;
        cin >> k;
        for( int i=0; i<k; ++i ) {
            int p, q, r;
            cin >> p >> q >> r;
            int const from = p-1, to = q-1;

            bool v[N] = {};
            int d[N];
            fill( d, d+N, Inf );

            priority_queue<int, vector<int>, greater<int>> w;
            w.push( from );
            d[from] = 0;

            while( !w.empty() ) {
                int const cur = w.top();
                w.pop();

                if ( v[cur] )
                    continue;
                v[cur] = true;

                for( int ii=0; ii<m; ++ii ) {
                    if ( table[cur][ii][0] == 0 )
                        continue;

                    if ( d[cur] + table[cur][ii][r] < d[ii] ) {
                        d[ii] = d[cur] + table[cur][ii][r];
                        w.push( ii );
                    }

                    //cout << cur+1 << " -> " << ii+1 << " c " << d[ii] << endl;
                }
            }

            cout << d[to] << endl;
        }
    }
}

C++: //AOJ 0200
//菴ソ縺?婿繧ゅｏ縺九ｉ縺ェ縺?¥縺帙↓include縺励∪縺上ｋ莠コ髢薙?繧ッ繧コ
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<stack>
#include<queue>
#include<vector>
#include<list>
#include<deque>
using namespace std;
#define INF 1 << 10
#define MAX_B 101

int a, b, i, j, k, money[MAX_B][MAX_B], time[MAX_B][MAX_B], n, m, c, d;
bool judge;
stack<int> left, right;


int main(){
  while(1){
    scanf("%d %d", &n, &m);
    if(n == 0 && m == 0) break;
    for(i = 1; i <= m; i++){
      for(j = 1; j <= m; j++){
	if(i == j){
	  money[i][j] = 0;
	  time[i][j] = 0;
	  continue;
	}
	money[i][j] = INF;
	time[i][j] = INF;
      }
    }
    for(i = 0; i < n; i++){
      scanf("%d %d %d %d", &a, &b, &c, &d);
      money[a][b] = c;
      money[b][a] = c;
      time[a][b] = d;
      time[b][a] = d;
    }
    for(i = 1; i <= m; i++){
      for(j = 1; j <= m; j++){
	for(k = 1; k <= m; k++){
	  if(money[j][k] > money[j][i] + money[i][k]) money[j][k] = money[j][i] + money[i][k];
	  if(time[j][k] > time[j][i] + time[i][k]) time[j][k] = time[j][i] + time[i][k];
	}
      }
    }
    scanf("%d", &a);
    for(i = 0; i < a; i++){
      scanf("%d %d %d", &b, &c, &d);
      if(d == 1) printf("%d\n", time[b][c]);
      else printf("%d\n", money[b][c]);
    }
  }
  return 0;
}