Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func main() {
	distance_table := [][]int{
		{0, 6, 13, 18, 23, 43, 58},
		{6, 0, 7, 12, 17, 37, 52},
		{13, 7, 0, 5, 10, 30, 45},
		{18, 12, 5, 0, 5, 25, 40},
		{23, 17, 10, 5, 0, 20, 35},
		{43, 37, 30, 25, 20, 0, 15},
		{58, 52, 45, 40, 35, 15, 0},
	}
	toll_table := [][]int{
		{0, 300, 500, 600, 700, 1350, 1650},
		{300, 0, 350, 450, 600, 1150, 1500},
		{500, 350, 0, 250, 400, 1000, 1350},
		{600, 450, 250, 0, 250, 850, 1300},
		{700, 600, 400, 250, 0, 600, 1150},
		{1350, 1150, 1000, 850, 600, 0, 500},
		{1650, 1500, 1350, 1300, 1150, 500, 0},
	}
	for scanner.Scan() {
		d, _ := strconv.Atoi(scanner.Text())
		if d == 0 {
			break
		}
		d--
		scanner.Scan()
		dbuf := strings.Split(scanner.Text(), " ")
		dh, _ := strconv.Atoi(dbuf[0])
		dm, _ := strconv.Atoi(dbuf[1])
		dtime := 100*dh+dm
		scanner.Scan()
		a, _ := strconv.Atoi(scanner.Text())
		a--
		scanner.Scan()
		abuf := strings.Split(scanner.Text(), " ")
		ah, _ := strconv.Atoi(abuf[0])
		am, _ := strconv.Atoi(abuf[1])
		atime := 100*ah+am
		toll := toll_table[d][a]
		if distance_table[d][a] <= 40 &&
			1730 <= dtime && dtime <= 1930 ||
			1730 <= atime && atime <= 1930 {
				toll = ((toll/2-1)/50+1)*50
		}
		fmt.Println(toll)
	}
}

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

int abs(int i)
{
  return ( i < 0 ? -i : i );
}
int km_to_yen(int km)
{
  switch(km)
  {
  case 5:
    return 250;
  case 6:
    return 300;
  case 7:
    return 350;
  case 10:
    return 400;
  case 12:
    return 450;
  case 13:
  case 15:
    return 500;
  case 17:
  case 18:
  case 20:
    return 600;
  case 23:
    return 700;
  case 25:
    return 850;
  case 30:
    return 1000;
  case 35:
  case 37:
    return 1150;
  case 40:
    return 1300;
  case 43:
  case 45:
    return 1350;
  case 52:
    return 1500;
  case 58:
    return 1650;
  }
}

int main()
{
  int ic_km[8] = { 0, 0, 6, 13, 18, 23, 43, 58, };
  while (true)
  {
    int from_num;
    int from_hour, from_min;
    cin >> from_num;
    if ( from_num == 0 ) break;
    cin >> from_hour >> from_min;
    int from_time = from_hour*100 + from_min;
    int to_num;
    int to_hour, to_min;
    cin >> to_num;
    cin >> to_hour >> to_min;
    int to_time = to_hour*100 + to_min;

    int km_diff = abs(ic_km[to_num] - ic_km[from_num]);
    int fare = km_to_yen(km_diff);
    if ( ( 1730 <= from_time && from_time <= 1930 ) ||
         ( 1730 <= to_time   && to_time   <= 1930 ) )
    {
      fare /= 2;
      if ( fare % 50 != 0 )
      {
        fare = ( fare / 50 + 1 ) * 50;
      }
    }
    cout << fare << endl;
  }
}

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

int main(){

    int dist[8] = {0, 0, 6, 13, 18, 23, 43, 58};
    int fee[8][8] = {};
    fee[1][2] = 300;    fee[2][3] = 350;    fee[3][4] = 250;    fee[4][5] = 250;    fee[5][6] = 600;    fee[6][7] = 500;
    fee[1][3] = 500;    fee[2][4] = 450;    fee[3][5] = 400;    fee[4][6] = 850;    fee[5][7] = 1150;
    fee[1][4] = 600;    fee[2][5] = 600;    fee[3][6] = 1000;   fee[4][7] = 1300;   
    fee[1][5] = 700;    fee[2][6] = 1150;   fee[3][7] = 1350;   
    fee[1][6] = 1350;   fee[2][7] = 1500;   
    fee[1][7] = 1650;   
    int d, hd, md, a, ha, ma;
    while(1){
        cin >> d;
        if(d == 0)  break;
        cin >> hd >> md >> a >> ha >> ma;
        hd = hd*100 + md;
        ha = ha*100 + ma;
        
        int distance = dist[a] - dist[d];
        int ans = fee[d][a];
        if(distance <= 40){
            if((1730 <= hd && hd <= 1930) || (1730 <= ha && ha <= 1930)){
                ans /= 2;
                ans = (ans % 50 == 0) ? ans : (ans/50+1)*50; 
            }
        }

        cout << ans << endl;
    }
    return 0;
}

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

int charge(int in, int out);
int dist(int in, int out);
int checkhalf(int ih, int im, int oh, int om, int dis);
int half(int y);

int main(){
	while(1){
		int inic, inh, inm, outic, outh, outm, yen, kyori;
		cin >>inic;
		if(inic == 0) break;
		cin >>inh >>inm >>outic >>outh >>outm;
		
		yen = charge(inic, outic);
		kyori = dist(inic, outic);
		if(checkhalf(inh, inm, outh, outm, kyori)) yen = half(yen);
		
		cout <<yen <<endl;
	}
	return 0;
}

int charge(int in, int out){
	if(in == 1){
		if(out == 2) return 300;
		if(out == 3) return 500;
		if(out == 4) return 600;
		if(out == 5) return 700;
		if(out == 6) return 1350;
		if(out == 7) return 1650;
	} else if(in == 2){
		if(out == 1) return 300;
		if(out == 3) return 350;
		if(out == 4) return 450;
		if(out == 5) return 600;
		if(out == 6) return 1150;
		if(out == 7) return 1500;
	} else if(in == 3){
		if(out == 1) return 500;
		if(out == 2) return 350;
		if(out == 4) return 250;
		if(out == 5) return 400;
		if(out == 6) return 1000;
		if(out == 7) return 1350;
	} else if(in == 4){
		if(out == 1) return 600;
		if(out == 2) return 450;
		if(out == 3) return 250;
		if(out == 5) return 250;
		if(out == 6) return 850;
		if(out == 7) return 1300;
	} else if(in == 5){
		if(out == 1) return 700;
		if(out == 2) return 600;
		if(out == 3) return 400;
		if(out == 4) return 250;
		if(out == 6) return 600;
		if(out == 7) return 1150;
	} else if(in == 6){
		if(out == 1) return 1350;
		if(out == 2) return 1150;
		if(out == 3) return 1000;
		if(out == 4) return 850;
		if(out == 5) return 600;
		if(out == 7) return 500;
	} else if(in == 7){
		if(out == 1) return 1650;
		if(out == 2) return 1500;
		if(out == 3) return 1350;
		if(out == 4) return 1300;
		if(out == 5) return 1150;
		if(out == 6) return 500;
	}
}

int dist(int in, int out){
	if(in == 1){
		if(out == 2) return 6;
		if(out == 3) return 13;
		if(out == 4) return 18;
		if(out == 5) return 23;
		if(out == 6) return 43;
		if(out == 7) return 58;
	} else if(in == 2){
		if(out == 1) return 6;
		if(out == 3) return 7;
		if(out == 4) return 12;
		if(out == 5) return 17;
		if(out == 6) return 37;
		if(out == 7) return 52;
	} else if(in == 3){
		if(out == 1) return 13;
		if(out == 2) return 7;
		if(out == 4) return 5;
		if(out == 5) return 10;
		if(out == 6) return 30;
		if(out == 7) return 45;
	} else if(in == 4){
		if(out == 1) return 18;
		if(out == 2) return 12;
		if(out == 3) return 5;
		if(out == 5) return 5;
		if(out == 6) return 25;
		if(out == 7) return 40;
	} else if(in == 5){
		if(out == 1) return 23;
		if(out == 2) return 17;
		if(out == 3) return 10;
		if(out == 4) return 5;
		if(out == 6) return 20;
		if(out == 7) return 35;
	} else if(in == 6){
		if(out == 1) return 43;
		if(out == 2) return 37;
		if(out == 3) return 30;
		if(out == 4) return 25;
		if(out == 5) return 20;
		if(out == 7) return 15;
	} else if(in == 7){
		if(out == 1) return 58;
		if(out == 2) return 52;
		if(out == 3) return 45;
		if(out == 4) return 40;
		if(out == 5) return 35;
		if(out == 6) return 15;
	}
}

int checkhalf(int ih, int im, int oh, int om, int dis){
	int flag = 0;
	if(dis > 40){	//s£ª40kmæè·¢
		return 0;
	}
	
	if(ih > oh || (ih == oh && im > om)){	//úðÜ½¢¾
		if((ih > 17 || (ih == 17 && im >= 30)) && (ih < 19 || (ih == 19 && im <= 30))){
			if(oh < 17 || (oh == 17 && om < 30)){
				return 1;
			}
		} else{
			return 0;
		}
		if(ih > 19 || (ih == 19 && im > 30)){
			if((oh > 17 || (oh == 17 && om >= 30)) && (oh < 19 || (oh == 19 && om <= 30))){
				return 1;
			}
		} else{
			return 0;
		}
	}
	
	if((ih < 17 || (ih == 17 && im <= 30)) && (oh < 19 || (oh == 19 && om < 30))){	//17æèO©A1730ªÈOÉüèA19æèO©A1930ªæèOÉo½
		flag = 1;
	}
	if((ih > 17 || (ih == 17 && im > 30)) && (oh > 19 || (oh == 19 && om >= 30))){	//17æèã©A1730ªæèãÉüèA19æèã©A1930ªÈ~Éo½
		flag = 1;
	}
	if(ih == oh && im == om && flag){	//flagª1ÅAüéÔÆoéÔª¯¶¾Á½
		flag = 0;
	}
	return flag;
}

int half(int y){
	int temp = y;
	
	temp /= 2;
	if(temp % 50 != 0){
		temp = temp + abs((temp % 50) - 50);
	}
	
	return temp;
}