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 <stdio.h>
#include <vector>
#include <algorithm>
#include <math.h>
#include <queue>

using namespace std;

int main(){

	int start,goal,start_h,start_m,goal_h,goal_m,ans;
	int dist[8] = {0,0,6,13,18,23,43,58},toll[8][8];
	toll[1][1] = 0,toll[1][2] = 300,toll[1][3] = 500,toll[1][4] = 600,toll[1][5] = 700,toll[1][6] = 1350,toll[1][7] = 1650;
	toll[2][2] = 0,toll[2][3] = 350,toll[2][4] = 450,toll[2][5] = 600,toll[2][6] = 1150,toll[2][7] = 1500;
	toll[3][3] = 0,toll[3][4] = 250,toll[3][5] = 400,toll[3][6] = 1000,toll[3][7] = 1350;
	toll[4][4] = 0,toll[4][5] = 250,toll[4][6] = 850,toll[4][7] = 1300;
	toll[5][5] = 0,toll[5][6] = 600,toll[5][7] = 1150;
	toll[6][6] = 0,toll[6][7] = 500;

	while(true){
		scanf("%d",&start);
		if(start == 0)break;

		scanf("%d %d",&start_h,&start_m);

		scanf("%d",&goal);
		scanf("%d %d",&goal_h,&goal_m);

		ans = toll[start][goal];

		if(dist[goal]-dist[start] <= 40){
			if((start_h*60+start_m) >= 17*60+30 || (goal_h*60+goal_m) <= 19*60+30){
				ans /= 2;
				if(ans%50 > 0){
					while(ans % 50 == 0)ans++;
				}
			}
		}

		printf("%d\n",ans);

	}

    return 0;
}

C++: #include <iostream>
using namespace std;
int m[7][7][2] = {
  {{0,0},{6,300},{13,500},{18,600},{23,700},{43,1350},{58,1650}},
  {{6,300},{0,0},{7,350},{12,450},{17,600},{37,1150},{52,1500}},
  {{13,500},{7,350},{0,0},{5,250},{10,400},{30,1000},{45,1350}},
  {{18,600},{12,450},{5,250},{0,0},{5,250},{25,850},{40,1300}},
  {{23,700},{17,600},{10,400},{5,250},{0,0},{20,600},{35,1150}},
  {{43,1350},{37,1150},{30,1000},{25,850},{20,600},{0,0},{15,500}},
  {{58,1650},{52,1500},{45,1350},{40,1300},{35,1150},{15,500},{0,0}},
};
int main()
{
  int s,g,hs,ms,hg,mg,t,c;
  bool f;
  for(;;){
    cin >> s;
    if(s==0) break;
    cin >> hs >> ms;
    cin >> g;
    cin >> hg >> mg;
    f = false;
    t = hs * 60 + ms;
    if(1050<= t && t<=1170) f = true;
    t = hg * 60 + mg;
    if(1050<= t && t<=1170) f = true;
    if(m[s-1][g-1][0] > 40) f = false;
    c = m[s-1][g-1][1];
    if(f){
      c /= 2;
      if(c % 50 != 0) {
	c = c - (c % 50) + 50;
      }
    }
    cout << c << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<cmath>
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(){
	int inic, inh, inm, outic, outh, outm, yen, kyori;
	while(1){
		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 == 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 == 4) return 250;
		if(out == 5) return 400;
		if(out == 6) return 1000;
		if(out == 7) return 1350;
	} else if(in == 4){
		if(out == 5) return 250;
		if(out == 6) return 850;
		if(out == 7) return 1300;
	} else if(in == 5){
		if(out == 6) return 600;
		if(out == 7) return 1150;
	} else if(in == 6){
		if(out == 7) return 500;
	} else{
		cout <<"error!";
	}
}

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 == 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 == 4) return 5;
		if(out == 5) return 10;
		if(out == 6) return 30;
		if(out == 7) return 45;
	} else if(in == 4){
		if(out == 5) return 5;
		if(out == 6) return 25;
		if(out == 7) return 40;
	} else if(in == 5){
		if(out == 6) return 20;
		if(out == 7) return 35;
	} else if(in == 6){
		if(out == 7) return 15;
	} else{
		cout <<"error!";
	}
}

int checkhalf(int ih, int im, int oh, int om, int dis){
	int flag1 = 0, flag2 = 0;
	if(dis > 40) return 0;
	
	if(ih < 17 || (ih == 17 && im <= 30)){
		if(oh - 17 > 0 || (oh == 17 && om >= 30)){
			flag1 = 1;
		}
	}
	
	if(ih < 19 || (ih == 19 && im <= 30)){
		if(oh - 19 > 0 || (oh == 19 && om >= 30)){
			flag2 = 1;
		}
	}
	
	if((flag1 && flag2) || (!flag1 && !flag2)) return 0;
	else if((flag1 && !flag2) || (!flag1 && flag2)) return 1;
}

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