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>
#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;
}

C++: #include <bits/stdc++.h>

using namespace std;
 
const int price[7][7] = {
    {-1, 300, 500, 600, 700, 1350, 1650},
    {-1, -1, 350, 450, 600, 1150, 1500},
    {-1, -1, -1, 250, 400, 1000, 1350},
    {-1, -1, -1, -1, 250, 850, 1300},
    {-1, -1, -1, -1, -1, 600, 1150},
    {-1, -1, -1, -1, -1, -1, 500}
};
 
const int dist[7][7] = {
    {-1, 6, 13, 18, 23, 43, 58},
    {-1, -1, 7, 12, 17, 37, 52},
    {-1, -1, -1, 5, 10, 30, 45},
    {-1, -1, -1, -1, 5, 25, 40},
    {-1, -1, -1, -1, -1, 20, 35},
    {-1, -1, -1, -1, -1, -1, 15}
};
 
int _start = 17*60 + 30, _end = 19*60 + 30;
 
int main()
{
    int sIC, sh, sm, tIC, th, tm;
 
    while (scanf("%d", &sIC) ,sIC) {
	scanf("%d%d", &sh ,&sm);
	scanf("%d%d%d", &tIC ,&th ,&tm);
 
	sIC--; tIC--;
	bool ok1 = 0, ok2 = 0;
	int ssum = sh*60 + sm, tsum = th*60 + tm;
 
	if ((_start <= ssum && ssum <= _end) ||
	   (_start <= tsum && tsum <= _end)) ok1 = 1;
 
	if (dist[sIC][tIC] <= 40) ok2 = 1;
  
	int ans = price[sIC][tIC];
	if (ok1 && ok2) {
	    ans = (ans / 50 + 1) / 2;
	    ans *= 50;
	}
	printf("%d\n" ,ans);
    }
    return 0;
}

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

int l[7]={0,6,13,18,23,43,58};
int co[7][7]={
	0,300,500,600,700,1350,1600,
	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,
	1600,1500,1350,1300,1150,500,0
};
int main(void){
	int s[2],h[2],m[2];
	int f[2];
	int ans;
	while(1){
		scanf("%d",&s[0]);
		if(s[0]==0)break;
		scanf("%d%d",&h[0],&m[0]);
		scanf("%d",&s[1]);
		scanf("%d%d",&h[1],&m[1]);
		for(int i=0;i<2;i++){
			if(h[i]<17 || h[i]==17 && m[i]<=30)f[i]=0;
			else if(h[i]<19 || h[i]==19 && m[i]<=30)f[i]=1;
			else f[i]=2;
		}
		ans=co[s[0]-1][s[1]-1];
		if((f[0]==1 || f[1]==1) && abs(l[s[1]-1]-l[s[0]-1])<=40)ans=abs(co[s[0]-1][s[1]-1]+50)/100*50;
		printf("%d\n",ans);
	}
    return 0;
}

C++: #include<iostream>
using namespace std;
int s[7][7]={{0,300,500,600,700,1350,1650},
	     {6,0,350,450,600,1150,1500},
	     {13,7,0,250,400,1000,1350},
	     {18,12,5,0,250,850,1300},
	     {23,17,10,5,0,600,1150},
	     {43,37,30,25,20,0,500},
	     {58,52,45,40,35,15,0}};

int main(){
  int sc,sh,sm,ec,eh,em; 
  while(cin>>sc&&sc){
    cin>>sh>>sm>>ec>>eh>>em;
    int an=s[sc-1][ec-1],S=sh*100+sm,E=eh*100+em;
    if(S>E)E+=2400;
    if(s[ec-1][sc-1]<=40&&
       ((1930<S&&E<=1730+2400&&E<1930+2400)||
	(S<=1730&&1730<=E&&E<1930)||
	(1730<S&&S<=1930&&1930<=E&&E<1730+2400)))an/=2;
    if(an%50)an-=an%50,an+=50;
    cout<<an<<endl;
  }
  return 0;
}