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 <algorithm>
using namespace std;

int main(){
	int s,g,h,m,t,price;
	bool flag;
	int table[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   }
	};
	
	while(cin >> s && s){
		flag = false;
		cin >> h >> m ;
		t = h*60 + m;
		if(t >= 17*60+30 && t <= 19*60+30){
			flag = true;
		}
		
		cin >> g;
		
		cin >> h >> m ;
		t = h*60 + m;
		if(t >= 17*60+30 && t <= 19*60+30){
			flag = true;
		}
		s--;g--;
		if(g>s)swap(s,g);
		
		price = table[g][s];
		if(flag){
			price /=2;
			if(price%50){
				price = price - price%50 + 50;
			}
		}
		cout << price << endl;
	}
}

C++: #include <iostream>
#include <sstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <climits>
#include <cfloat>
using namespace std;

int main()
{
    int table[][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 a = 17 * 60 + 30;
    int b = 19 * 60 + 30;

    for(;;){
        int ic[2];
        bool half = false;
        for(int i=0; i<2; ++i){
            int h, m;
            cin >> ic[i] >> h >> m;
            if(ic[i] == 0)
                return 0;
            -- ic[i];

            m += h * 60;
            if(a <= m && m <= b)
                half = true;
        }

        if(table[ic[1]][ic[0]] <= 40)
            half &= true;

        if(half){
            int a = table[ic[0]][ic[1]];
            if(a % 100 != 0)
                a += 50;
            cout << (a / 2) << endl;
        }else{
            cout << table[ic[0]][ic[1]] << endl;
        }
    }
}

C++: #include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <functional>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <utility>
#include <sstream>
#include <complex>
#include <fstream>

using namespace std;

#define FOR(i,a,b) for(long long i=(a);i<(b);i++)
#define REP(i,N) for(long long i=0;i<(N);i++)
#define ALL(s) (s).begin(),(s).end()
#define fi first
#define se second

#define PI acos(-1.0)
#define INF 10e15+9
#define MOD 1000000007
#define EPS 1e-10
#define MAX_N 100100
#define MAX_M 100100

typedef long long ll;
typedef pair<ll, ll> P;
typedef pair<double, double> PD;
typedef pair<string, ll> PS;
typedef vector<ll> V;
typedef pair<P, char> PC;

int table[7][7] = {
	{ INF, 300, 500, 600, 700, 1350, 1650 },
	{ 6, INF, 350, 450, 600, 1150, 1500 },
	{ 13, 7, INF, 250, 400, 1000, 1350 },
	{ 18, 12, 5, INF, 250, 850, 1300 },
	{ 23, 17, 10, 5, INF, 600, 1150 },
	{ 43, 37, 30, 25, 20, INF, 500 },
	{ 58, 52, 45, 40, 35, 15, INF }
};

int dic, ric, h[10], m[10];

int main(){
	while (cin >> dic&&dic){
		cin >> h[0] >> m[0] >> ric >> h[1] >> m[1];
		dic--; ric--;
		int s = h[0] * 60 + m[0], e = h[1] * 60 + m[1];
		if ((s >= 17 * 60 + 30 && s <= 19 * 60 + 30)
			|| (e >= 17 * 60 + 30 && e <= 19 * 60 + 30)){
			if (table[ric][dic] <= 40){
				int num = table[dic][ric] / 2;
				if (num % 50 != 0){
					num += 25;
				}
				cout << num << endl;
			}
			else{
				cout << table[dic][ric] << endl;
			}
		}
		else{
			cout << table[dic][ric] << endl;
		}
	}
}

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;
}