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 <fstream>	// require freopen

using namespace std;

int main()
{
	int price[][7] = { 
			{   0, 300, 500, 600, 700,1350,1650 },
			{   0,   0, 350, 450, 600,1150,1500 },
			{   0,   0,   0, 250, 400,1000,1350 },
			{   0,   0,   0,   0, 250, 850,1300 },
			{   0,   0,   0,   0,   0, 600,1150 },
			{   0,   0,   0,   0,   0,   0, 500 },
			{   0,   0,   0,   0,   0,   0,   0 } };
	int dist[][7] = {
			{   0,   0,   0,   0,   0,   0,   0 },
			{   6,   0,   0,   0,   0,   0,   0 },
			{  13,   7,   0,   0,   0,   0,   0 },
			{  18,  12,   5,   0,   0,   0,   0 },
			{  23,  17,  10,   5,   0,   0,   0 },
			{  43,  37,  30,  25,  20,   0,   0 },
			{  58,  52,  45,  40,  35,  15,   0 } };

	for (int i = 0; i < 7; ++i ){
		for (int j = 0; j < 7; ++j ){
			if (i != j ){
				if (price[i][j] == 0 ){
						price[i][j] = price[j][i];
				} // end if
				if (dist[i][j] == 0 ){
					dist[i][j] = dist[j][i];
				} // end if
			} // end if
		} // en for
	} // end for

//	cut here before submit 
//	freopen ("testcase.highwaytoll", "r", stdin );
	int from;

	while (cin >> from && from ){
		int fromh, fromm;
		cin >> fromh >> fromm;
		int to,toh, tom;
		cin >> to >> toh >> tom;
		from--;to--;
		int res = 0;
		int em = fromh*60 + fromm;
		int dm = toh*60 + tom;

		// ツ環暗クツ妥篠湘崢づ個篠楪甘板妥堕づづ債づ按つ「
		if ( (17*60 + 30 <= em && em <= 19*60 + 30 ) 
		||   (17*60 + 30 <= dm && dm <= 19*60 + 30 ) ){ 
			int d = dist[from][to];
			if (d > 40 ){
				res = price[from][to];
			}else{
				res = (price[from][to]/2 + 49)/50*50;
			} // end if
 		}else{
				res = price[from][to];
		} // end if

		cout << res << endl;	
	} // end loop
		
	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))){	//üÁ½Ôª¼zÍÍàÅ
			if(oh < 17 || (oh == 17 && om < 30)){	//o½ÔªúðÜ½¢Å¼zÍÍO¾Á½
				return 1;
			}
		} else{
			return 0;
		}
		if(ih > 19 || (ih == 19 && im > 30)){	//üÁ½Ôª¼zÍÍæèàãÅ
			if((oh > 17 || (oh == 17 && om >= 30)) && (oh < 19 || (oh == 19 && om <= 30))){	//o½ÔªúðÜ½¢Å¼zÍÍà¾Á½
				return 1;
			}
		} else{
			return 0;
		}
	}*/
	
	if((ih < 17 || (ih == 17 && im <= 30)) && (oh < 19 || (oh == 19 && om < 30)) && (oh > 17 || (oh == 17 && om >= 30))){	//17æèO©1730ªÈOÉüèA19æèO©1930ªæèOÉo½
		flag = 1;
	} else if((ih > 17 || (ih == 17 && im > 30)) && (ih < 19 || (ih == 19 && im <= 30)) && (oh > 19 || (oh == 19 && om >= 30))){	//àµ­ÍA17æèã©1730ªæèãÉüèA19æèã©19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;
}