Monocycle/김상섭

~cpp
#include <iostream>
#include <string>
#include <list>
using namespace std;

#define Max 25

#define north 0
#define east 1
#define south 2
#define west 3

#define right 1
#define left -1

#define Max_turn 3

#define Direction 4

int now_row, now_col, terminal_row, terminal_col;
bool table[Max][Max];
int direction_row[4] = {-1,0 , 1,0 };
int direction_col[4] = {0,1 ,0 ,-1 };

struct state
{
	int row;
	int col;
	int direction;
	int length;	
	int time;
	int turn_num;
	int pre_turn;
};

void init(int M, int N)
{
	int i, j;
	string temp;
	
	for(i = 0; i < M; i++)
	{
		for(j = 0; j < N; j++)
			table[i][j] = false;
	}
	
	for(i = 0; i < M; i++)
	{
		cin >> temp;		
		for(j = 0; j < N; j++)
		{
			if(temp[j] == '.')
				table[i][j]	= true;
			if(temp[j] == 'S')
			{
				table[i][j]	= true;
				now_row = i;
				now_col = j;
			}
			if(temp[j] == 'T')
			{
				table[i][j]	= true;
				terminal_row = i;
				terminal_row = j;
			}
		}
	}
}

int length(int M, int N)
{
	
	state now = {now_row,now_col, 0, 0, 0, 0, 0}, next;
	list<state> test;
	
	int a =5;
	cout << a;
	while(now.row != terminal_row || now.col != terminal_col || now.length%5 != 0)
	{
		next = now;
		next.row += direction_row[next.direction];
		next.col += direction_col[next.direction];
		next.time++;
		next.length++;
		next.pre_turn = next.turn_num = NULL;
		if(next.row >= 0 && next.row < M && next.col >= 0 && next.col < N && table[next.row][next.col] )
			test.push_back(next);	
		
		next = now;
		if(next.turn_num < Max_turn)
		{
			if(next.pre_turn == right)
			{
				next.turn_num++;
				next.time++;
				next.direction = (next.direction + right)%Direction;
				test.push_back(next);
			}
			else if(next.pre_turn == left)
			{
				next.turn_num++;
				next.time++;
				next.direction = (next.direction + left)%Direction;
				test.push_back(next);
			}
			else if(next.pre_turn == NULL)
			{
				next.turn_num++;
				next.time++;
				next.pre_turn = right;
				next.direction = (next.direction + right)% Direction;
				test.push_back(next);
				next.pre_turn = left;
				next.direction = (next.direction + 2*left)% Direction;
				test.push_back(next);
			}
		}	
		
		now = test.front();
		test.pop_front();
	}
	
	return now.length;
}

void process(int M, int N)
{
	init(M,N);
	int a = 10;
	
	
	for(int i = 0; i < M; i++)
	{
		for(int j = 0; j < N; j++)
			cout <<table[i][j];
		cout << endl;
	}
	
	cout << length(M,N) << endl;;
	
}

int main()
{
	int M, N;
	
	cin >> M >> N;
	
	while(M != 0 || N != 0)
	{
		process(M,N);
		cin >> M >> N;
	}
	
	return 0;
}