OJ-Problems-Source/HDOJ/1620_autoAC.cpp

#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
#define MAXN 55
#define DANGEROUS 0
#define SAFE 1
struct status
{
    int x, y;
    string direction;
};
int grid[MAXN][MAXN], width, height;
bool move(status & s, string instructions)
{
    status last;
    for (int i = 0; i < instructions.length(); i++)
    {
        last = s;
        if (s.direction == "N" && instructions[i] == 'L')
            s.direction = "W";
        else if (s.direction == "N" && instructions[i] == 'R')
            s.direction = "E";
        else if (s.direction == "N" && instructions[i] == 'F')
            s.y += 1;
        else if (s.direction == "S" && instructions[i] == 'L')
            s.direction = "E";
        else if (s.direction == "S" && instructions[i] == 'R')
            s.direction = "W";
        else if (s.direction == "S" && instructions[i] == 'F')
            s.y -= 1;
        else if (s.direction == "W" && instructions[i] == 'L')
            s.direction = "S";
        else if (s.direction == "W" && instructions[i] == 'R')
            s.direction = "N";
        else if (s.direction == "W" && instructions[i] == 'F')
            s.x -= 1;
        else if (s.direction == "E" && instructions[i] == 'L')
            s.direction = "N";
        else if (s.direction == "E" && instructions[i] == 'R')
            s.direction = "S";
        else if (s.direction == "E" && instructions[i] == 'F')
            s.x += 1;
        if (s.x > width || s.x < 0 || s.y > height || s.y < 0)
        {
            if (grid[last.y][last.x] == DANGEROUS)
                s = last;
            else
            {
                cout << last.x << " " << last.y << " " << last.
                    direction;
                cout << " LOST" << endl;
                grid[last.y][last.x] = DANGEROUS;
                return true;
            }
        }
    }
    cout << s.x << " " << s.y << " " << s.direction << endl;
    return false;
}
int main(int argc, char const *argv[])
{
    status robot;
    string line;
    cin >> width >> height;
    for (int i = 0; i <= height; i++)
        for (int j = 0; j <= width; j++)
            grid[i][j] = SAFE;
    while (cin >> robot.x >> robot.y >> robot.direction)
    {
        cin >> line;
        move(robot, line);
    }
    return 0;
}