Codeforces Round #335 (Div. 2) B.Testing Robots

B. Testing Robots

time limit per test

2 seconds

memory limit per test

256 megabytes

input

standard input

output

standard output

The Cybernetics Failures (CF) organisation made a prototype of a bomb technician robot. To find the possible problems it was decided to carry out a series of tests. At the beginning of each test the robot prototype will be placed in cell(x₀, y₀) of a rectangular squared field of sizex × y, after that a mine will be installed into one of the squares of the field. It is supposed to conduct exactlyx·y tests, each time a mine is installed into a square that has never been used before. The starting cell of the robot always remains the same.

After placing the objects on the field the robot will have to run a sequence of commands given by strings, consisting only of characters 'L', 'R', 'U', 'D'. These commands tell the robot to move one square to the left, to the right, up or down, or stay idle if moving in the given direction is impossible. As soon as the robot fulfills all the sequence of commands, it will blow up due to a bug in the code. But if at some moment of time the robot is at the same square with the mine, it will also blow up, but not due to a bug in the code.

Moving to the left decreases coordinate y, and moving to the right increases it. Similarly, moving up decreases thex coordinate, and moving down increases it.

The tests can go on for very long, so your task is to predict their results. For eachk from 0 to length(s) your task is to find in how many tests the robot will run exactlyk commands before it blows up.

Input

The first line of the input contains four integers x,y, x₀,y₀ (1 ≤ x, y ≤ 500, 1 ≤ x₀ ≤ x, 1 ≤ y₀ ≤ y) — the sizes of the field and the starting coordinates of the robot. The coordinate axisX is directed downwards and axis Y is directed to the right.

The second line contains a sequence of commands s, which should be fulfilled by the robot. It has length from1 to 100 000 characters and only consists of characters 'L', 'R', 'U', 'D'.

Output

Print the sequence consisting of (length(s) + 1) numbers. On thek-th position, starting with zero, print the number of tests where the robot will run exactlyk commands before it blows up.

Sample test(s)

Input

3 4 2 2UURDRDRL

Output

1 1 0 1 1 1 1 0 6

Input

2 2 2 2ULD

Output

1 1 1 1

Note

In the first sample, if we exclude the probable impact of the mines, the robot's route will look like that:.

题意：机器人碰到矿石会爆炸，走完命令s也会爆炸，在n*m的方格里放矿石，每个格子只放一次，每次机器人的起点的命令s都一样。输出机器人刚好走完k步后就爆炸的情况数（0<=k<=strlen(s)）。

思路：只有矿石刚好放在机器人第k步的位置或者当k=命令行长度+1时，机器人就会爆炸（当k=strlen(s)+1时，机器人走完命令自动爆炸，与矿石位置无关）

#include <stdio.h>#include <string.h>#define maxn 100005char op[maxn];int ans [maxn], Map[505][505];int main(){    int n, m, ex, ey, i;    scanf("%d %d %d %d", &n, &m, &ex, &ey);    scanf("%s", op);    int len = strlen(op);    ans[len] = n * m;    for(i = 0;i < len;i++)    {        //printf("%d %d %c\n", ex, ey, op[i]);        if(Map[ex][ey] == 0)        {            ans[len]--;            ans[i] = 1;            Map[ex][ey] = 1;        }else ans[i] = 0;        if(op[i] == 'U'){            if(ex > 1)                ex--;        }        else if(op[i] == 'D'){            if(ex < n)                ex++;        }        else if(op[i] == 'L'){            if(ey > 1)                ey--;        }        else if(op[i] == 'R'){            if(ey < m)                ey++;               // printf("---\n");        }    }    for(i = 0;i <= len;i++)        printf("%d%c", ans[i], i<len?' ':'\n');}