#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;

int n, m, u, d, l ,r, k, lines, cols, cells;

char ch;

int main()
{

    cin>>n>>m>>k;
    for(int i = 0; i < k; i++){

        cin>>ch;

        if(ch == 'U')
            lines--;

        if(ch == 'D')
            lines++;

        if(ch == 'L')
            cols--;

        if(ch == 'R')
            cols++;

        u = min(u, lines);
        d = max(d, lines);
        l = min(l, cols);
        d = max(d, cols);

    }

    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= m; j++)
            if(i + u >= 1 && i + d <= n && j + l >= 1 && j + r <= m)
                cells++;

    cout<<cells;

    return 0;
}