#include<cstdio>
#include<cstring>
#include<set>
#include<queue>
#include<vector>
#include<algorithm>
#include<cstdlib>
#include<ctime>
using namespace std;
int x,y,i,j,sol,n,m,k,minx,miny,maxx,maxy;
char sir[1000009];
int main()
{
//freopen("input","r",stdin);
//freopen("output","w",stdout);
scanf("%d",&n);
scanf("%d",&m);
scanf("%d\n",&k);
gets(sir+1);
x=y=0;
for(i=1;i<=k;i++)
{
    if(sir[i]=='L') y--;
    else
    if(sir[i]=='R') y++;
    else
    if(sir[i]=='U') x--;
    else x++;
    if(x<minx) minx=x;
    if(y>maxy) maxy=y;
    if(y<miny) miny=y;
    if(x>maxx) maxx=x;
}
for(i=1;i<=n;i++)
    for(j=1;j<=m;j++)
        if(i+maxx<=n&&i+minx>=1&&j+maxy<=m&&j+miny>=1) sol++;
printf("%d\n",sol);
return 0;
}