#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

	short n, m, k;
    cin >> n >> m >> k;

    string commands;
    cin >> commands;

    short commandN = commands.length();

    map<char, pair<short, short>> directions = {
        {'R', make_pair(1, 0)},
        {'D', make_pair(0, 1)},
        {'L', make_pair(-1, 0)},
        {'U', make_pair(0, -1)}
    };
    
    bool hasEncountered[100][100] = { false };

    hasEncountered[0][0] = true;

    short res = 0;
    short x = 0;
    short y = 0;
    short remaining = n * m - 1;

    while(remaining >= k && res < commandN) {
        pair<short, short> curr = directions[commands[res]];
        x += curr.first;
        y += curr.second;

        if (!hasEncountered[y][x]) {
            hasEncountered[y][x] = true;
            remaining--;
        }

        res++;
    }

    if (remaining < k) {
        res--;
    }

    cout << res;
}