`#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    int N, C, P;

    if (scanf("%d %d %d", &N, &C, &P) != 3) {
        printf("Invalid input");
        return 0;
    }
    if (N < 10 || N > 200 || C < 1 || C > 20 || P < 1 || P > N) {
        printf("Invalid input");
        return 0;
    }

    char names[210][50]; 
    for (int i = 0; i < N; i++) {
        if (scanf("%s", names[i]) != 1) {
            printf("Invalid input");
            return 0;
        }
    }
    int round = (P + C - 1) / C;

    printf("%d", round);
    return 0;
}