#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mod = 998244353;
const int MAXN = 2e5 + 5;
int n, m, k;
ll a[MAXN];
int read() {
    int res = 0, f = 1;
    char ch = getchar();
    while (ch < '0' || ch > '9') {
        f = -1;
        ch = getchar();
    }
    while (ch >= '0' && ch <= '9') {
        res = (res << 1) + (res << 3) + (ch ^ 48);
        ch = getchar();
    }
    return res * f;
}
namespace subtask5 {
void main() {
    if (m == 0)
        cout << 1 << endl;
    else
        cout << 0 << endl;
    return;
}
}  // namespace subtask5
namespace subtask3 {
void main() {
    if (k > 0)
        cout << 1 << endl;
    else
        cout << 0 << endl;
    return;
}
}  // namespace subtask3
namespace subtask4 {
void main() {
    if (k == 1)
        cout << 1 << endl;
    else if (k == 2)
        cout << (n / 2) - 1 << endl;
    else
        cout << n / 2 << endl;
}
}  // namespace subtask4
int main() {
    n = read();
    m = read();
    k = read();
    if (m == 0) {
        subtask3::main();
        return 0;
    }
    if (m == 2) {
        subtask4::main();
        return 0;
    }
    if (k == 1) {
        subtask5::main();
        return 0;
    }
    return 0;
}