// chrono::system_clock::now().time_since_epoch().count()
#include "Annalib.h"
#include<bits/stdc++.h>
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
namespace {
int n, k, bad_pos[45];
int is_bad[150];
ll msg;
int bit(ll x, int p) {
if (p > 60) return 0;
return (x >> p) & 1;
}
void solve() {
assert(n % 2 == 0);
fill(is_bad, is_bad + n, 0);
for (int i = 0; i < k; ++i) {
is_bad[bad_pos[i]] = 1;
}
int ptr = 0;
for (int i = 0; i < n; i += 2) {
if (is_bad[i] || is_bad[i + 1]) {
Set(i, 0);
Set(i + 1, 0);
}
else {
Set(i, 1);
Set(i + 1, bit(msg, ptr++));
}
}
}
};
void Anna( int N, long long X, int K, int P[] ){
n = N;
msg = X;
k = K;
for (int i = 0; i < k; ++i) {
bad_pos[i] = P[i];
}
solve();
}
// chrono::system_clock::now().time_since_epoch().count()
#include "Brunolib.h"
#include<bits/stdc++.h>
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
namespace {
int n, arr[150];
ll solve() {
assert(n % 2 == 0);
ll ret = 0;
int ptr = 0;
for (int i = 0; i < n; i += 2) {
if (arr[i] == 0) {
continue;
}
if (arr[i + 1] == 1) {
ret += (1ll << ptr);
}
ptr++;
}
return ret;
}
};
long long Bruno( int N, int A[] ){
n = N;
for (int i = 0; i < n; ++i) {
arr[i] = A[i];
}
return solve();
}
