#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second
const int nmax = 100005;
int n, nr, k, P, m, mlc;
char *p, a[nmax], s[nmax];
int e(), t(), f();
int main() {
cin.sync_with_stdio(false);
cin >> a;
n = strlen(a);
cin >> P >> m;
for (int i = 0; i < n; i++) {
if (a[i] == 'x'){
s[i] = '0';
}
else{
s[i] = a[i];
}
}
p = s;
nr = e();
for (int i = 0; i < n; i++) {
if (a[i] == 'x')
s[i] = '1';
else
s[i] = a[i];
}
p = s;
k = (e() - nr + m) % m;
mlc = (P - nr % m + m) % m;
for (int i = 1; i <= m; i++)
if ((1LL * k * i) % m == mlc) {
cout << i;
return 0;
}
return 0;
}
int e() {
int r = t();
while (*p == '+' || *p == '-') {
if (*p == '+')
p++, r = (r + t()) % m;
else
p++, r = (r - t() + m) % m;
}
return r;
}
int t() {
int r = f();
while (*p == '*') {
p++, r = (1LL * r * f()) % m;
}
return r;
}
int f() {
int r = 0;
if (*p == '(') {
p++;
r = e();
p++;
return r;
}
while (*p >= '0' && *p <= '9') {
r = (r * 10 + *p - '0') % m, p++;
}
return r;
}
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