#include <bits/stdc++.h>
using namespace std;
#define all(v) v.begin(), v.end()
#define yes cout << "Yes" << "\n"
#define no cout << "No" << "\n"
#define pb push_back
#define F first
#define S second
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair <int, int> pii;
typedef vector <pii> vii;
typedef vector <ll> vi;
typedef vector <vi> vvi;
template<typename T>
void read(vector<T>& v) {
for (auto &x : v) cin >> x;
}
template<typename T>
void print(const vector<T>& v) {
for (auto &x : v) cout << x << ' ';
cout << "\n";
}
const ll MAX = 1e6 + 5;
const ll MOD = 1e9 + 7;
void solve() {
int h, w;
cin >> h >> w;
set <char> st;
for (int i = 1; i <= h; i++) {
for (int j = 1; j <= w; j++) {
char d;
cin >> d;
st.insert(d);
}
}
if (st.size() == 1) {
cout << 1 << "\n";
}
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
//cin >> t;
for (int i = 1; i <= t; i++) {
solve();
}
}
