#include using namespace std; #define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++) #define ALL(v) (v).begin(),(v).end() using ll=long long int; const int inf = 0x3fffffff; const ll INF = 0x1fffffffffffffff; const double eps=1e-12; templateinline bool chmax(T& a,T b){if(ainline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;} int main(){ int n,m; cin>>n>>m; vector a(n); rep(i,0,n)cin>>a[i]; sort(ALL(a)); a.erase(unique(ALL(a)),a.end()); int mx=a.size(),mn=0; if(n==m and a.size()==1)mn=1; cout<