#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; typedef long long ll; typedef unsigned int ui; const ll mod = 1000000007; const ll INF = (ll)1000000007 * 1000000007; typedef pair P; #define stop char nyaa;cin>>nyaa; #define rep(i,n) for(int i=0;i=0;i--) #define Rep(i,sta,n) for(int i=sta;i=sta;i--) #define rep1(i,n) for(int i=1;i<=n;i++) #define per1(i,n) for(int i=n;i>=1;i--) #define Rep1(i,sta,n) for(int i=sta;i<=n;i++) typedef long double ld; typedef complex Point; const ld eps = 1e-8; const ld pi = acos(-1.0); typedef pair LP; int grundy[1000010],Seg[1000010]; set se; void solve(){ int n,k; cin >> n >> k; Seg[0]=1; Rep(i,1,1000001){ se.insert(i); } Rep(i,1,1000001){ if(i-k-1>=0){ Seg[grundy[i-k-1]]--; if(Seg[grundy[i-k-1]]==0){ se.insert(grundy[i-k-1]); } } grundy[i]=*se.begin(); se.erase(grundy[i]); Seg[grundy[i]]+=1; } int ans=0; rep(i,n){ int a;cin >> a; ans^=a; } rep(i,20){ //cout << i << " " << grundy[i] << endl; } if(ans==0) cout << "NO" << endl; else cout << "YES" << endl; } int main(){ ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(50); solve(); }