#include #include #define rep(i,b) for(int i=0;i=0;i--) #define rep1(i,b) for(int i=1;i using mpq = priority_queue, greater>; template bool chmax(T &a, const T &b) { if (a bool chmin(T &a, const T &b) { if (b ll sumv(const vector&a){ll res(0);for(auto&&x:a)res+=x;return res;} bool yn(bool a) { if(a) {cout << "Yes" << endl; return 1;} else {cout << "No" << endl; return 0;}} #define dame { cout << "No" << endl; return 0;} #define dame1 { cout << -1 << endl; return 0;} #define test(x) cout << "test" << x << endl; #define deb(x,y) cout << x << " " << y << endl; #define deb3(x,y,z) cout << x << " " << y << " " << z << endl; #define deb4(x,y,z,x2) cout << x << " " << y << " " << z << " " << x2 << endl; #define out cout << ans << endl; #define outv fore(yans , ans) cout << yans << "\n"; #define show(x) cerr<<#x<<" = "<; using pil = pair; using pli = pair; using pii = pair; using tp = tuple; using vi = vector; using vl = vector; using vs = vector; using vb = vector; using vpii = vector; using vpli = vector; using vpll = vector; using vpil = vector; using vvi = vector>; using vvl = vector>; using vvs = vector>; using vvb = vector>; using vvpii = vector>; using vvpli = vector>; using vvpll = vector; using vvpil = vector; using mint = modint998244353; using vm = vector; using vvm = vector>; vector dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1}; ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;} ll lcm(ll a, ll b) { return a/gcd(a,b)*b;} const double eps = 1e-10; const ll LINF = 1001002003004005006ll; const int INF = 1001001001; int main(){ int n; cin>>n; vl a(n); bool ok = true; rep(i,n){ cin>>a[i]; if (a[i] == 0) ok = false; } if (ok){ ll diff = a[1] - a[0]; ok = true; rep(i,n-1) if (a[i+1] - a[i] != diff) ok = false; yn(ok); return 0; } ll zero = 0;; sort(rng(a)); while(zero <= n-1 && a[zero] == 0) zero++; if (zero >= n-2){ cout << "Yes" << endl; return 0; } int l = zero; ll diffgcd; ok = true; repx(i,l,n-1){ ll tmp = a[i+1] - a[i]; if (tmp == 0) ok = false; if (i == l) diffgcd = tmp; else{ diffgcd = gcd(diffgcd , tmp); } } if (!ok){ ok = true; repx(i,l,n-1) if (a[i+1] != a[i]) ok = false; yn(ok); return 0; } ll cnt = 0; repx(i,l,n-1) cnt += ((a[i+1] - a[i]) / diffgcd) - 1; yn(cnt <= zero); return 0; }