#include <bits/stdc++.h>
using namespace std;
namespace io {
const int SI = 1 << 21 | 1;
char IB[SI], *IS, *IT, OB[SI], *OS = OB, *OT = OS + SI - 1, c, ch[100];
int f, t;
inline void flush() { fwrite(OB, 1, OS - OB, stdout), OS = OB; }
inline void pc(char x) {
  *OS++ = x;
  if (OS == OT) flush();
}
template <class I>
inline void rd(I &x) {
  for (f = 1, c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                              IS == IT ? EOF : *IS++)
                            : *IS++);
       c < '0' || c > '9';
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    if (c == '-') f = -1;
  for (x = 0; c >= '0' && c <= '9'; x = (x << 3) + (x << 1) + (c & 15),
      c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                      IS == IT ? EOF : *IS++)
                    : *IS++))
    ;
  x *= f;
}
template <class I>
inline void rd(I &x, I &y) {
  rd(x), rd(y);
}
template <class I>
inline void rd(I &x, I &y, I &z) {
  rd(x), rd(y), rd(z);
}
template <class I>
inline void rda(I *a, int n) {
  for (int i = 1; i <= n; i++) rd(a[i]);
}
inline void rdc(char &c) {
  for (c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++);
       c < 33 || c > 126;
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    ;
}
inline void rds(char *s, int &n) {
  for (c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++);
       c < 33 || c > 126;
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    ;
  for (n = 0; c >= 33 && c <= 126;
       s[++n] = c, c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                                   IS == IT ? EOF : *IS++)
                                 : *IS++))
    ;
  s[n + 1] = '\0';
}
inline void rds(string &s) {
  for (c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++);
       c < 33 || c > 126;
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    ;
  for (s.clear(); c >= 33 && c <= 126;
       s.push_back(c),
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    ;
}
template <class I>
inline void print(I x, char k = '\n') {
  if (!x) pc('0');
  if (x < 0) pc('-'), x = -x;
  while (x) ch[++t] = x % 10 + '0', x /= 10;
  while (t) pc(ch[t--]);
  pc(k);
}
template <class I>
inline void print(I x, I y) {
  print(x, ' '), print(y);
}
template <class I>
inline void print(I x, I y, I z) {
  print(x, ' '), print(y, ' '), print(z);
}
template <class I>
inline void printa(I *a, int n) {
  for (int i = 1; i <= n; i++) print(a[i], " \n"[i == n]);
}
inline void printc(char c) { pc(c); }
inline void prints(char *s, int n) {
  for (int i = 1; i <= n; i++) pc(s[i]);
  pc('\n');
}
inline void prints(string s) {
  int n = s.length();
  while (t < n) pc(s[t++]);
  pc('\n'), t = 0;
}
struct Flush {
  ~Flush() { flush(); }
} flusher;
}  // namespace io
using io::print;
using io::printa;
using io::printc;
using io::prints;
using io::rd;
using io::rda;
using io::rdc;
using io::rds;
const int N = 1e5 + 7;
int n, a[N];
int main() {
  rd(n), rda(a, n);
  if (n % 3) return prints("No"), 0;
  map<int, int> c;
  for (int i = 1; i <= n; i++) ++c[a[i]];
  for (pair<int, int> o : c)
    if (3 * o.second != n) return prints("No"), 0;
  prints("Yes");
  return 0;
}
