Language: C++

4
1 2 4 84
1 2 4 8#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < int(n); i++)
#define rrep(i, n) for (int i = int(n) - 1; i >= 0; i--)
#define reps(i, n) for (int i = 1; i <= int(n); i++)
#define rreps(i, n) for (int i = int(n); i >= 1; i--)
#define repc(i, n) for (int i = 0; i <= int(n); i++)
#define rrepc(i, n) for (int i = int(n); i >= 0; i--)
#define repi(i, a, b) for (int i = int(a); i < int(b); i++)
#define repic(i, a, b) for (int i = int(a); i <= int(b); i++)
#define repp(i, n) rep(i, n)
#define reppp(i, n) repp(i, n)
#define rrepp(i, n) rrep(i, n)
#define repss(i, n) reps(i, n)
#define repcc(i, n) repc(i, n)
#define repii(i, a, b) repi(i, a, b)
#define each(x, y) for (auto &x : y)
#define all(a) (a).begin(), (a).end()
#define bit(b) (1ll << (b))

using namespace std;

using i32 = int;
using i64 = long long;
using u64 = unsigned long long;
using f80 = long double;
using vi32 = vector<i32>;
using vi64 = vector<i64>;
using vu64 = vector<u64>;
using vf80 = vector<f80>;
using vstr = vector<string>;

inline void yes() { cout << "Yes" << '\n'; exit(0); }
inline void no() { cout << "No" << '\n'; exit(0); }
inline i64 gcd(i64 a, i64 b) { if (min(a, b) == 0) return max(a, b); if (a % b == 0) return b; return gcd(b, a % b); }
inline i64 lcm(i64 a, i64 b) { return a / gcd(a, b) * b; }
inline u64 xorshift() { static u64 x = 88172645463325252ull; x = x ^ (x << 7); return x = x ^ (x >> 9); }
void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
template <typename T> class pqasc : public priority_queue<T, vector<T>, greater<T>> {};
template <typename T> class pqdesc : public priority_queue<T, vector<T>, less<T>> {};
template <typename T> inline void amax(T &x, T y) { if (x < y) x = y; }
template <typename T> inline void amin(T &x, T y) { if (x > y) x = y; }
template <typename T> inline T power(T x, i64 n, T e = 1) { T r = e; while (n > 0) { if (n & 1) r *= x; x *= x; n >>= 1; } return r; }
template <typename T> istream& operator>>(istream &is, vector<T> &v) { each(x, v) is >> x; return is; }
template <typename T> ostream& operator<<(ostream &os, vector<T> &v) { rep(i, v.size()) { if (i) os << ' '; os << v[i]; } return os; }
template <typename T, typename S> istream& operator>>(istream &is, pair<T, S> &p) { is >> p.first >> p.second; return is; }
template <typename T, typename S> ostream& operator<<(ostream &os, pair<T, S> &p) { os << p.first << ' ' << p.second; return os; }

void solve() {
  int n; cin >> n;
  vi32 a(n); cin >> a;
  map<int, int> se;
  rep(i, n) se[a[i]]++;
  if (se.size() == 1) {
    bool f = false;
    each(s, se) if (s.first == 0) f = true;
    if (f) yes(); no();
  }
  if (se.size() >= 4) no();
  if (se.size() == 3) {
    if (n % 3 != 0) no();
    each(s, se) {
      if (s.second != n / 3) no();
    }
    yes();
  }
  bool f = false;
  int x, c;
  each(s, se) if (s.first == 0) f = true; else x = s.first, c = s.second;
  if (!f) no();
  {
    vi32 ans(n);
    int cnt = 0;

    ans[0] = x, ans[1] = 0, cnt = 1;
    for (int i = 0; i + 3 <= n; i++) {
      ans[i + 2] = ans[i] ^ ans[i + 1];
      if (ans[i + 2] == x) cnt++;
    }
    if (ans[n - 1] == (ans[0] ^ ans[n - 2]) && ans[0] == (ans[n - 1] ^ ans[1]) && c == cnt) yes();

    ans[0] = x, ans[1] = x, cnt = 2;
    for (int i = 0; i + 3 <= n; i++) {
      ans[i + 2] = ans[i] ^ ans[i + 1];
      if (ans[i + 2] == x) cnt++;
    }
    if (ans[n - 1] == (ans[0] ^ ans[n - 2]) && ans[0] == (ans[n - 1] ^ ans[1]) && c == cnt) yes();

    ans[0] = 0, ans[1] = x, cnt = 1;
    for (int i = 0; i + 3 <= n; i++) {
      ans[i + 2] = ans[i] ^ ans[i + 1];
      if (ans[i + 2] == x) cnt++;
    }
    if (ans[n - 1] == (ans[0] ^ ans[n - 2]) && ans[0] == (ans[n - 1] ^ ans[1]) && c == cnt) yes();
  }
  no();
}


Compiler output:
a.cc:3:8: error: stray '#' in program
    3 | 1 2 4 8#include <bits/stdc++.h>
      |        ^
a.cc:1:1: error: expected unqualified-id before numeric constant
    1 | 4
      | ^
a.cc:29:14: error: 'vector' does not name a type
   29 | using vi32 = vector<i32>;
      |              ^~~~~~
a.cc:30:14: error: 'vector' does not name a type
   30 | using vi64 = vector<i64>;
      |              ^~~~~~
a.cc:31:14: error: 'vector' does not name a type
   31 | using vu64 = vector<u64>;
      |              ^~~~~~
a.cc:32:14: error: 'vector' does not name a type
   32 | using vf80 = vector<f80>;
      |              ^~~~~~
a.cc:33:14: error: 'vector' does not name a type
   33 | using vstr = vector<string>;
      |              ^~~~~~
a.cc: In function 'void yes()':
a.cc:35:21: error: 'cout' was not declared in this scope
   35 | inline void yes() { cout << "Yes" << '\n'; exit(0); }
      |                     ^~~~
a.cc:35:44: error: 'exit' was not declared in this scope
   35 | inline void yes() { cout << "Yes" << '\n'; exit(0); }
      |                                            ^~~~
a.cc:1:1: note: 'exit' is defined in header '<cstdlib>'; this is probably fixable by adding '#include <cstdlib>'
  +++ |+#include <cstdlib>
    1 | 4
a.cc: In function 'void no()':
a.cc:36:20: error: 'cout' was not declared in this scope
   36 | inline void no() { cout << "No" << '\n'; exit(0); }
      |                    ^~~~
a.cc:36:42: error: 'exit' was not declared in this scope
   36 | inline void no() { cout << "No" << '\n'; exit(0); }
      |                                          ^~~~
a.cc:36:42: note: 'exit' is defined in header '<cstdlib>'; this is probably fixable by adding '#include <cstdlib>'
a.cc: In function 'i64 gcd(i64, i64)':
a.cc:37:36: error: 'min' was not declared in this scope
   37 | inline i64 gcd(i64 a, i64 b) { if (min(a, b) == 0) return max(a, b); if (a % b == 0) return b; return gcd(b, a % b); }
      |                                    ^~~
a.cc:37:59: error: 'max' was not declared in this scope
   37 | inline i64 gcd(i64 a, i64 b) { if (min(a, b) == 0) return max(a, b); if (a % b == 0) return b; return gcd(b, a % b); }
      |                                                           ^~~
a.cc: In function 'int main()':
a.cc:40:28: error: 'ios' has not been declared
   40 | void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
      |                            ^~~
a.cc:40:53: error: 'cin' was not declared in this scope
   40 | void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
      |                                                     ^~~
a.cc:40:65: error: 'cout' was not declared in this scope
   40 | void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
      |                                                                 ^~~~
a.cc:40:73: error: 'fixed' was not declared in this scope
   40 | void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
      |                                                                         ^~~~~
a.cc:40:82: error: 'setprecision' was not declared in this scope
   40 | void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
      |                                                                                  ^~~~~~~~~~~~
a.cc: At global scope:
a.cc:41:58: error: expected template-name before '<' token
   41 | template <typename T> class pqasc : public priority_queue<T, vector<T>, greater<T>> {};
      |                                                          ^
a.cc:41:58: error: expected '{' before '<' token
a.cc:42:59: error: expected template-name before '<' token
   42 | template <typename T> class pqdesc : public priority_queue<T, vector<T>, less<T>> {};
      |                                                           ^
a.cc:42:59: error: expected '{' before '<' token
a.cc:46:23: error: 'istream' does not name a type
   46 | template <typename T> istream& operator>>(istream &is, vector<T> &v) { each(x, v) is >> x; return is; }
      |                       ^~~~~~~
a.cc:47:23: error: 'ostream' does not name a type
   47 | template <typename T> ostream& operator<<(ostream &os, vector<T> &v) { rep(i, v.size()) { if (i) os << ' '; os << v[i]; } return os; }
      |                       ^~~~~~~
a.cc:48:35: error: 'istream' does not name a type
   48 | template <typename T, typename S> istream& operator>>(istream &is, pair<T, S> &p) { is >> p.first >> p.second; return is; }
      |                                   ^~~~~~~
a.cc:49:35: error: 'ostream' does not name a type
   49 | template <typename T, typename S> ostream& operator<<(ostream &os, pair<T, S> &p) { os << p.first << ' ' << p.second; return os; }
      |                                   ^~~~~~~
a.cc: In function 'void solve()':
a.cc:52:10: error: 'cin' was not declared in this scope
   52 |   int n; cin >> n;
      |          ^~~
a.cc:53:3: error: 'vi32' was not declared in this scope; did you mean 'i32'?
   53 |   vi32 a(n); cin >> a;
      |   ^~~~
      |   i32
a.cc:53:21: error: 'a' was not declared in this scope
   53 |   vi32 a(n); cin >> a;
      |                     ^
a.cc:54:3: error: 'map' was not declared in this scope
   54 |   map<int, int> se;
      |   ^~~
a.cc:54:7: error: expected primary-expression before 'int'
   54 |   map<int, int> se;
      |       ^~~
a.cc:55:13: error: 'se' was not declared in this scope
   55 |   rep(i, n) se[a[i]]++;
      |             ^~
a.cc:56:7: error: 'se' was not declared in this scope
   56 |   if (se.size() == 1) {
      |       ^~
a.cc:61:7: error: 'se' was not declared in this scope
   61 |   if (se.size() >= 4) no();
      |       ^~
a.cc:62:7: error: 'se' was not declared in this scope
   62 |   if (se.size() == 3) {
      |       ^~
a.cc:71:11: error: 'se' was not declared in this scope; did you mean 's'?
   71 |   each(s, se) if (s.first == 0) f = true; else x = s.first, c = s.second;
      |           ^~
a.cc:19:35: note: in definition of macro 'each'
   19 | #define each(x, y) for (auto &x : y)
      |                                   ^
a.cc:74:9: error: expected ';' before 'ans'
   74 |     vi32 ans(n);
      |         ^~~~
      |         ;
a.cc:77:5: error: 'ans' was not declared in this scope
   77 |     ans[0] = x, ans[1] = 0, cnt = 1;
      |     ^~~