Problem p02557 (C++) — buggy submission, verdict: Runtime Error

/* #region header */
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "cxx-prettyprint-master/prettyprint.hpp"
void debug() { cout << endl; }
template <typename Head, typename... Tail> void debug(Head H, Tail... T) {
  cout << " " << H;
  debug(T...);
}
#else
#define debug(...) 42
#endif
// types
using ll = long long;
using ull = unsigned long long;
using ld = long double;
typedef pair<ll, ll> Pl;
typedef pair<int, int> Pi;
typedef vector<ll> vl;
typedef vector<int> vi;
typedef vector<char> vc;
template <typename T> using mat = vector<vector<T>>;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef vector<vector<char>> vvc;

// abreviations
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define rep_(i, a_, b_, a, b, ...) for (ll i = (a), max_i = (b); i < max_i; i++)
#define rep(i, ...) rep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define rrep_(i, a_, b_, a, b, ...)                                            \\
  for (ll i = (b - 1), min_i = (a); i >= min_i; i--)
#define rrep(i, ...) rrep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define SZ(x) ((ll)(x).size())
#define pb(x) push_back(x)
#define eb(x) emplace_back(x)
#define mp make_pair
#define print(x) cout << x << endl
#define vprint(x)                                                              \\
  rep(i, x.size()) cout << x[i] << ' ';                                        \\
  cout << endl
#define vsum(x) accumulate(all(x), 0LL)
#define vmax(a) *max_element(all(a))
#define vmin(a) *min_element(all(a))
#define lb(c, x) distance((c).begin(), lower_bound(all(c), (x)))
#define ub(c, x) distance((c).begin(), upper_bound(all(c), (x)))
// functions
// gcd(0, x) fails.
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
template <typename T> T mypow(T x, ll n) {
  T ret = 1;
  while (n > 0) {
    if (n & 1)
      (ret *= x);
    (x *= x);
    n >>= 1;
  }
  return ret;
}
ll modpow(ll x, ll n, const ll mod) {
  ll ret = 1;
  while (n > 0) {
    if (n & 1)
      (ret *= x);
    (x *= x);
    n >>= 1;
    x %= mod;
    ret %= mod;
  }
  return ret;
}
uint64_t my_rand(void) {
  static uint64_t x = 88172645463325252ULL;
  x = x ^ (x << 13);
  x = x ^ (x >> 7);
  return x = x ^ (x << 17);
}
ll popcnt(ull x) { return __builtin_popcountll(x); }
// graph template
template <typename T> struct edge {
  int src, to;
  T cost;

  edge(int to, T cost) : src(-1), to(to), cost(cost) {}

  edge(int src, int to, T cost) : src(src), to(to), cost(cost) {}

  edge &operator=(const int &x) {
    to = x;
    return *this;
  }

  bool operator<(const edge<T> &r) const { return cost < r.cost; }

  operator int() const { return to; }
};
template <typename T> using Edges = vector<edge<T>>;
template <typename T> using WeightedGraph = vector<Edges<T>>;
using UnWeightedGraph = vector<vector<int>>;
struct Timer {
  clock_t start_time;
  void start() { start_time = clock(); }
  int lap() {
    // return x ms.
    return (clock() - start_time) * 1000 / CLOCKS_PER_SEC;
  }
};
/* #endregion*/
// constant
#define inf 1000000005
#define INF 4000000004000000000LL
#define mod 1000000007LL
#define endl '\\n'
const long double eps = 0.000001;
const long double PI = 3.141592653589793;
// library
random_device seed_gen;
mt19937 engine(seed_gen());
int main() {
  cin.tie(0);
  ios::sync_with_stdio(0);
  cout << setprecision(20);
  Timer timer;
  timer.start();
  int n;
  cin >> n;
  vl a(n), b(n);
  rep(i, n) { cin >> a[i]; }
  rep(i, n) { cin >> b[i]; }
  vl cnta(n + 1), cntb(n + 1);
  rep(i, n) {
    cnta[a[i]]++;
    cntb[b[i]]++;
  }
  vi id(n + 1);
  iota(all(id), 0);
  while (timer.lap() < 1800) {
    shuffle(all(id), engine);
    deque<ll> que;
    rep(i, n + 1) que.pb(id[i]);
    mat<ll> res(n + 1);
    vl cnta2 = cnta;
    vl cntb2 = cntb;
    for (int i : id) {
      if (*que.begin() == i) {
        que.pop_front();
        que.push_back(i);
      }

      while (cntb2[i] > 0) {
        int j = *que.begin();
        if (j == i) {
          if (que.size() == 1) {
            goto repeat;
          } else {
            que.pop_front();
            que.push_back(j);
          }
        }
        if (cntb2[i] < cnta2[j]) {
          rep(k, cntb2[i]) res[j].pb(i);
          cnta2[j] -= cntb2[i];
          cntb2[i] = 0;
        } else {
          rep(k, cnta2[j]) res[j].pb(i);
          cntb2[i] -= cnta2[j];
          cnta2[j] = 0;
          que.pop_front();
        }
        if (timer.lap() > 1900) {
          goto repeat;
        }
      }
    }
    print("Yes");
    rep(i, n) {
      cout << res[a[i]].back() << ' ';
      res[a[i]].pop_back();
    }
    return 0;
  repeat:
    continue;
  }
  print("No");
}


Error: WA

Fixed submission:

/* #region header */
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "cxx-prettyprint-master/prettyprint.hpp"
void debug() { cout << endl; }
template <typename Head, typename... Tail> void debug(Head H, Tail... T) {
  cout << " " << H;
  debug(T...);
}
#else
#define debug(...) 42
#endif
// types
using ll = long long;
using ull = unsigned long long;
using ld = long double;
typedef pair<ll, ll> Pl;
typedef pair<int, int> Pi;
typedef vector<ll> vl;
typedef vector<int> vi;
typedef vector<char> vc;
template <typename T> using mat = vector<vector<T>>;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef vector<vector<char>> vvc;

// abreviations
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define rep_(i, a_, b_, a, b, ...) for (ll i = (a), max_i = (b); i < max_i; i++)
#define rep(i, ...) rep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define rrep_(i, a_, b_, a, b, ...)                                            \\
  for (ll i = (b - 1), min_i = (a); i >= min_i; i--)
#define rrep(i, ...) rrep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define SZ(x) ((ll)(x).size())
#define pb(x) push_back(x)
#define eb(x) emplace_back(x)
#define mp make_pair
#define print(x) cout << x << endl
#define vprint(x)                                                              \\
  rep(i, x.size()) cout << x[i] << ' ';                                        \\
  cout << endl
#define vsum(x) accumulate(all(x), 0LL)
#define vmax(a) *max_element(all(a))
#define vmin(a) *min_element(all(a))
#define lb(c, x) distance((c).begin(), lower_bound(all(c), (x)))
#define ub(c, x) distance((c).begin(), upper_bound(all(c), (x)))
// functions
// gcd(0, x) fails.
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
template <typename T> T mypow(T x, ll n) {
  T ret = 1;
  while (n > 0) {
    if (n & 1)
      (ret *= x);
    (x *= x);
    n >>= 1;
  }
  return ret;
}
ll modpow(ll x, ll n, const ll mod) {
  ll ret = 1;
  while (n > 0) {
    if (n & 1)
      (ret *= x);
    (x *= x);
    n >>= 1;
    x %= mod;
    ret %= mod;
  }
  return ret;
}
uint64_t my_rand(void) {
  static uint64_t x = 88172645463325252ULL;
  x = x ^ (x << 13);
  x = x ^ (x >> 7);
  return x = x ^ (x << 17);
}
ll popcnt(ull x) { return __builtin_popcountll(x); }
// graph template
template <typename T> struct edge {
  int src, to;
  T cost;

  edge(int to, T cost) : src(-1), to(to), cost(cost) {}

  edge(int src, int to, T cost) : src(src), to(to), cost(cost) {}

  edge &operator=(const int &x) {
    to = x;
    return *this;
  }

  bool operator<(const edge<T> &r) const { return cost < r.cost; }

  operator int() const { return to; }
};
template <typename T> using Edges = vector<edge<T>>;
template <typename T> using WeightedGraph = vector<Edges<T>>;
using UnWeightedGraph = vector<vector<int>>;
struct Timer {
  clock_t start_time;
  void start() { start_time = clock(); }
  int lap() {
    // return x ms.
    return (clock() - start_time) * 1000 / CLOCKS_PER_SEC;
  }
};
/* #endregion*/
// constant
#define inf 1000000005
#define INF 4000000004000000000LL
#define mod 1000000007LL
#define endl '\\n'
const long double eps = 0.000001;
const long double PI = 3.141592653589793;
// library
random_device seed_gen;
mt19937 engine(seed_gen());
int main() {
  cin.tie(0);
  ios::sync_with_stdio(0);
  cout << setprecision(20);
  Timer timer;
  timer.start();
  int n;
  cin >> n;
  vl a(n), b(n);
  rep(i, n) { cin >> a[i]; }
  rep(i, n) { cin >> b[i]; }
  vl cnta(n + 1), cntb(n + 1);
  rep(i, n) {
    cnta[a[i]]++;
    cntb[b[i]]++;
  }
  vi id(n + 1);
  iota(all(id), 0);
  while (timer.lap() < 1800) {
    shuffle(all(id), engine);
    deque<ll> que;
    rep(i, n + 1) que.pb(id[i]);
    mat<ll> res(n + 1);
    for (int i : id) {
      if (*que.begin() == i) {
        que.pop_front();
        que.push_back(i);
      }
      vl cnta2 = cnta;
      vl cntb2 = cntb;

      while (cntb2[i] > 0) {
        int j = *que.begin();
        if (j == i) {
          if (que.size() == 1) {
            goto repeat;
          } else {
            que.pop_front();
            que.push_back(j);
          }
        }
        if (cntb2[i] < cnta2[j]) {
          rep(k, cntb2[i]) res[j].pb(i);
          cnta2[j] -= cntb2[i];
          cntb2[i] = 0;
        } else {
          rep(k, cnta2[j]) res[j].pb(i);
          cntb2[i] -= cnta2[j];
          cnta2[j] = 0;
          que.pop_front();
        }
        if (timer.lap() > 1900) {
          goto repeat;
        }
      }
    }
    print("Yes");
    rep(i, n) {
      cout << res[a[i]].back() << ' ';
      res[a[i]].pop_back();
    }
    return 0;
  repeat:
    continue;
  }
  print("No");
}