Problem p02680 (C++) — buggy submission, verdict: Runtime Error

#include <bits/stdc++.h>
using namespace std;

// Define
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template <class T> using pvector = vector<pair<T, T>>;
template <class T>
using rpriority_queue = priority_queue<T, vector<T>, greater<T>>;
constexpr const ll dx[4] = {1, 0, -1, 0};
constexpr const ll dy[4] = {0, 1, 0, -1};
constexpr const ll MOD = 1e9 + 7;
constexpr const ll mod = 998244353;
constexpr const ll INF = 1LL << 60;
constexpr const ll inf = 1 << 30;
constexpr const char rt = '\\n';
constexpr const char sp = ' ';
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define elif else if
#define all(a, v, ...)                                                         \\
  ([&](decltype((v)) w) { return (a)(begin(w), end(w), ##__VA_ARGS__); })(v)
#define rall(a, v, ...)                                                        \\
  ([&](decltype((v)) w) { return (a)(rbegin(w), rend(w), ##__VA_ARGS__); })(v)
#define fi first
#define se second

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 (a > b) {
    a = b;
    return 1;
  }
  return 0;
}

// Debug
#define debug(...)                                                             \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #__VA_ARGS__ << " = ";                         \\
    for (auto &&X : {__VA_ARGS__})                                             \\
      cerr << "[" << X << "] ";                                                \\
    cerr << rt;                                                                \\
  }

#define dump(a, h, w)                                                          \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #a << " = [" << rt;                            \\
    rep(_i, h) {                                                               \\
      rep(_j, w) cerr << a[_i][_j] << sp;                                      \\
      cerr << rt;                                                              \\
    }                                                                          \\
    cerr << "]" << rt;                                                         \\
  }

#define vdump(a, n)                                                            \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #a << " = [";                                  \\
    rep(_i, n) if (_i) cerr << sp << a[_i];                                    \\
    else cerr << a[_i];                                                        \\
    cerr << "]" << rt;                                                         \\
  }

// Loop
#define inc(i, a, n) for (ll i = (a), _##i = (n); i <= _##i; ++i)
#define dec(i, a, n) for (ll i = (a), _##i = (n); i >= _##i; --i)
#define rep(i, n) for (ll i = 0, _##i = (n); i < _##i; ++i)
#define each(i, a) for (auto &&i : a)

// Stream
#define fout(n) cout << fixed << setprecision(n)
struct io {
  io() { cin.tie(nullptr), ios::sync_with_stdio(false); }
} io;

// Speed
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

// Math
inline constexpr ll gcd(const ll a, const ll b) {
  return b ? gcd(b, a % b) : a;
}
inline constexpr ll lcm(const ll a, const ll b) { return a / gcd(a, b) * b; }

inline constexpr ll modulo(const ll n, const ll m = MOD) {
  ll k = n % m;
  return k + m * (k < 0);
}
inline constexpr ll chmod(ll &n, const ll m = MOD) {
  n %= m;
  return n += m * (n < 0);
}
inline constexpr ll mpow(ll a, ll n, const ll m = MOD) {
  ll r = 1;
  rep(i, 64) {
    if (n & (1LL << i))
      r *= a;
    chmod(r, m);
    a *= a;
    chmod(a, m);
  }
  return r;
}
inline ll inv(const ll n, const ll m = MOD) {
  ll a = n, b = m, x = 1, y = 0;
  while (b) {
    ll t = a / b;
    a -= t * b;
    swap(a, b);
    x -= t * y;
    swap(x, y);
  }
  return modulo(x, m);
}

queue<pair<ll, ll>> Q;
ll S[6010][6010];
signed main() {
  ll N, M;
  cin >> N >> M;
  ll A[N], B[N], C[N], D[M], E[M], F[M];
  vector<ll> X, Y;
  inc(i, -1, 0) X.pb(i), Y.pb(i);
  X.push_back(-INF), X.push_back(INF - 1), X.push_back(INF);
  Y.push_back(-INF), Y.push_back(INF - 1), Y.push_back(INF);
  rep(i, N) {
    cin >> A[i] >> B[i] >> C[i];
    X.push_back(2 * A[i]), X.push_back(2 * B[i]);
    X.push_back(2 * A[i] - 1), X.push_back(2 * B[i] - 1);
    Y.push_back(2 * C[i]);
    Y.push_back(2 * C[i] - 1);
  }
  rep(i, M) {
    cin >> D[i] >> E[i] >> F[i];
    X.push_back(2 * D[i]);
    X.push_back(2 * D[i] - 1);
    Y.push_back(2 * E[i]);
    Y.push_back(2 * E[i] - 1);
    Y.push_back(2 * F[i]);
    Y.push_back(2 * F[i] - 1);
  }
  all(sort, X), all(sort, Y);
  X.erase(all(unique, X), X.end());
  Y.erase(all(unique, Y), Y.end());
  // vdump(X, X.size());
  // vdump(Y, Y.size());
  ll H = X.size(), W = Y.size();
  map<ll, ll> x, y;
  rep(i, H) x[X[i]] = i;
  rep(i, W) y[Y[i]] = i;
  rep(i, H) rep(j, W) S[i][j] = 0;
  rep(i, N) {
    S[x[2 * A[i]]][y[2 * C[i]]]++;
    S[x[2 * A[i]]][y[2 * C[i]] + 1]--;
    S[x[2 * B[i]] + 1][y[2 * C[i]]]--;
    S[x[2 * B[i]] + 1][y[2 * C[i]] + 1]++;
  }
  rep(i, M) {
    S[x[2 * D[i]]][y[2 * E[i]]]++;
    S[x[2 * D[i]] + 1][y[2 * E[i]]]--;
    S[x[2 * D[i]]][y[2 * F[i]] + 1]--;
    S[x[2 * D[i]] + 1][y[2 * F[i]] + 1]++;
  }
  rep(i, H - 1) rep(j, W) S[i + 1][j] += S[i][j];
  rep(i, H) rep(j, W - 1) S[i][j + 1] += S[i][j];
  Q.push({x[0], y[0]});
  S[x[0]][y[0]] = -1;
  while (!Q.empty()) {
    pair<ll, ll> now = Q.front();
    Q.pop();
    rep(i, 4) {
      pair<ll, ll> next = make_pair(now.fi + dx[i], now.se + dy[i]);
      if (0 <= next.fi && next.fi < H && 0 <= next.se && next.se < W)
        if (S[next.fi][next.se] == 0) {
          Q.push(next);
          S[next.fi][next.se] = -1;
        }
    }
  }
  if (S[H - 1][W - 1] == -1) {
    cout << "INF" << rt;
    return 0;
  }
  // debug(x[0], y[0]);
  ll res = 0;
  rep(i, H) rep(j, W) {
    if (S[i][j] == -1) {
      S[i][j] = 8;
      if (X[i] & 1 and Y[j] & 1) {
        S[i][j] = 4;
        res += (X[i + 1] - X[i - 1]) * (Y[j + 1] - Y[j - 1]) / 4;
      }
    }
  }
  // dump(S, H, W);
  cout << res << rt;
}

// -g -D_GLIBCXX_DEBUG -fsanitize=undefined


Error: 0

Fixed submission:

#include <bits/stdc++.h>
using namespace std;

// Define
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template <class T> using pvector = vector<pair<T, T>>;
template <class T>
using rpriority_queue = priority_queue<T, vector<T>, greater<T>>;
constexpr const ll dx[4] = {1, 0, -1, 0};
constexpr const ll dy[4] = {0, 1, 0, -1};
constexpr const ll MOD = 1e9 + 7;
constexpr const ll mod = 998244353;
constexpr const ll INF = 1LL << 60;
constexpr const ll inf = 1 << 30;
constexpr const char rt = '\\n';
constexpr const char sp = ' ';
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define elif else if
#define all(a, v, ...)                                                         \\
  ([&](decltype((v)) w) { return (a)(begin(w), end(w), ##__VA_ARGS__); })(v)
#define rall(a, v, ...)                                                        \\
  ([&](decltype((v)) w) { return (a)(rbegin(w), rend(w), ##__VA_ARGS__); })(v)
#define fi first
#define se second

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 (a > b) {
    a = b;
    return 1;
  }
  return 0;
}

// Debug
#define debug(...)                                                             \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #__VA_ARGS__ << " = ";                         \\
    for (auto &&X : {__VA_ARGS__})                                             \\
      cerr << "[" << X << "] ";                                                \\
    cerr << rt;                                                                \\
  }

#define dump(a, h, w)                                                          \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #a << " = [" << rt;                            \\
    rep(_i, h) {                                                               \\
      rep(_j, w) cerr << a[_i][_j] << sp;                                      \\
      cerr << rt;                                                              \\
    }                                                                          \\
    cerr << "]" << rt;                                                         \\
  }

#define vdump(a, n)                                                            \\
  {                                                                            \\
    cerr << __LINE__ << ": " << #a << " = [";                                  \\
    rep(_i, n) if (_i) cerr << sp << a[_i];                                    \\
    else cerr << a[_i];                                                        \\
    cerr << "]" << rt;                                                         \\
  }

// Loop
#define inc(i, a, n) for (ll i = (a), _##i = (n); i <= _##i; ++i)
#define dec(i, a, n) for (ll i = (a), _##i = (n); i >= _##i; --i)
#define rep(i, n) for (ll i = 0, _##i = (n); i < _##i; ++i)
#define each(i, a) for (auto &&i : a)

// Stream
#define fout(n) cout << fixed << setprecision(n)
struct io {
  io() { cin.tie(nullptr), ios::sync_with_stdio(false); }
} io;

// Speed
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

// Math
inline constexpr ll gcd(const ll a, const ll b) {
  return b ? gcd(b, a % b) : a;
}
inline constexpr ll lcm(const ll a, const ll b) { return a / gcd(a, b) * b; }

inline constexpr ll modulo(const ll n, const ll m = MOD) {
  ll k = n % m;
  return k + m * (k < 0);
}
inline constexpr ll chmod(ll &n, const ll m = MOD) {
  n %= m;
  return n += m * (n < 0);
}
inline constexpr ll mpow(ll a, ll n, const ll m = MOD) {
  ll r = 1;
  rep(i, 64) {
    if (n & (1LL << i))
      r *= a;
    chmod(r, m);
    a *= a;
    chmod(a, m);
  }
  return r;
}
inline ll inv(const ll n, const ll m = MOD) {
  ll a = n, b = m, x = 1, y = 0;
  while (b) {
    ll t = a / b;
    a -= t * b;
    swap(a, b);
    x -= t * y;
    swap(x, y);
  }
  return modulo(x, m);
}

queue<pair<ll, ll>> Q;
signed main() {
  ll N, M;
  cin >> N >> M;
  ll A[N], B[N], C[N], D[M], E[M], F[M];
  vector<ll> X, Y;
  inc(i, -1, 0) X.pb(i), Y.pb(i);
  X.push_back(-INF), X.push_back(INF - 1), X.push_back(INF);
  Y.push_back(-INF), Y.push_back(INF - 1), Y.push_back(INF);
  rep(i, N) {
    cin >> A[i] >> B[i] >> C[i];
    X.push_back(2 * A[i]), X.push_back(2 * B[i]);
    X.push_back(2 * A[i] - 1), X.push_back(2 * B[i] - 1);
    Y.push_back(2 * C[i]);
    Y.push_back(2 * C[i] - 1);
  }
  rep(i, M) {
    cin >> D[i] >> E[i] >> F[i];
    X.push_back(2 * D[i]);
    X.push_back(2 * D[i] - 1);
    Y.push_back(2 * E[i]);
    Y.push_back(2 * E[i] - 1);
    Y.push_back(2 * F[i]);
    Y.push_back(2 * F[i] - 1);
  }
  all(sort, X), all(sort, Y);
  X.erase(all(unique, X), X.end());
  Y.erase(all(unique, Y), Y.end());
  // vdump(X, X.size());
  // vdump(Y, Y.size());
  ll H = X.size(), W = Y.size();
  map<ll, ll> x, y;
  rep(i, H) x[X[i]] = i;
  rep(i, W) y[Y[i]] = i;
  ll S[H][W];
  rep(i, H) rep(j, W) S[i][j] = 0;
  rep(i, N) {
    S[x[2 * A[i]]][y[2 * C[i]]]++;
    S[x[2 * A[i]]][y[2 * C[i]] + 1]--;
    S[x[2 * B[i]] + 1][y[2 * C[i]]]--;
    S[x[2 * B[i]] + 1][y[2 * C[i]] + 1]++;
  }
  rep(i, M) {
    S[x[2 * D[i]]][y[2 * E[i]]]++;
    S[x[2 * D[i]] + 1][y[2 * E[i]]]--;
    S[x[2 * D[i]]][y[2 * F[i]] + 1]--;
    S[x[2 * D[i]] + 1][y[2 * F[i]] + 1]++;
  }
  rep(i, H - 1) rep(j, W) S[i + 1][j] += S[i][j];
  rep(i, H) rep(j, W - 1) S[i][j + 1] += S[i][j];
  Q.push({x[0], y[0]});
  S[x[0]][y[0]] = -1;
  while (!Q.empty()) {
    pair<ll, ll> now = Q.front();
    Q.pop();
    rep(i, 4) {
      pair<ll, ll> next = make_pair(now.fi + dx[i], now.se + dy[i]);
      if (0 <= next.fi && next.fi < H && 0 <= next.se && next.se < W)
        if (S[next.fi][next.se] == 0) {
          Q.push(next);
          S[next.fi][next.se] = -1;
        }
    }
  }
  if (S[H - 1][W - 1] == -1) {
    cout << "INF" << rt;
    return 0;
  }
  // debug(x[0], y[0]);
  ll res = 0;
  rep(i, H) rep(j, W) {
    if (S[i][j] == -1) {
      S[i][j] = 8;
      if (X[i] & 1 and Y[j] & 1) {
        S[i][j] = 4;
        res += (X[i + 1] - X[i - 1]) * (Y[j + 1] - Y[j - 1]) / 4;
      }
    }
  }
  // dump(S, H, W);
  cout << res << rt;
}

// -g -D_GLIBCXX_DEBUG -fsanitize=undefined