Language: C++

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define ALL(obj) (obj).begin(),(obj).end()
template<class T> using priority_queue_reverse = priority_queue<T,vector<T>,greater<T>>;

constexpr long long MOD = 1'000'000'000LL + 7; //'
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e11;
constexpr long double PI = 3.1415926535897932384626433L;

template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
vector<string> split(const string &str, const char delemiter) {vector<string> res;stringstream ss(str);string buffer; while( getline(ss, buffer, delemiter) ) res.push_back(buffer); return res;}
int msb(int x) {return x?31-__builtin_clz(x):-1;}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}

//Seat Pressure O(NlogN)
template<class T> class Zarts{
public:
    vector<int> compress;
    vector<T> val;
    map<T, int> idx;
    int M;
    Zarts(const vector<T> & ar) : M(0) {
        for (auto &e : ar) idx[e] = 0;
        for (auto &e : idx) e.second = M++;
        val.resize(M);
        for (auto &e : idx) val[e.second]=e.first;
        for (auto &e : ar) compress.push_back(idx[e]);
    }
};

int main() {
    cin.tie(0);ios::sync_with_stdio(false);
    int N,M; cin >> N >> M;
    vector<ll> X,Y;
    for(int i = 0; i < N; ++i) {
        int A,B,C;
        cin >> A >> B >> C;
        Y.push_back(A);
        Y.push_back(B);
        X.push_back(C);
    }
    for(int i = 0; i < M; ++i) {
        int D,E,F;
        cin >> D >> E >> F;
        Y.push_back(D);
        X.push_back(E);
        X.push_back(F);
    }
    Y.push_back(0);
    X.push_back(0);
    Y.push_back(-LOWINF);
    Y.push_back(LOWINF);
    X.push_back(-LOWINF);
    X.push_back(LOWINF);
    Zarts<ll> ZY(Y),ZX(X);
    int H = ZY.M,W = ZX.M;

    //y1,y2,x;
    vector<set<pair<int,int>>> stx(W); 
    for(int i=0; i<N; ++i) {
        ll y1 = Y[2*i],y2 = Y[2*i+1],x = X[i];
        int zy1 = ZY.idx[y1],zy2 = ZY.idx[y2], zx = ZX.idx[x];
        for(int j = zy1; j+1<=zy2; ++j) {
            stx[zx].insert({j,j+1});
        }
    }
    //y,x1,x2;
    vector<set<pair<int,int>>> sty(H); 
    for(int i=0; i<M; ++i) {
        ll y = Y[2*N+i],x1 = X[N+2*i],x2 = X[N+2*i+1];
        int zy = ZY.idx[y],zx1 = ZX.idx[x1], zx2 = ZX.idx[x2];
        for(int j = zx1; j+1<=zx2; ++j) {
            sty[zy].insert({j,j+1});
        }
    }
    vector<ll> grid(H*W,0);
    vector<vector<int>> edge(H*W);
    for(int i = 0; i+1 < H; ++i) {
        for(int j = 0; j+1 < W; ++j) {
            ll dy = ZY.val[i+1]-ZY.val[i];
            ll dx = ZX.val[j+1]-ZX.val[j];
            ll s = -1;
            if(dy < 1e10 && dx < 1e10) s = dy*dx;
            grid[i*W+j] = s;
            if(!stx[j+1].count({i,i+1})) {
                int from = i*W+j,to = i*W+j+1;
                edge[from].push_back(to);
                edge[to].push_back(from);
            }
            if(!sty[i+1].count({j,j+1})) {
                int from = i*W+j,to = (i+1)*W+j;
                edge[from].push_back(to);
                edge[to].push_back(from);
            }
        }
    }
    int sy = ZY.idx[0],sx = ZX.idx[0];
    queue<int> q;
    q.push(sy*W+sx);
    ll sum = 0;
    sum += grid[sy*W+sx];
    grid[sy*W+sx] = 0;
    while(q.size()) {
        int from = q.front(); q.pop();
        for(int to:edge[from]) {
            int ny = to/W, nx = to%W;
            if(grid[ny*W+nx]==0) continue;
            corner(grid[ny*W+nx]==-1,"INF");
            sum += grid[ny*W+nx];
            grid[ny*W+nx] = 0;
            q.push(to);
        }
    }
    cout << sum << endl;
    return 0;
}
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define ALL(obj) (obj).begin(),(obj).end()
template<class T> using priority_queue_reverse = priority_queue<T,vector<T>,greater<T>>;

constexpr long long MOD = 1'000'000'000LL + 7; //'
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e11;
constexpr long double PI = 3.1415926535897932384626433L;

template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
vector<string> split(const string &str, const char delemiter) {vector<string> res;stringstream ss(str);string buffer; while( getline(ss, buffer, delemiter) ) res.push_back(buffer); return res;}
int msb(int x) {return x?31-__builtin_clz(x):-1;}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}

//Seat Pressure O(NlogN)
template<class T> class Zarts{
public:
    vector<int> compress;
    vector<T> val;
    map<T, int> idx;
    int M;
    Zarts(const vector<T> & ar) : M(0) {
        for (auto &e : ar) idx[e] = 0;
        for (auto &e : idx) e.second = M++;
        val.resize(M);
        for (auto &e : idx) val[e.second]=e.first;
        for (auto &e : ar) compress.push_back(idx[e]);
    }
};

int main() {
    cin.tie(0);ios::sync_with_stdio(false);
    int N,M; cin >> N >> M;
    vector<ll> X,Y;
    for(int i = 0; i < N; ++i) {
        int A,B,C;
        cin >> A >> B >> C;
        Y.push_back(A);
        Y.push_back(B);
        X.push_back(C);
    }
    for(int i = 0; i < M; ++i) {
        int D,E,F;
        cin >> D >> E >> F;
        Y.push_back(D);
        X.push_back(E);
        X.push_back(F);
    }
    Y.push_back(0);
    X.push_back(0);
    Y.push_back(-LOWINF);
    Y.push_back(LOWINF);
    X.push_back(-LOWINF);
    X.push_back(LOWINF);
    Zarts<ll> ZY(Y),ZX(X);
    int H = ZY.M,W = ZX.M;

    //y1,y2,x;
    vector<set<pair<int,int>>> stx(W); 
    for(int i=0; i<N; ++i) {
        ll y1 = Y[2*i],y2 = Y[2*i+1],x = X[i];
        int zy1 = ZY.idx[y1],zy2 = ZY.idx[y2], zx = ZX.idx[x];
        for(int j = zy1; j+1<=zy2; ++j) {
            stx[zx].insert({j,j+1});
        }
    }
    //y,x1,x2;
    vector<set<pair<int,int>>> sty(H); 
    for(int i=0; i<M; ++i) {
        ll y = Y[2*N+i],x1 = X[N+2*i],x2 = X[N+2*i+1];
        int zy = ZY.idx[y],zx1 = ZX.idx[x1], zx2 = ZX.idx[x2];
        for(int j = zx1; j+1<=zx2; ++j) {
            sty[zy].insert({j,j+1});
        }
    }
    vector<ll> grid(H*W,0);
    vector<vector<int>> edge(H*W);
    for(int i = 0; i+1 < H; ++i) {
        for(int j = 0; j+1 < W; ++j) {
            ll dy = ZY.val[i+1]-ZY.val[i];
            ll dx = ZX.val[j+1]-ZX.val[j];
            ll s = -1;
            if(dy < 1e10 && dx < 1e10) s = dy*dx;
            grid[i*W+j] = s;
            if(!stx[j+1].count({i,i+1})) {
                int from = i*W+j,to = i*W+j+1;
                edge[from].push_back(to);
                edge[to].push_back(from);
            }
            if(!sty[i+1].count({j,j+1})) {
                int from = i*W+j,to = (i+1)*W+j;
                edge[from].push_back(to);
                edge[to].push_back(from);
            }
        }
    }
    int sy = ZY.idx[0],sx = ZX.idx[0];
    queue<int> q;
    q.push(sy*W+sx);
    ll sum = 0;
    sum += grid[sy*W+sx];
    grid[sy*W+sx] = 0;
    while(q.size()) {
        int from = q.front(); q.pop();
        for(int to:edge[from]) {
            int ny = to/W, nx = to%W;
            if(grid[ny*W+nx]==0) continue;
            corner(grid[ny*W+nx]==-1,"INF");
            sum += grid[ny*W+nx];
            grid[ny*W+nx] = 0;
            q.push(to);
        }
    }
    cout << sum << endl;
    return 0;
}


Compiler output:
a.cc:148:21: error: redefinition of 'constexpr const long long int MOD'
  148 | constexpr long long MOD = 1'000'000'000LL + 7; //'
      |                     ^~~
a.cc:11:21: note: 'constexpr const long long int MOD' previously defined here
   11 | constexpr long long MOD = 1'000'000'000LL + 7; //'
      |                     ^~~
a.cc:149:21: error: redefinition of 'constexpr const long long int MOD2'
  149 | constexpr long long MOD2 = 998244353;
      |                     ^~~~
a.cc:12:21: note: 'constexpr const long long int MOD2' previously defined here
   12 | constexpr long long MOD2 = 998244353;
      |                     ^~~~
a.cc:150:21: error: redefinition of 'constexpr const long long int HIGHINF'
  150 | constexpr long long HIGHINF = (long long)1e18;
      |                     ^~~~~~~
a.cc:13:21: note: 'constexpr const long long int HIGHINF' previously defined here
   13 | constexpr long long HIGHINF = (long long)1e18;
      |                     ^~~~~~~
a.cc:151:21: error: redefinition of 'constexpr const long long int LOWINF'
  151 | constexpr long long LOWINF = (long long)1e11;
      |                     ^~~~~~
a.cc:14:21: note: 'constexpr const long long int LOWINF' previously defined here
   14 | constexpr long long LOWINF = (long long)1e11;
      |                     ^~~~~~
a.cc:152:23: error: redefinition of 'constexpr const long double PI'
  152 | constexpr long double PI = 3.1415926535897932384626433L;
      |                       ^~
a.cc:15:23: note: 'constexpr const long double PI' previously defined here
   15 | constexpr long double PI = 3.1415926535897932384626433L;
      |                       ^~
a.cc:154:30: error: ambiguating new declaration 'template<class T> std::vector<_Tp> multivector(size_t, T)'
  154 | template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
      |                              ^~~~~~~~~~~
a.cc:17:30: note: old declaration 'template<class T> std::vector<_Tp> multivector(size_t, T)'
   17 | template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
      |                              ^~~~~~~~~~~
a.cc:155:28: error: ambiguating new declaration 'template<class ... T> auto multivector(size_t, T ...)'
  155 | template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
      |                            ^~~~~~~~~~~
a.cc:18:28: note: old declaration 'template<class ... T> auto multivector(size_t, T ...)'
   18 | template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
      |                            ^~~~~~~~~~~
a.cc:156:25: error: ambiguating new declaration 'template<class T> void corner(bool, T)'
  156 | template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
      |                         ^~~~~~
a.cc:19:25: note: old declaration 'template<class T> void corner(bool, T)'
   19 | template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
      |                         ^~~~~~
a.cc:157:37: error: ambiguating new declaration 'template<class T, class U> std::ostream& operator<<(std::ostream&, const std::map<T, U>&)'
  157 | template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
      |                                     ^~~~~~~~
a.cc:20:37: note: old declaration 'template<class T, class U> std::ostream& operator<<(std::ostream&, const std::map<T, U>&)'
   20 | template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
      |                                     ^~~~~~~~
a.cc:158:28: error: ambiguating new declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::set<T>&)'
  158 | template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:21:28: note: old declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::set<T>&)'
   21 | template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:159:28: error: ambiguating new declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::multiset<T>&)'
  159 | template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:22:28: note: old declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::multiset<T>&)'
   22 | template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:160:28: error: ambiguating new declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::vector<_Tp>&)'
  160 | template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:23:28: note: old declaration 'template<class T> std::ostream& operator<<(std::ostream&, const std::vector<_Tp>&)'
   23 | template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
      |                            ^~~~~~~~
a.cc:161:37: error: ambiguating new declaration 'template<class T, class U> std::ostream& operator<<(std::ostream&, const std::pair<_T1, _T2>&)'
  161 | template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
      |                                     ^~~~~~~~
a.cc:24:37: note: old declaration 'template<class T, class U> std::ostream& operator<<(std::ostream&, const std::pair<_T1, _T2>&)'
   24 | template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
      |                                     ^~~~~~~~
a.cc:163:28: error: ambiguating new declaration 'template<class Head> void print(Head&&)'
  163 | template <class Head> void print(Head&& head) {cout << head;print();}
      |                            ^~~~~
a.cc:26:28: note: old declaration 'template<class Head> void print(Head&&)'
   26 | template <class Head> void print(Head&& head) {cout << head;print();}
      |                            ^~~~~
a.cc:164:43: error: ambiguating new declaration 'template<class Head, class ... Tail> void print(Head&&, Tail&& ...)'
  164 | template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
      |                                           ^~~~~
a.cc:27:43: note: old declaration 'template<class Head, class ... Tail> void print(Head&&, Tail&& ...)'
   27 | template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
      |                                           ^~~~~
a.cc:165:25: error: ambiguating new declaration 'template<class T> void chmax(T&, T)'
  165 | template <class T> void chmax(T& a, const T b){a=max(a,b);}
      |                         ^~~~~
a.cc:28:25: note: old declaration 'template<class T> void chmax(T&, T)'
   28 | template <class T> void chmax(T& a, const T b){a=max(a,b);}
      |                         ^~~~~
a.cc:166:25: error: ambiguating new declaration 'template<class T> void chmin(T&, T)'
  166 | template <class T> void chmin(T& a, const T b){a=min(a,b);}
      |                         ^~~~~
a.cc:29:25: note: old declaration 'template<class T> void chmin(T&, T)'
   29 | template <class T> void chmin(T& a, const T b){a=min(a,b);}
      |                         ^~~~~
a.cc:174:25: error: redefinition of 'class Zarts<T>'
  174 | template<class T> class Zarts{
      |                         ^~~~~
a.cc:37:25: note: previous definition of 'class Zarts<T>'
   37 | template<class T> class Zarts{
      |                         ^~~~~
a.cc:189:5: error: redefinition of 'int main()'
  189 | int main() {
      |     ^~~~
a.cc:52:5: note: 'int main()' previously defined here
   52 | int main() {
      |     ^~~~