#include using namespace std; #define overload4(_1, _2, _3, _4, name, ...) name #define rep1(n) for(int i = 0; i < (int)(n); ++i) #define rep2(i, n) for(int i = 0; i < (int)(n); ++i) #define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i) #define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c)) #define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__) #define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; --i) #define ALL(a) (a).begin(), (a).end() #define Sort(a) (sort((a).begin(), (a).end())) #define RSort(a) (sort((a).rbegin(), (a).rend())) #define UNIQUE(a) (a.erase(unique((a).begin(), (a).end()), (a).end())) using i64 = int64_t; using i128 = __int128_t; using ll = long long; using ul = unsigned long long; using ull = unsigned long long; using ld = long double; using vi = vector; using vll = vector; using vull = vector; using vc = vector; using vst = vector; using vd = vector; using vld = vector; using P = pair; template long long sum(const T &a){ return accumulate(a.begin(), a.end(), 0LL); } template auto min(const T &a){ return *min_element(a.begin(), a.end()); } template auto max(const T &a){ return *max_element(a.begin(), a.end()); } const long long MINF = 0x7fffffffffff; const long long INF = 0x1fffffffffffffff; const long long MOD = 998244353; const long double EPS = 1e-9; const long double PI = acos(-1); template inline bool chmax(T &a, T b) { if(a < b) { a = b; return 1; } return 0; } template inline bool chmin(T &a, T b) { if(a > b) { a = b; return 1; } return 0; } template istream &operator>>(istream &is, pair &p){ is >> p.first >> p.second; return is; } template ostream &operator<<(ostream &os, const pair &p){ os << "(" << p.first << ", " << p.second << ")"; return os; } template istream &operator>>(istream &is, vector &v){ for(T &in : v) is >> in; return is; } template ostream &operator<<(ostream &os, const vector &v){ for(int i = 0; i < (int) v.size(); ++i){ os << v[i] << (i + 1 != (int) v.size() ? " " : ""); } return os; } template ostream &operator<<(ostream &os, const map &mp){ for(auto &[key, val] : mp){ os << key << ":" << val << " "; } return os; } template ostream &operator<<(ostream &os, const set &st){ auto itr = st.begin(); for(int i = 0; i < (int) st.size(); ++i){ os << *itr << (i + 1 != (int) st.size() ? " " : ""); itr++; } return os; } template ostream &operator<<(ostream &os, const multiset &st){ auto itr = st.begin(); for(int i = 0; i < (int) st.size(); ++i){ os << *itr << (i + 1 != (int) st.size() ? " " : ""); itr++; } return os; } template ostream &operator<<(ostream &os, queue q){ while(q.size()){ os << q.front() << " "; q.pop(); } return os; } template ostream &operator<<(ostream &os, deque q){ while(q.size()){ os << q.front() << " "; q.pop_front(); } return os; } template ostream &operator<<(ostream &os, stack st){ while(st.size()){ os << st.top() << " "; st.pop(); } return os; } template ostream &operator<<(ostream &os, priority_queue pq){ while(pq.size()){ os << pq.top() << " "; pq.pop(); } return os; } template void inGraph(vector> &G, U n, U m, bool directed = true, bool zero_index = true){ G.resize(n); for(int i = 0; i < m; i++){ int a, b; cin >> a >> b; if(!zero_index) a--, b--; G[a].push_back(b); if(!directed) G[b].push_back(a); } } template long long binary_search(long long ok, long long ng, T check){ while(abs(ok - ng) > 1){ long long mid = (ok + ng) / 2; if(check(mid)) ok = mid; else ng = mid; } return ok; } template long double binary_search_real(long double ok, long double ng, T check, int iter = 100){ for(int i = 0; i < iter; ++i){ long double mid = (ok + ng) / 2; if(check(mid)) ok = mid; else ng = mid; } return ok; } long long trisum(long long a, long long b){ if(a > b) return 0; long long res = ((b - a + 1) * (a + b)) / 2; return res; } template T intpow(T x, int n){ T ret = 1; while(n > 0) { if(n & 1) (ret *= x); (x *= x); n >>= 1; } return ret; } template T getDivision(T a, T b){ if(b == 0) return -1; if(a >= 0 && b > 0){ return a / b; } else if(a < 0 && b > 0){ return a / b - (a % b != 0); } else if(a >= 0 && b < 0){ return a / b; } else{ return a / b + (a % b != 0); } } template T getReminder(T a, T b){ if(b == 0) return -1; if(a >= 0 && b > 0){ return a % b; } else if(a < 0 && b > 0){ return ((a % b) + b) % b; } else if(a >= 0 && b < 0){ return a % b; } else{ return (abs(b) - abs(a % b)) % b; } } template inline T vin(T &vec, U n) { vec.resize(n); for(int i = 0; i < (int) n; ++i) cin >> vec[i]; return vec; } template inline void vout(T vec, string s = "\n"){ for(auto x : vec) cout << x << s; } template void in(T&... a){ (cin >> ... >> a); } void out(){ cout << '\n'; } template void out(const T &a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; } void fout(){ cout << endl; } template void fout(const T &a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << endl; } void debug(){ cerr << '\n'; } template void debug(const T &a, const Ts&... b){ cerr << a; (cerr << ... << (cerr << ' ', b)); cerr << '\n'; } template struct BinaryIndexedTree{ int N; std::vector BIT; BinaryIndexedTree(const int N) : N(N), BIT(N + 1, 0){ } T get(int i){ return sum(i + 1) - sum(i); } void add(int i, T x){ i++; while(i <= N){ BIT[i] += x; i += i & -i; } } T sum(int i) const { T ans = 0; while(i > 0){ ans += BIT[i]; i -= i & -i; } return ans; } T sum(int L, int R) const { return sum(R) - sum(L); } int lower_bound(T x) const { if(x <= 0){ return 0; } else{ int v = 0, r = 1; while(r < N) r = r << 1; for(int len = r; len > 0; len = len >> 1){ if(v + len < N && BIT[v + len] < x){ x -= BIT[v + len]; v += len; } } return v; } } int upper_bound(T x) const { if(x < 0){ return 0; } else{ int v = 0, r = 1; while(r <= N) r = r << 1; for(int len = r; len > 0; len = len >> 1){ if(v + len <= N && BIT[v + len] <= x){ x -= BIT[v + len]; v += len; } } return v; } } T operator [](int i) const { return sum(i, i + 1); } }; template struct compress{ std::vector sorted; std::vector compressed; compress(const std::vector &vec){ int n = vec.size(); compressed.resize(n); for(T x : vec){ sorted.emplace_back(x); } std::sort(sorted.begin(), sorted.end()); sorted.erase(std::unique(sorted.begin(), sorted.end()), sorted.end()); for(int i = 0; i < n; ++i){ compressed[i] = std::lower_bound(sorted.begin(), sorted.end(), vec[i]) - sorted.begin(); } } int get(const T &x) const{ return std::lower_bound(sorted.begin(), sorted.end(), x) - sorted.begin(); } int getr(const T &x) const{ return std::upper_bound(sorted.begin(), sorted.end(), x) - sorted.begin(); } T inv(const int x) const{ return sorted[x]; } size_t size() const{ return sorted.size(); } std::vector getCompressed() const{ return compressed; } }; ll T; void input(){ in(T); } void solve(){ ll n, h, w; in(n, h, w); vll x(n), y(n); vll xv, yv; rep(i, n){ in(x[i], y[i]); x[i]--, y[i]--; xv.push_back(x[i]); xv.push_back(x[i] + h); yv.push_back(y[i]); yv.push_back(y[i] + w); } compress cx(xv), cy(yv); ll lenx = cx.size(), leny = cy.size(); BinaryIndexedTree cntx(lenx), cnty(leny), valx(lenx), valy(leny); rep(i, n){ cntx.add(cx.get(x[i]), 1); cntx.add(cx.get(x[i] + h), 1); valx.add(cx.get(x[i]), x[i]); valx.add(cx.get(x[i] + h), x[i] + h); cnty.add(cy.get(y[i]), 1); cnty.add(cy.get(y[i] + w), 1); valy.add(cy.get(y[i]), y[i]); valy.add(cy.get(y[i] + w), y[i] + w); } ll resx = 0, resy = 0; auto fx = [&](ll x1){ ll res = cntx.sum(cx.get(x1 - h / 2), cx.get(x1)) * x1; res -= valx.sum(cx.get(x1 - h / 2), cx.get(x1)); res += valx.sum(cx.get(x1), cx.get(x1 + (h + 1) / 2)); res -= cntx.sum(cx.get(x1), cx.get(x1 + (h + 1) / 2)) * x1; return res; }; auto fy = [&](ll y1){ ll res = cnty.sum(cy.get(y1 - w / 2), cy.get(y1)) * y1; res -= valy.sum(cy.get(y1 - w / 2), cy.get(y1)); res += valy.sum(cy.get(y1), cy.get(y1 + (w + 1) / 2)); res -= cnty.sum(cy.get(y1), cy.get(y1 + (w + 1) / 2)) * y1; return res; }; rep(i, n){ chmax(resx, fx(x[i] + h / 2)); chmax(resx, fx(x[i] + (h + 1) / 2)); chmax(resy, fy(y[i] + w / 2)); chmax(resy, fy(y[i] + (w + 1) / 2)); } out(resx + resy); } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(20); T = 1; // input(); while(T--) solve(); }