#define CPP17
#include <limits>
#include <initializer_list>
#include <utility>
#include <bitset>
#include <tuple>
#include <type_traits>
#include <functional>
#include <string>
#include <array>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <iterator>
#include <algorithm>
#include <complex>
#include <random>
#include <numeric>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <regex>
#include <cassert>
#include <cstddef>
#ifdef CPP17
#include <variant>
#endif

// Yay!!
#define endl codeforces

// macros for iterator
#define ALL(v) std::begin(v), std::end(v)
#define ALLR(v) std::rbegin(v), std::rend(v)

// alias
using ll = std::int64_t;
using ull = std::uint64_t;
using pii = std::pair<int, int>;
using tii = std::tuple<int, int, int>;
using pll = std::pair<ll, ll>;
using tll = std::tuple<ll, ll, ll>;
template <typename T> using vec = std::vector<T>;
template <typename T> using vvec = vec<vec<T>>;

// variadic min/max
template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); }

// variadic chmin/chmax
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }

// multi demension array
template <typename T, std::size_t Head, std::size_t... Tail> struct multi_dim_array { using type = std::array<typename multi_dim_array<T, Tail...>::type, Head>; };
template <typename T, std::size_t Head> struct multi_dim_array<T, Head> { using type = std::array<T, Head>; };
template <typename T, std::size_t... Args> using mdarray = typename multi_dim_array<T, Args...>::type;

#ifdef CPP17
// fill container
template <typename T, typename F, typename... Args> 
void fill_seq(T &t, F f, Args... args) { if constexpr (std::is_invocable<F, Args...>::value) { t = f(args...); } else { for (ssize_t i = 0; i < t.size(); i++) fill_seq(t[i], f, args..., i); } }
#endif

// make multi dimension vector
template <typename T> vec<T> make_v(ssize_t sz) { return vec<T>(sz); }
template <typename T, typename... Tail> auto make_v(ssize_t hs, Tail&&... ts) { auto v = std::move(make_v<T>(std::forward<Tail>(ts)...)); return vec<decltype(v)>(hs, v); }

// init
namespace init__ { 
struct InitIO { InitIO() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << std::fixed << std::setprecision(30); } } init_io; 
}


namespace utility {

template <typename T>
using validate_integer = typename std::enable_if<std::is_integral<T>::value, ll>::type;

template <typename T>
auto popcount(T n) -> validate_integer<T> {
    return __builtin_popcount(n);
}

// 0 indexed
template <typename T>
auto msb(T n) -> validate_integer<T> {
    return 64 - __builtin_clzll(n) - 1;
}

template <typename T>
constexpr auto ceil_pow2(T s) -> validate_integer<T> {
    ll ret = 1;
    while (ret < s) ret *= 2;
    return ret;
}

}

namespace utility {

struct has_id_ele {
    template <typename T>
    auto operator ()(T &&t) -> decltype(T::id_ele(), std::true_type()) { return std::true_type(); }
    std::false_type operator ()(...) { return std::false_type(); }
};

struct has_merge {
    template <typename T>
    auto operator ()(T &&t) -> decltype(T::merge(std::declval<T>(), std::declval<T>()), std::true_type()) { return std::true_type(); }
    std::false_type operator ()(...) { return std::false_type(); }
};

struct has_apply {
    template <typename M, typename Op>
    auto operator ()(M &&m, Op &&op) -> decltype(m.apply(op), std::true_type()) { return std::true_type(); }
    std::false_type operator ()(...) { return std::false_type(); }
};

template <typename F, typename... Args>
using callable = std::is_same<typename std::invoke_result<F, Args...>::type, std::true_type>;

template <typename M>
using is_monoid = std::conjunction<
    callable<has_id_ele, M>, callable<has_merge, M>>;

template <typename M, typename Op>
using enable_apply = callable<has_apply, M, Op>;

}

namespace segtree {

template <typename M, typename Op>
class LazySegmentTree {
    static_assert(utility::is_monoid<M>::value, "M must be monoid.");
    static_assert(utility::is_monoid<Op>::value, "Op must be monoid.");
    static_assert(utility::enable_apply<M, Op>::value, "Op is not operator of M.");
    
    using size_type = ssize_t;

    struct segment {
        M m;
        Op op;
        bool has_lazy;

        segment(M m = M::id_ele()) : m(m), op(Op::id_ele()), has_lazy(false) { }

        void update_op(Op o) {
            op = Op::merge(op, o);
            has_lazy = true;
        }

        void apply() {
            if (!has_lazy) return;
            m.apply(op);
            init_op();
        }

        void init_op() {
            op = Op::id_ele();
            has_lazy = false;
        }
    };

    vec<segment> segs;
    size_type height;

    void push(size_type idx) {
        auto &seg = segs[idx];
        if (!seg.has_lazy) return;
        auto tmp = seg.op;
        seg.apply();
        for (int i = 0; i < 2; i++) {
            auto cidx = 2 * idx + i;
            if (2 * size() <= cidx) break;
            auto &cseg = segs[cidx];
            cseg.update_op(tmp);
        }
    }

    void propagate_from_top(size_type idx) {
        for (int i = height; 1 <= i; i--) push(idx >> i);
    }

    void update_from_bottom(size_type idx) {
        while (true) {
            auto pidx = idx / 2;
            if (pidx == 0) break;
            push(2 * pidx);
            push(2 * pidx + 1);
            segs[pidx].m = M::merge(segs[2 * pidx].m, segs[2 * pidx + 1].m);
            idx = pidx;
        }
    }

    size_type get_endpoint_seg(size_type i) {
        i += size();
        return i / (i & -i);
    }

public:
    template <typename T>
    LazySegmentTree(const vec<T> &v) {
        size_type sz = utility::ceil_pow2(v.size());
        segs.resize(sz * 2);
        height = utility::msb(sz);
        for (auto i = 0; i < v.size(); i++) segs[i + sz] = v[i];
        for (auto i = sz - 1; 1 <= i; i--) segs[i] = M::merge(segs[2 * i].m, segs[2 * i + 1].m);
    }

    size_type size() const {
        return segs.size() / 2;
    }

    template <typename T>
    void update_query(size_type ql, size_type qr, const T &t) {
        Op op(t);
        auto l0 = get_endpoint_seg(ql);
        auto r0 = get_endpoint_seg(qr);
        propagate_from_top(l0);
        propagate_from_top(r0);
        size_type lnode = ql + size(), rnode = qr + size();
        while (lnode < rnode) {
            if (lnode & 1) {
                segs[lnode].update_op(op);
                push(lnode);
                lnode++;
            }
            if (rnode & 1) {
                rnode--;
                segs[rnode].update_op(op);
                push(rnode);
            }
            lnode /= 2;
            rnode /= 2;
        }
        update_from_bottom(l0);
        update_from_bottom(r0);
    }

    M get_query(ll ql, ll qr) {
        auto ret = M::id_ele();
        auto l0 = get_endpoint_seg(ql);
        auto r0 = get_endpoint_seg(qr);
        propagate_from_top(l0);
        propagate_from_top(r0);
        size_type lnode = ql + size(), rnode = qr + size();
        while (lnode < rnode) {
            if (lnode & 1) {
                push(lnode);
                ret = M::merge(segs[lnode].m, ret);
                lnode++;
            }
            if (rnode & 1) {
                rnode--;
                push(rnode);
                ret = M::merge(ret, segs[rnode].m);
            }
            lnode /= 2;
            rnode /= 2;
        }
        return ret;
    }
};

}

namespace utility {

template <typename T>
struct Compressor {
    using size_type = ssize_t;

    Compressor(vec<T> arg) : v(std::move(arg)) {
        std::sort(ALL(v));
        auto ite = std::unique(ALL(v));
        v.erase(ite, v.end());
    }

    const T& operator [](size_type i) const {
        return v[i];
    }

    size_type get(const T &t) const {
        return std::distance(v.begin(),
                             std::lower_bound(ALL(v), t));
    }

    size_type size() const {
        return v.size();
    }

    template <typename U = T>
    vec<U> compress(const vec<T> &v) const {
        vec<U> ret(v.size());
        for (size_type i = 0; i < v.size(); i++) ret[i] = get(v[i]);
        return ret;
    }

private:
    vec<T> v;
};

};
    
const ssize_t SIZE = 20010;

struct Op {
    Op() { }
    static Op id_ele() { return Op(); }
    static Op merge(Op a, Op b) { return Op(); }
};

struct M {
    ll l, r;
    pll rng;
    
    M(ll l, ll r, pll rng) : l(l), r(r), rng(rng) { }

    static M id_ele() { return M(-SIZE, -SIZE, pll(-SIZE, -SIZE)); }
    
    static M merge(M a, M b) {
        if (b.l == -SIZE) return a;
        if (a.l == -SIZE) return b;
        ll l = std::min(a.l, b.l);
        ll r = std::max(a.r, b.r);
        pll rng = merge_rng(a.rng, b.rng);
        return M(l, r, rng);
    }
    
    void apply(Op o) { rng = pll(l, r); }

    static ll get_rng_l(ll a, ll b) {
        if (a == -SIZE) return b;
        if (b == -SIZE) return a;
        return std::min(a, b);
    }
    
    static ll get_rng_r(ll a, ll b) {
        if (a == -SIZE) return b;
        if (b == -SIZE) return a;
        return std::max(a, b);
    }

    static pll merge_rng(pll p, pll q) {
        auto [ a, b ] = p;
        auto [ c, d ] = q;
        return pll(get_rng_l(a, c), get_rng_r(b, d));
    }
};


int main() {
    using square = std::tuple<ll, ll, ll, ll>;
    using lst_type = segtree::LazySegmentTree<M, Op>;
    
    ll n;
    std::cin >> n;
    vec<M> init_v;
    init_v.reserve(2 * SIZE);
    vec<square> sv(n);
    for (auto &&e : sv) {
        ll a, b, c, d;
        std::cin >> a >> b >> c >> d;
        e = square(a, b, c, d);
    }

    for (ll i = 0; i < 2 * SIZE; i++) init_v.push_back(M(i, i + 1, pll(-SIZE, -SIZE)));

    auto len = [](pll p) {
        auto [ a, b ] = p;
        return b - a;
    };

    vec<lst_type> lstv(2 * SIZE, lst_type(init_v));
    for (auto &&e : sv) {
        auto [ xa, ya, xb, yb ] = e;
        ll ans = 0;
        for (ll y = ya; y < yb; y++) {
            pll a = lstv[y + SIZE].get_query(0, 2 * SIZE).rng;
            lstv[y + SIZE].update_query(xa + SIZE, xb + SIZE, Op());
            pll b = lstv[y + SIZE].get_query(0, 2 * SIZE).rng;
            ans += len(b) - len(a);
        }
        std::cout << ans << "\n";
    }
    return 0;
}