#include <bits/stdc++.h>  // clang-format off
using Int = long long;
#define REP_(i, a_, b_, a, b, ...) for (Int i = (a), lim##i = (b); i < lim##i; i++)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
struct SetupIO { SetupIO() { std::cin.tie(nullptr), std::ios::sync_with_stdio(false), std::cout << std::fixed << std::setprecision(13); } } setup_io;
#ifndef dump
#define dump(...)
#endif  // clang-format on

/**
 *    author:  knshnb
 *    created: Fri Jun  5 22:30:45 JST 2020
 **/

const Int INF = 1e9;
struct Plane {
    std::map<Int, Int> mp;
    Plane() {
        mp[0] = INF;
        mp[INF] = 0;
    }
    Int area(std::map<Int, Int>::iterator it) {
        Int dx = it->first - std::prev(it)->first;
        Int dy = it->second - std::next(it)->second;
        return dx * dy;
    }
    // return difference of area
    Int add(Int x, Int y) {
        if (mp.lower_bound(x)->second >= y) return 0;
        Int dif = 0;
        while (1) {
            auto it = std::prev(mp.upper_bound(x));
            if (it->second > y) break;
            dif -= area(it);
            mp.erase(it);
        }
        mp[x] = y;
        dif += area(mp.find(x));
        return dif;
    }
};

signed main() {
    Int n;
    std::cin >> n;
    std::vector<Plane> ps(4);
    REP(i, n) {
        Int xa, ya, xb, yb;
        std::cin >> xa >> ya >> xb >> yb;
        Int ans = 0;
        ans += ps[0].add(xb, yb);
        ans += ps[1].add(-xa, yb);
        ans += ps[2].add(xb, -ya);
        ans += ps[3].add(-xa, -ya);
        std::cout << ans << "\n";
    }
}