Submission #1288861

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288861		thieunguyenhuy	Road Construction (JOI21_road_construction)	C++20	6 / 100	1294 ms	17136 KiB

road_construction

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

#define POPCOUNT(n) (__builtin_popcountll((n)))
#define CLZ(n) (__builtin_clzll((n)))
#define CTZ(n) (__builtin_ctzll((n)))
#define LOG(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))

#define Int __int128
#define fi first
#define se second

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef vector<pair<int, int>> vii;
typedef vector<pair<long long, long long>> vll;
typedef vector<pair<long long, int>> vli;
typedef vector<pair<int, long long>> vil;

template <class T1, class T2> bool maximize(T1 &x, T2 y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <class T1, class T2> bool minimize(T1 &x, T2 y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template <class T> void remove_duplicate(vector<T> &ve) {
    sort (ve.begin(), ve.end());
    ve.resize(unique(ve.begin(), ve.end()) - ve.begin());
}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
long long random(long long l, long long r) {
    return uniform_int_distribution<long long>(l, r)(rng);
}
unsigned long long random(unsigned long long l, unsigned long long r) {
    return uniform_int_distribution<unsigned long long>(l, r)(rng);
}
template <class T> T random(T r) {
    return rng() % r;
}

const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;

int n, k;
pii a[N];
vector<ll> ans;

ll getDist(int i, int j) {
    return max(abs(a[i].fi - a[j].fi), abs(a[i].se - a[j].se));
}

int count(ll maxDist) {
	// xj < xi, yj < yi -> xi + yi - (xj + yj) <= maxDist
	// xj < xi, yj > yi -> xi - yi - (xj - yj) <= maxDist
    
    multiset<pii, greater<pii>> s; ans.clear();
	for (int i = 1, j = 1; i <= n; ++i) {
        while (!s.empty() && a[i].fi - a[j].fi > maxDist) {
            s.erase(make_pair(a[j].se, j));
            ++j;
        }

        // cerr << j << ' ' << i << ' ' << a[i].fi << ' ' << a[j].se << ' ' << maxDist << '\n';

        auto it = s.begin();
        while (it != s.end() && ans.size() < k && a[i].se - it->fi <= maxDist) {
            ans.emplace_back(getDist(i, it->se));
            // cerr << i << ' ' << it->se << '\n';
            it = next(it);
        }

        s.emplace(a[i].se, i);
	}

    return ans.size();
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    cin >> n >> k;

    for (int i = 1; i <= n; ++i) {
        int x, y; cin >> x >> y;
        a[i] = make_pair(x + y, x - y);
    }

    sort (a + 1, a + 1 + n);

	ll low = 0, high = 1e10, d = -1;
	while (low <= high) {
		ll mid = (low + high) >> 1;
		if (count(mid) < k) low = (d = mid) + 1;
        else high = mid - 1;
	}

    // cerr << d << '\n';

    count(d);
    while (ans.size() < k) ans.emplace_back(d + 1);
    sort (ans.begin(), ans.end());
    for (auto &x : ans) cout << x << '\n';
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35