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답안 #1116182

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1116182 2024-11-21T10:13:20 Z _callmelucian Road Construction (JOI21_road_construction) C++14
100 / 100
 7130 ms 19816 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pl;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tpl;

#define all(a) a.begin(), a.end()
#define filter(a) a.erase(unique(all(a)), a.end())

const int mn = 250003;
vector<ll> cmpSum, cmpDiff;
pl a[mn];
ll n;

struct BIT {
    vector<int> tr;
    BIT (int sz) : tr(sz + 1) {}

    int p (int k) { return k & -k; }

    void update (int k, int val) {
        for (; k < tr.size(); k += p(k)) tr[k] += val;
    }

    int preSum (int k, int ans = 0) {
        for (; k; k -= p(k)) ans += tr[k];
        return ans;
    }

    void refresh() { fill(all(tr), 0); }
} treeSum(mn), treeDiff(mn);

int getSum (ll targ) {
    return lower_bound(all(cmpSum), targ) - cmpSum.begin() + 1;
}

int getDiff (ll targ) {
    return lower_bound(all(cmpDiff), targ) - cmpDiff.begin() + 1;
}

int pointSum (int i) {
    ll x, y; tie(x, y) = a[i];
    return lower_bound(all(cmpSum), x + y) - cmpSum.begin() + 1;
}

int pointDiff (int i) {
    ll x, y; tie(x, y) = a[i];
    return lower_bound(all(cmpDiff), x - y) - cmpDiff.begin() + 1;
}

ll countClose (ll ub) {
    ll cnt = 0;
    treeSum.refresh(), treeDiff.refresh();
    for (int L = 0, R = 0; R < n; R++) {
        treeSum.update(pointSum(R), 1);
        treeDiff.update(pointDiff(R), 1);
        while (a[R].first - a[L].first > ub) {
            treeSum.update(pointSum(L), -1);
            treeDiff.update(pointDiff(L), -1);
            L++;
        }
        cnt += L;

        ll x, y; tie(x, y) = a[R];
        cnt += treeSum.preSum(getSum(x + y - ub) - 1);
        cnt += treeDiff.preSum(getDiff(x - y - ub) - 1);
    }
    return n * (n - 1) / 2 - cnt;
}

ll distance (ll x, ll y, ll i, ll j) {
    return abs(x - i) + abs(y - j);
}

void getPoints (ll ub, vector<ll> &ans) {
    set<pl> s;
    for (int L = 0, R = 0; R < n; R++) {
        ll x, y; tie(x, y) = a[R];
        s.emplace(y, x);

        while (a[R].first - a[L].first > ub) {
            ll x, y; tie(x, y) = a[L++];
            s.erase(make_pair(y, x));
        }

        for (auto it = s.lower_bound(make_pair(y - ub, 0)); it != s.end() && it->first <= y + ub; it++) {
            ll cur = distance(it->second, it->first, x, y);
            if (0 < cur && cur <= ub) ans.push_back(cur);
        }
    }
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    ll k; cin >> n >> k;
    for (int i = 0; i < n; i++) {
        ll x, y; cin >> x >> y;
        cmpSum.push_back(x + y), cmpDiff.push_back(x - y);
        a[i] = {x, y};
    }
    sort(a, a + n), sort(all(cmpSum)), sort(all(cmpDiff));
    filter(cmpSum), filter(cmpDiff);

    ll ans = 0, save = 0;
    for (ll mask = 1LL << 31; mask > 0; mask >>= 1) {
        ll cur = countClose(ans | mask);
        if (cur < k) ans |= mask, save = cur;
    }

    vector<ll> vec;
    getPoints(ans, vec);
    sort(all(vec));

    for (ll u : vec) cout << u << "\n";
    for (int i = 0; i < k - save; i++) cout << ans + 1 << "\n";

    return 0;
}

Compilation message

road_construction.cpp: In member function 'void BIT::update(int, int)':
road_construction.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for (; k < tr.size(); k += p(k)) tr[k] += val;
      |                ~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 7248 KB Output is correct
2 Correct 45 ms 7224 KB Output is correct
3 Correct 40 ms 7112 KB Output is correct
4 Correct 39 ms 7112 KB Output is correct
5 Correct 42 ms 5976 KB Output is correct
6 Correct 9 ms 2556 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2191 ms 17512 KB Output is correct
2 Correct 2312 ms 17324 KB Output is correct
3 Correct 36 ms 7112 KB Output is correct
4 Correct 2265 ms 17532 KB Output is correct
5 Correct 2129 ms 17424 KB Output is correct
6 Correct 2237 ms 17520 KB Output is correct
7 Correct 2127 ms 17644 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5889 ms 15724 KB Output is correct
2 Correct 5748 ms 15724 KB Output is correct
3 Correct 3 ms 2384 KB Output is correct
4 Correct 2118 ms 13556 KB Output is correct
5 Correct 2326 ms 16044 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5889 ms 15724 KB Output is correct
2 Correct 5748 ms 15724 KB Output is correct
3 Correct 3 ms 2384 KB Output is correct
4 Correct 2118 ms 13556 KB Output is correct
5 Correct 2326 ms 16044 KB Output is correct
6 Correct 5879 ms 15728 KB Output is correct
7 Correct 6052 ms 15724 KB Output is correct
8 Correct 4 ms 2384 KB Output is correct
9 Correct 4 ms 2384 KB Output is correct
10 Correct 5818 ms 15728 KB Output is correct
11 Correct 2244 ms 13568 KB Output is correct
12 Correct 2251 ms 15980 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 7248 KB Output is correct
2 Correct 45 ms 7224 KB Output is correct
3 Correct 40 ms 7112 KB Output is correct
4 Correct 39 ms 7112 KB Output is correct
5 Correct 42 ms 5976 KB Output is correct
6 Correct 9 ms 2556 KB Output is correct
7 Correct 2484 ms 12440 KB Output is correct
8 Correct 2541 ms 12452 KB Output is correct
9 Correct 38 ms 7112 KB Output is correct
10 Correct 2203 ms 11688 KB Output is correct
11 Correct 1958 ms 11600 KB Output is correct
12 Correct 737 ms 10240 KB Output is correct
13 Correct 854 ms 11532 KB Output is correct

Subtask #6
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 7248 KB Output is correct
2 Correct 45 ms 7224 KB Output is correct
3 Correct 40 ms 7112 KB Output is correct
4 Correct 39 ms 7112 KB Output is correct
5 Correct 42 ms 5976 KB Output is correct
6 Correct 9 ms 2556 KB Output is correct
7 Correct 2191 ms 17512 KB Output is correct
8 Correct 2312 ms 17324 KB Output is correct
9 Correct 36 ms 7112 KB Output is correct
10 Correct 2265 ms 17532 KB Output is correct
11 Correct 2129 ms 17424 KB Output is correct
12 Correct 2237 ms 17520 KB Output is correct
13 Correct 2127 ms 17644 KB Output is correct
14 Correct 5889 ms 15724 KB Output is correct
15 Correct 5748 ms 15724 KB Output is correct
16 Correct 3 ms 2384 KB Output is correct
17 Correct 2118 ms 13556 KB Output is correct
18 Correct 2326 ms 16044 KB Output is correct
19 Correct 5879 ms 15728 KB Output is correct
20 Correct 6052 ms 15724 KB Output is correct
21 Correct 4 ms 2384 KB Output is correct
22 Correct 4 ms 2384 KB Output is correct
23 Correct 5818 ms 15728 KB Output is correct
24 Correct 2244 ms 13568 KB Output is correct
25 Correct 2251 ms 15980 KB Output is correct
26 Correct 2484 ms 12440 KB Output is correct
27 Correct 2541 ms 12452 KB Output is correct
28 Correct 38 ms 7112 KB Output is correct
29 Correct 2203 ms 11688 KB Output is correct
30 Correct 1958 ms 11600 KB Output is correct
31 Correct 737 ms 10240 KB Output is correct
32 Correct 854 ms 11532 KB Output is correct
33 Correct 7130 ms 19700 KB Output is correct
34 Correct 7052 ms 19696 KB Output is correct
35 Correct 5878 ms 19568 KB Output is correct
36 Correct 2064 ms 17580 KB Output is correct
37 Correct 2073 ms 17576 KB Output is correct
38 Correct 2243 ms 19816 KB Output is correct