oj.uz

Submission #1112074

# Submission time Handle Problem Language Result Execution time Memory
1112074 2024-11-13T16:04:56 Z Sharky Road Construction (JOI21_road_construction) C++17
38 / 100
 10000 ms 62336 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
const int N = 2.5e5 + 10;
int n, k;
array<int, 2> a[N];
map<int, vector<int>> mp;
vector<int> ans;

bool check(int di, bool add) {
    // cout << "exh: " << di << '\n';
    map<int, vector<int>> f;
    int cnt = 0;
    int lb = -1e18, rb = -1e18;
    for (int i = 1; i <= n; i++) {
        int x = a[i][0] - a[i][1], y = a[i][0] + a[i][1];
        for (auto it = mp.lower_bound(lb); it != mp.end() && it->first < x - di; it++) {
            auto& ri = it->second;
            int lef = it->first;
            for (auto& v : it->second) {
                f[v].erase(f[v].begin());
                // cout << v << " erase " << it->first << '\n';
            }
        }
        for (auto it = mp.lower_bound(max(x - di, rb + 1)); it != mp.end() && it->first <= x; it++) {
            auto& ri = it->second;
            int lef = it->first;
            for (auto& v : ri) {
                f[v].push_back(lef);
                // cout << v << " insert " << it->first << '\n';
            }
        }
        for (auto it = f.lower_bound(y-di); it != f.end() && it->first <= y + di; it++) {
            int lef = it->first;
            auto& ri = it->second;
            int sz = ri.size();
            if (lef == y) sz--;
            // cout << x << ' ' << y << ' ' << it->first << ' ' << sz << '\n';
            // int ex = min(sz, k - cnt);
            // cnt += ex;
            // if (add) {
                for (auto v : ri) {
                    if (lef == y && v == x) continue;
                    if (x == v && y > lef) continue;
                    // cout << '(' << x << ',' << y << ')' << ' ' << '(' << v << ',' << it->first << ')' << '\n';
                    cnt++;
                    if (add) ans.push_back(max(abs(it->first - y), abs(v - x)));
                    if (cnt >= k) return true;
                    // if (ans.size() >= k) return true;
                }
            // }
            if (cnt >= k) {
                // cout << "true!\n";
                return true;
            }
        }
        lb = max(lb, x - di);
        rb = x;
    }
    // cout << "false!\n";
    return false;
}

int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i][0] >> a[i][1];
        mp[a[i][0] - a[i][1]].push_back(a[i][0] + a[i][1]);
    }
    sort(a + 1, a + n + 1, [] (array<int, 2> x, array<int, 2> y) {
        return x[0] - x[1] < y[0] - y[1];
    });
    for (auto& [st, v] : mp) sort(v.begin(), v.end());
    int l = 1, r = 5e9;
    while (l < r) {
        int mid = (l + r) >> 1;
        if (check(mid, 0)) r = mid;
        else l = mid + 1;
    }
    // cout << "var: " << l-1 << '\n';
    check(l-1, 1);
    // for (auto x : ans) cout << x << ' ';
    // cout << '\n';
    sort(ans.begin(), ans.end());
    while (ans.size() < k) ans.push_back(l);
    for (int i = 0; i < k; i++) cout << ans[i] << '\n';
    return 0;
}
/*
5 4
-2 2
-1 -1
2 0
2 2
2 -2
*/

Compilation message

road_construction.cpp: In function 'bool check(long long int, bool)':
road_construction.cpp:19:19: warning: unused variable 'ri' [-Wunused-variable]
   19 |             auto& ri = it->second;
      |                   ^~
road_construction.cpp:20:17: warning: unused variable 'lef' [-Wunused-variable]
   20 |             int lef = it->first;
      |                 ^~~
road_construction.cpp: In function 'int32_t main()':
road_construction.cpp:87:23: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   87 |     while (ans.size() < k) ans.push_back(l);
      |            ~~~~~~~~~~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 129 ms 5304 KB Output is correct
2 Correct 123 ms 5308 KB Output is correct
3 Correct 96 ms 5324 KB Output is correct
4 Correct 90 ms 5368 KB Output is correct
5 Correct 107 ms 4136 KB Output is correct
6 Correct 3 ms 336 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3227 ms 62224 KB Output is correct
2 Correct 3450 ms 62336 KB Output is correct
3 Correct 104 ms 5060 KB Output is correct
4 Correct 2675 ms 61980 KB Output is correct
5 Correct 2650 ms 62280 KB Output is correct
6 Correct 2486 ms 62228 KB Output is correct
7 Correct 1769 ms 61644 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2647 ms 59148 KB Output is correct
2 Correct 4675 ms 59152 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1622 ms 59156 KB Output is correct
5 Correct 768 ms 7504 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2647 ms 59148 KB Output is correct
2 Correct 4675 ms 59152 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1622 ms 59156 KB Output is correct
5 Correct 768 ms 7504 KB Output is correct
6 Correct 5954 ms 59152 KB Output is correct
7 Correct 5494 ms 59148 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 5345 ms 54868 KB Output is correct
11 Correct 1511 ms 59152 KB Output is correct
12 Correct 726 ms 7532 KB Output is correct

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 129 ms 5304 KB Output is correct
2 Correct 123 ms 5308 KB Output is correct
3 Correct 96 ms 5324 KB Output is correct
4 Correct 90 ms 5368 KB Output is correct
5 Correct 107 ms 4136 KB Output is correct
6 Correct 3 ms 336 KB Output is correct
7 Execution timed out 10017 ms 24536 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #6
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 129 ms 5304 KB Output is correct
2 Correct 123 ms 5308 KB Output is correct
3 Correct 96 ms 5324 KB Output is correct
4 Correct 90 ms 5368 KB Output is correct
5 Correct 107 ms 4136 KB Output is correct
6 Correct 3 ms 336 KB Output is correct
7 Correct 3227 ms 62224 KB Output is correct
8 Correct 3450 ms 62336 KB Output is correct
9 Correct 104 ms 5060 KB Output is correct
10 Correct 2675 ms 61980 KB Output is correct
11 Correct 2650 ms 62280 KB Output is correct
12 Correct 2486 ms 62228 KB Output is correct
13 Correct 1769 ms 61644 KB Output is correct
14 Correct 2647 ms 59148 KB Output is correct
15 Correct 4675 ms 59152 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1622 ms 59156 KB Output is correct
18 Correct 768 ms 7504 KB Output is correct
19 Correct 5954 ms 59152 KB Output is correct
20 Correct 5494 ms 59148 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 5345 ms 54868 KB Output is correct
24 Correct 1511 ms 59152 KB Output is correct
25 Correct 726 ms 7532 KB Output is correct
26 Execution timed out 10017 ms 24536 KB Time limit exceeded
27 Halted 0 ms 0 KB -