oj.uz

Submission #560409

# Submission time Handle Problem Language Result Execution time Memory
560409 2022-05-11T11:10:59 Z Yazan_Alattar Autobahn (COI21_autobahn) C++14
100 / 100
 292 ms 43216 KB 
    #include <bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    typedef unsigned long long ull;
    #define F first
    #define S second
    #define pb push_back
    #define endl "\n"
    #define all(x) x.begin(), x.end()
    const int M = 2000007;
    const ll inf = 2e9;
    const ll mod = 1e9 + 7;
    const double pi = acos(-1);
    const double eps = 1e-6;
    const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
    const int block = 320;

    vector <ll> v;
    ll n, k, x, l[M], t[M], r[M], cnt[M], tot[M], pref[M], ans;

    void add(ll pos){
        v.pb(pos);
        v.pb(pos + x - 1);
        v.pb(pos - x + 1);
        return;
    }

    ll get(ll val){
        return lower_bound(all(v), val) - v.begin() + 1;
    }

    int main(){
        ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
        cin >> n >> k >> x;
        for(int i = 1; i <= n; ++i){
            cin >> l[i] >> t[i] >> r[i];

            add(l[i]);
            add(l[i] + t[i]);
            add(r[i]);
            add(r[i] + 1);
        }

        sort(all(v));
        v.erase(unique(all(v)), v.end());

        for(int i = 1; i <= n; ++i){
            int to = get(r[i] + 1);
            ++cnt[get(l[i])];
            --cnt[to];

            ++tot[get(l[i] + t[i])];
            --tot[to];
        }
        for(int i = 1; i <= v.size(); ++i) cnt[i] += cnt[i - 1], tot[i] += tot[i - 1];

        for(int i = 1; i <= v.size(); ++i){
            pref[i] = pref[i - 1];
            if(cnt[i - 1] >= k) pref[i] += (v[i - 1] - v[i - 2]) * tot[i - 1]; // [l, r[
        }

        for(int i = 0; i < v.size(); ++i){
            int posi = i + 1;
            int posj = get(v[i] + x - 1);

            if(posj > v.size()) break;
            if(v[posj - 1] != v[i] + x - 1) continue;

            ans = max(ans, pref[posj] - pref[posi] + (cnt[posj] >= k) * tot[posj]);
        }
        cout << ans << endl;
        return 0;
    }

Compilation message

autobahn.cpp: In function 'int main()':
autobahn.cpp:55:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for(int i = 1; i <= v.size(); ++i) cnt[i] += cnt[i - 1], tot[i] += tot[i - 1];
      |                        ~~^~~~~~~~~~~
autobahn.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         for(int i = 1; i <= v.size(); ++i){
      |                        ~~^~~~~~~~~~~
autobahn.cpp:62:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         for(int i = 0; i < v.size(); ++i){
      |                        ~~^~~~~~~~~~
autobahn.cpp:66:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |             if(posj > v.size()) break;
      |                ~~~~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 1 ms 592 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 596 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 1 ms 592 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 596 KB Output is correct
21 Correct 292 ms 43032 KB Output is correct
22 Correct 270 ms 43144 KB Output is correct
23 Correct 265 ms 43088 KB Output is correct
24 Correct 249 ms 43032 KB Output is correct
25 Correct 251 ms 43216 KB Output is correct
26 Correct 256 ms 43104 KB Output is correct
27 Correct 234 ms 43104 KB Output is correct
28 Correct 242 ms 43104 KB Output is correct
29 Correct 241 ms 43128 KB Output is correct