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Submission #1002813

# Submission time Handle Problem Language Result Execution time Memory
1002813 2024-06-19T19:57:57 Z mariaclara Autobahn (COI21_autobahn) C++17
100 / 100
 751 ms 65976 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
const int MAXN = 1e5+5;
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pb push_back
#define fr first
#define sc second

int n, k, x;
map<int,ll> qtd, val, pref;
set<int> zerar;

ll prefix(int ind) {
    auto ptr = pref.upper_bound(ind);
    if(ptr == pref.begin()) return 0;
    ptr--;
    ll resp = (*ptr).sc + val[(*ptr).fr] * (ind - (*ptr).fr);
    return resp;
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> k >> x;

    for(int i = 0, a, b, c; i < n; i++) {
        cin >> a >> c >> b;
        qtd[a]++;
        qtd[b+1]--;
        val[a+c]++;
        val[b+1]--;
        if(qtd.count(a+c) == 0) qtd[a+c] = 0;
        if(val.count(a) == 0) val[a] = 0;
    }

    int at = 0;
    for(auto [ind, a] : qtd) {
        at += a;
        qtd[ind] = at;
        if(at < k) zerar.insert(ind); 
    }

    at = 0;
    ll p = 0, last_ind = 0, last_val = 0;
    for(auto [ind, a] : val) {
        at += a;
        int at2 = at;
        if(zerar.count(ind)) at2 = 0;
        p += last_val * (ind - last_ind);
        pref[ind] = p + at2;
        val[ind] = at2;

        last_ind = ind;
        last_val = at2;
    }

    ll ans = 0;
    for(auto [ind, a] : val) {
        ll a1 = prefix(ind) - prefix(ind - x);
        ll a2 = prefix(ind + x - 1) - prefix(ind - 1);
        ll a3 = prefix(ind + x - 2) - prefix(ind - 2);
        ll a4 = prefix(ind - 1) - prefix(ind - x - 1);
        //cout << ind << " " << a1 << " " << a2 << "\n";
        ans = max({ans, a1, a2, a3, a4});
    }

    cout << ans << "\n";
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 600 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 2 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 600 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 600 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 2 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 600 KB Output is correct
21 Correct 746 ms 65620 KB Output is correct
22 Correct 733 ms 65620 KB Output is correct
23 Correct 751 ms 65616 KB Output is correct
24 Correct 744 ms 65620 KB Output is correct
25 Correct 733 ms 65872 KB Output is correct
26 Correct 698 ms 65976 KB Output is correct
27 Correct 634 ms 65872 KB Output is correct
28 Correct 682 ms 65620 KB Output is correct
29 Correct 697 ms 65620 KB Output is correct