Submission #1002727

#	Time	Username	Problem	Language	Result	Execution time	Memory
1002727		mariaclara	Autobahn (COI21_autobahn)	C++17	50 / 100	1 ms	600 KiB

autobahn

#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, qtd[MAXN], val[MAXN];
ll pref[MAXN];
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]--;
    }

    for(int i = 1; i <= 1000; i++) qtd[i] += qtd[i-1];

    for(int i = 1; i <= 1000; i++){
        val[i] += val[i-1];
        if(qtd[i] < k) pref[i] = pref[i-1];
        else pref[i] = pref[i-1] + val[i];
    }

    ll ans = 0;
    for(int i = 1; i <= 1000; i++)
        ans = max(ans, pref[i+x-1] - pref[i-1]);

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

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50