Submission #560019

#	Time	Username	Problem	Language	Result	Execution time	Memory
560019		Yazan_Alattar	Autobahn (COI21_autobahn)	C++14	50 / 100	1 ms	468 KiB

autobahn

#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 = 1000007;
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;

ll n, k, x, l[M], t[M], r[M], cnt[M], cost[M], tot[M], ans;
bool vist[M];

void add(int v){
    vist[v] = 1;
    vist[v + x - 1] = 1;
    return;
}

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];
        ++cnt[l[i]];
        --cnt[r[i] + 1];

        ++tot[l[i] + t[i]];
        --tot[r[i] + 1];

        for(int j = 0; j <= 3; ++j){
            add(l[i] + j);
            add(l[i] + t[i] + k);
            add(r[i] + j);
            add(r[i] + 1 + j);
        }
    }
    for(int i = 1; i <= 1000; ++i) cnt[i] += cnt[i - 1], tot[i] += tot[i - 1];

    for(int i = 1; i <= 1000; ++i){
        cost[i] += cost[i - 1];
        if(cnt[i] >= k) cost[i] += tot[i];
    }

    for(int i = 1; i + x - 1 <= 1000; ++i) if(vist[i]) ans = max(ans, cost[i + x - 1] - cost[i - 1]);
    cout << ans << endl;
    return 0;
}

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