Submission #559894

#	Time	Username	Problem	Language	Result	Execution time	Memory
559894		Yazan_Alattar	Autobahn (COI21_autobahn)	C++14	50 / 100	2 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 = 1e18;
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], ans;

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];
        for(int j = l[i]; j <= r[i]; ++j) ++cnt[j];
    }
    for(int i = 1; i <= n; ++i)
        for(int j = l[i] + t[i]; j <= r[i]; ++j)
            if(cnt[j] >= k) ++cost[j];
    for(int i = 1; i <= 1000; ++i) cost[i] += cost[i - 1];

    for(int i = 1; i + x - 1 <= 1000; ++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