Submission #920329

#	Time	Username	Problem	Language	Result	Execution time	Memory
920329		zeta7532	Autobahn (COI21_autobahn)	C++17	50 / 100	3 ms	5212 KiB

autobahn

#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
const ll mod = 998244353;
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define faster ios::sync_with_stdio(false);cin.tie(nullptr)

int main() {
    ll N,K,X;
    cin >> N >> K >> X;
    vector<ll> l(N),t(N),r(N);
    vector<ll> A(1050,0);
    vector<ll> B(1050,0);
    rep(i,N){
        cin >> l[i] >> t[i] >> r[i];
        A[l[i]]++;
        A[r[i]+1]--;
        if(l[i]+t[i]<=r[i]){
            B[l[i]+t[i]]++;
            B[r[i]+1]--;
        }
    }
    rep(i,1050-1) A[i+1]+=A[i],B[i+1]+=B[i];
    ll ans=0;
    rep(i,1050-X+1){
        ll cnt=0;
        for(ll j=i;j<i+X;j++){
            if(A[j]>=K) cnt+=B[j];
        }
        ans=max(ans,cnt);
    }
    cout << ans << endl;
    return 0;
}

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