Submission #735224

#	Time	Username	Problem	Language	Result	Execution time	Memory
735224		Abito	Autobahn (COI21_autobahn)	C++14	50 / 100	4 ms	468 KiB

autobahn

#include <bits/stdc++.h>
#define endl '\n'
using namespace std;
const int N=1e5+5;
int a[N],l[N],r[N],t[N],p[N],n,k,x,ans;
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    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++) a[j]++;
    }
    for (int i=1;i<=1000;i++){
        if (a[i]<k) continue;
        for (int j=1;j<=n;j++){
            if (i<l[j] || i>r[j]) continue;
            if (l[j]+t[j]-1>=i) continue;
            p[i]++;
        }
    }
    for (int i=1;i<=1000;i++)p[i]+=p[i-1];
    for (int i=1;i+x-1<=1000;i++) ans=max(ans,p[i+x-1]-p[i-1]);
    cout<<ans<<endl;
    return 0;
}

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