Submission #420383

#	Time	Username	Problem	Language	Result	Execution time	Memory
420383		JvThunder	Autobahn (COI21_autobahn)	C++14	50 / 100	175 ms	5728 KiB

autobahn

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define fir first
#define sec second
typedef long long ll;

using namespace std;

int n,k,x;
int add[1005] = {0};
vector<pair<int,pair<int,int>>> v;
void solve()
{
    cin >> n >> k >> x;
    for(int i=0;i<n;i++)
    {
        int l,t,r;
        cin >> l >> t >> r;
        v.pb({l,{t,r}});
    }

    for(int i=1;i<=1000;i++)
    {
        int extracnt = 0;
        int cnt = 0;
        for(int j=0;j<n;j++)
        {
            if(v[j].fir<=i && i<=v[j].sec.sec) 
            {
                cnt++;
                if(v[j].fir+v[j].sec.fir<=i) extracnt++;
            }
        }
        if(cnt>=k) add[i] = extracnt;
    }

    int sum = 0; int mxsum = 0;
    for(int i=1;i<=x;i++) sum += add[i], mxsum = max(mxsum,sum);
    for(int i=x+1;i<=1000;i++) sum -= add[i-x], sum += add[i], mxsum = max(mxsum,sum);;
    cout << mxsum << endl;
	return;
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int tc=1;
	//cin>>tc;
	for(int i=1;i<=tc;i++) solve();
 	return 0;
}

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