Submission #1002651

#	Time	Username	Problem	Language	Result	Execution time	Memory
1002651		Cabralbonzao	Autobahn (COI21_autobahn)	C++17	50 / 100	106 ms	13272 KiB

autobahn

#include<bits/stdc++.h>
using namespace std;

#define N 2010
#define pb push_back

typedef long long ll;
typedef pair<ll,ll> pll;

vector<pll>range;
ll sum[N];

void SOMA(ll l,ll r,ll x)
{
    ll i;
    for(i=l;i<=r;i++)
    {
        sum[i]+=x;
    }
    return;
}

int main()
{
    ll n,k,x,i=0,l,t,r,pos,val,cur=0,s=0,ans=0;

    cin >> n >> k >> x;
    while(i<n)
    {
        cin >> l >> t >> r;
        range.pb({l,1});
        range.pb({r+1,-1});
        range.pb({l+t,2});
        range.pb({r+1,-2});
        i++;
    }
    sort(range.begin(),range.end());
    i=0;
    n*=4;
    range.pb({-1,0});
    while(i<n)
    {
        pos=range[i].first;
        while(range[i].first==pos)
        {
            val=range[i].second;
            if(val==1)
                cur++;
            if(val==-1)
                cur--;
            if(val==2)
                s++;
            if(val==-2)
                s--;
            i++;
        }
        if(cur>=k)
        {
            SOMA(pos,range[i].first-1,s);
        }
    }
    for(i=1;i<N;i++)
    {
        sum[i]+=sum[i-1];
        if(i>=x)
            ans=max(ans,sum[i]-sum[i-x]);
    }
    cout << ans << endl;

    return 0;
}

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