oj.uz

Submission #543813

# Submission time Handle Problem Language Result Execution time Memory
543813 2022-03-31T12:26:31 Z robertbarbu27 Autobahn (COI21_autobahn) C++14
100 / 100
 188 ms 10976 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ll long long
using namespace std;
ifstream f("teroristi2.in");
ofstream g("teroristi2.out");
int N,K,X;
struct event
{
   int x;
   int tip;
};
event v[400005];
int cnt=0;
bool cmp(event a,event b)
{
    if(a.x==b.x)
    {
        return a.tip<b.tip;
    }
    return a.x<b.x;
}
long long sp[400005];
long long get_sum(int x)
{
    if(x==-1) return 0;
    return sp[x];
}
int main ()
{
    cin>>N>>K>>X;
    for(int i=1;i<=N;i++)
    {
        int l,t,r;
        cin>>l>>t>>r;
        v[++cnt]={l,2};
        v[++cnt]={r+1,-2};
        if(l+t<=r)
        {
            v[++cnt]={l+t,1};
            v[++cnt]={r+1,-1};
        }

    }
    sort(v+1,v+cnt+1,cmp);
    int nrclienti=0;
    int nrpeople=0,overcharged=0;
    vector<pair<int,int> > segments;
     segments.push_back({-1e9,0});
    for(int i=1;i<=cnt;i++)
    {
        if(v[i].tip==2)
        {
            nrpeople++;

        }
        if(v[i].tip==-2)
        {
            nrpeople--;
        }
        if(v[i].tip==1)
        {
            overcharged++;
        }
        if(v[i].tip==-1)
        {
            overcharged--;
        }
        if(v[i].x!=v[i+1].x)
        {
           // if(v[i].x==6) cout<<overcharged<<" ";
            if(nrpeople>=K)
            {
                segments.push_back({v[i].x,overcharged});
            }
            else segments.push_back({v[i].x,0});
            //if(v[i].)
        }
    }
    segments.push_back({2e9,0});
    long long ans=0;
    for(int i=0;i<segments.size()-1;i++)
    {
        long long x=1LL*(segments[i+1].first-segments[i].first)*1LL*segments[i].second;
        if(i==0) sp[i]=x;
        else sp[i]=sp[i-1]+x;
    }
    for(int i=1;i<segments.size()-2;i++)
    {
       // cout<<segments[i].first<<" "<<segments[i].second<<'\n';
        int st=i,dr=segments.size()-1,rasp;
        while(st<=dr)
        {
            int mij=(st+dr)/2;
            if(segments[mij].first-segments[i].first>=X)
            {
                rasp=mij;
                dr=mij-1;
            }
            else st=mij+1;
        }
        rasp--;
        long long rez=get_sum(rasp-1)-get_sum(i-1);
        int cate=segments[rasp].first-segments[i].first;///how many we already have
        rez=rez+1LL*(X-cate)*1LL*segments[rasp].second;
        ans=max(ans,rez);

    }
    //cout<<ans;
    ///check the end
    for(int i=segments.size()-2;i>=1;i--)
    {
        int finish=segments[i+1].first-1,rasp;
        if(segments[i].first>=X)
        {
            int st=0,dr=i;
            while(st<=dr)
            {
                int mij=(st+dr)/2;
                if(finish-segments[mij].first+1>=X)
                {
                    rasp=mij;
                    st=mij+1;
                }
                else dr=mij-1;
            }
        }
        ll rez=get_sum(i)-get_sum(rasp);
        int cate=finish-segments[rasp+1].first+1;
        rez+=1LL*(X-cate)*1LL*segments[rasp].second;
        ans=max(ans,rez);
    }
    cout<<ans;
   // cout<<ans<<" ";






}

Compilation message

autobahn.cpp: In function 'int main()':
autobahn.cpp:82:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     for(int i=0;i<segments.size()-1;i++)
      |                 ~^~~~~~~~~~~~~~~~~~
autobahn.cpp:88:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for(int i=1;i<segments.size()-2;i++)
      |                 ~^~~~~~~~~~~~~~~~~~
autobahn.cpp:46:9: warning: unused variable 'nrclienti' [-Wunused-variable]
   46 |     int nrclienti=0;
      |         ^~~~~~~~~
autobahn.cpp:129:38: warning: 'rasp' may be used uninitialized in this function [-Wmaybe-uninitialized]
  129 |         int cate=finish-segments[rasp+1].first+1;
      |                                  ~~~~^~
autobahn.cpp:103:30: warning: 'rasp' may be used uninitialized in this function [-Wmaybe-uninitialized]
  103 |         long long rez=get_sum(rasp-1)-get_sum(i-1);
      |                       ~~~~~~~^~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 360 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 360 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 2 ms 340 KB Output is correct
20 Correct 2 ms 340 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 360 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 2 ms 340 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 177 ms 8280 KB Output is correct
22 Correct 179 ms 10916 KB Output is correct
23 Correct 173 ms 10944 KB Output is correct
24 Correct 171 ms 10940 KB Output is correct
25 Correct 168 ms 10868 KB Output is correct
26 Correct 188 ms 10884 KB Output is correct
27 Correct 161 ms 10976 KB Output is correct
28 Correct 157 ms 10896 KB Output is correct
29 Correct 162 ms 10864 KB Output is correct