oj.uz

Submission #462023

# Submission time Handle Problem Language Result Execution time Memory
462023 2021-08-10T07:10:59 Z Jasiekstrz Autobahn (COI21_autobahn) C++17
100 / 100
 89 ms 6604 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
const int N=1e5;
vector<pair<int,int>> ev;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n,k,x;
	cin>>n>>k>>x;
	for(int i=1;i<=n;i++)
	{
		int l,r,t;
		cin>>l>>t>>r;
		if(l+t<=r)
		{
			ev.emplace_back(l+t,0);
			ev.emplace_back(r+1,1);
		}
		ev.emplace_back(l,2);
		ev.emplace_back(r+1,3);
	}
	sort(ev.begin(),ev.end());
	int l=-x,r=0;
	int cntl=0,cntr=0;
	int opl=0,opr=0;
	long long ans=0,tmp=0;
	for(int i=0,j=0;i<ev.size();)
	{
		if(j>=ev.size() || ev[i].fi-l<ev[j].fi-r)
		{
			long long d=ev[i].fi-l;
			if(opr>=k)
				tmp+=d*cntr;
			if(opl>=k)
				tmp-=d*cntl;
			l+=d;
			r+=d;
			if(ev[i].se==0)
				cntl++;
			else if(ev[i].se==1)
				cntl--;
			else if(ev[i].se==2)
				opl++;
			else
				opl--;
			i++;
		}
		else
		{
			long long d=ev[j].fi-r;
			if(opr>=k)
				tmp+=d*cntr;
			if(opl>=k)
				tmp-=d*cntl;
			l+=d;
			r+=d;
			if(ev[j].se==0)
				cntr++;
			else if(ev[j].se==1)
				cntr--;
			else if(ev[j].se==2)
				opr++;
			else
				opr--;
			j++;
		}
		//cerr<<l<<" "<<r<<" "<<tmp<<"\n";
		ans=max(ans,tmp);
	}
	cout<<ans<<"\n";
	return 0;
}

Compilation message

autobahn.cpp: In function 'int main()':
autobahn.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  for(int i=0,j=0;i<ev.size();)
      |                  ~^~~~~~~~~~
autobahn.cpp:33:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   if(j>=ev.size() || ev[i].fi-l<ev[j].fi-r)
      |      ~^~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 88 ms 6548 KB Output is correct
22 Correct 87 ms 6508 KB Output is correct
23 Correct 89 ms 6584 KB Output is correct
24 Correct 85 ms 6604 KB Output is correct
25 Correct 86 ms 6560 KB Output is correct
26 Correct 87 ms 6588 KB Output is correct
27 Correct 84 ms 6516 KB Output is correct
28 Correct 84 ms 6596 KB Output is correct
29 Correct 86 ms 6460 KB Output is correct