oj.uz

Submission #423587

# Submission time Handle Problem Language Result Execution time Memory
423587 2021-06-11T09:56:48 Z JvThunder Autobahn (COI21_autobahn) C++14
100 / 100
 818 ms 52452 KB 
#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,z;
multiset<pair<pair<int,int>,int>> s;
vector<pair<pair<int,int>,int>> val;
void solve()
{
    cin >> n >> k >> z;
    set<int> all;
    for(int i=0;i<n;i++)
    {
        int l,t,r;
        cin >> l >> t >> r;
        s.insert({{l,l+t-1},0});
        s.insert({{l+t,r},1});
        all.insert(l);
        all.insert(max(1,l+t-z));
        all.insert(l+t-1);
        all.insert(l+t);
        all.insert(max(1,r-z+1));
        all.insert(r);
        all.insert(r+1);
    }

    priority_queue<pair<int,int>> pq;
    int cnt = 0;
    auto itr = s.begin();
    int prv = 0;
    for(auto x:all)
    {
        if(pq.size()>=k) val.pb({{prv,x-1},cnt});
        prv = x;

        while(itr!=s.end() && (*itr).fir.fir<=x)
        {
            if((*itr).sec==1) cnt++;
            pq.push({-(*itr).fir.sec,(*itr).sec});
            itr++;
        }

        while(!pq.empty() && -pq.top().fir<x)
        {
            if(pq.top().sec==1) cnt--;
            pq.pop();
        }
    }

    ll sum = 0;
    ll mxsum = 0;
    int ptr2 = -1;
    for(int ptr=0;ptr<val.size();ptr++)
    {
        while(ptr2+1<val.size() && val[ptr2+1].fir.sec<val[ptr].fir.fir+z)
        {
            ptr2++;
            sum += (ll)val[ptr2].sec*(val[ptr2].fir.sec-val[ptr2].fir.fir+1);
        }
        mxsum = max(mxsum,sum);
        sum -= (ll)val[ptr].sec*(val[ptr].fir.sec-val[ptr].fir.fir+1);
    }
    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;
}

Compilation message

autobahn.cpp: In function 'void solve()':
autobahn.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |         if(pq.size()>=k) val.pb({{prv,x-1},cnt});
      |            ~~~~~~~~~^~~
autobahn.cpp:58:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int ptr=0;ptr<val.size();ptr++)
      |                   ~~~^~~~~~~~~~~
autobahn.cpp:60:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         while(ptr2+1<val.size() && val[ptr2+1].fir.sec<val[ptr].fir.fir+z)
      |               ~~~~~~^~~~~~~~~~~

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 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 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 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 2 ms 460 KB Output is correct
15 Correct 3 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 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 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 2 ms 460 KB Output is correct
15 Correct 3 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 790 ms 52332 KB Output is correct
22 Correct 765 ms 51992 KB Output is correct
23 Correct 818 ms 52452 KB Output is correct
24 Correct 665 ms 47496 KB Output is correct
25 Correct 700 ms 48728 KB Output is correct
26 Correct 649 ms 47180 KB Output is correct
27 Correct 560 ms 43504 KB Output is correct
28 Correct 612 ms 44248 KB Output is correct
29 Correct 606 ms 45040 KB Output is correct