oj.uz

Submission #423586

# Submission time Handle Problem Language Result Execution time Memory
423586 2021-06-11T09:56:07 Z JvThunder Autobahn (COI21_autobahn) C++14
100 / 100
 868 ms 57120 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-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:39:21: 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]
   39 |         if(pq.size()>=k) val.pb({{prv,x-1},cnt});
      |            ~~~~~~~~~^~~
autobahn.cpp:59:22: 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]
   59 |     for(int ptr=0;ptr<val.size();ptr++)
      |                   ~~~^~~~~~~~~~~
autobahn.cpp:61:21: 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]
   61 |         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 204 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 1 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 204 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 1 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 2 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 3 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 204 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 1 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 2 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 3 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 868 ms 56932 KB Output is correct
22 Correct 856 ms 56752 KB Output is correct
23 Correct 801 ms 57120 KB Output is correct
24 Correct 709 ms 52200 KB Output is correct
25 Correct 797 ms 53352 KB Output is correct
26 Correct 776 ms 51848 KB Output is correct
27 Correct 629 ms 48224 KB Output is correct
28 Correct 686 ms 48964 KB Output is correct
29 Correct 725 ms 49764 KB Output is correct