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Submission #882928

# Submission time Handle Problem Language Result Execution time Memory
882928 2023-12-04T07:34:17 Z NotLinux Palembang Bridges (APIO15_bridge) C++17
63 / 100
 2000 ms 10988 KB 
#include <bits/stdc++.h>
using namespace std;
const long long inf = 1e18 + 7;
struct ONLINE_MEDIAN{
	long long sum1 = 0 , sum2 = 0;
	int sz = 0;
	multiset < int > s1,s2;
	inline void insert(int x){
		sum2 += x;
		s2.insert(x);
		sz++;
		if(s1.size() < ((sz+1)/2)){
			sum1 += *s2.begin();
			s1.insert(*s2.begin());
			sum2 -= *s2.begin();
			s2.erase(s2.begin());
		}
		if(s2.size() and *(--s1.end()) > *(s2.begin())){
			sum2 += *(--s1.end());
			s2.insert(*(--s1.end()));
			sum1 -= *(--s1.end());
			s1.erase(--s1.end());
			sum1 += *s2.begin();
			s1.insert(*s2.begin()),
			sum2 -= *s2.begin();
			s2.erase(s2.begin());
		}
	}
	inline void erase(int x){
		if(s1.count(x)){
			sum1 -= x;
			s1.erase(s1.find(x));
		}
		else {
			sum2 -= x;
			s2.erase(s2.find(x));
		}
		sz--;
		if(s1.size() > ((sz+1)/2)){
			sum2 += *(--s1.end());
			s2.insert(*(--s1.end())),
			sum1 -= *(--s1.end());
			s1.erase(--s1.end());
		}
		if(s1.size() < ((sz+1)/2)){
			sum1 += *(s2.begin());
			s1.insert(*s2.begin());
			sum2 -= *(s2.begin());
			s2.erase(s2.begin());
		}
		if(s2.size() and *(--s1.end()) > *(s2.begin())){
			sum2 += *(--s1.end());
			s2.insert(*(--s1.end()));
			sum1 -= *(--s1.end());
			s1.erase(--s1.end());
			sum1 += *s2.begin();
			s1.insert(*s2.begin()),
			sum2 -= *s2.begin();
			s2.erase(s2.begin());
		}
	}
	inline int get_median(){
		if(s1.empty())return 0;
		return *(--s1.end());
	}
	inline long long get_ans(){
		int medi = get_median();
		return (1ll * medi * s1.size() - sum1) + (sum2 - 1ll * medi * s2.size());
	}
	inline void debug(){
		cout << "set : ";
		for(auto itr : s1)cout << itr << " ";
		cout << "|";
		for(auto itr : s2)cout << itr << " ";
	}
};
bool cmp(array < int , 3 > const& a , array < int , 3 > const& b){
	return a[0] < b[0];
}
void solve(){
	int k,n;
	long long ans0 = 0;
	cin >> k >> n;
	vector < array < int , 3 > > v2;
	for(int i = 0;i<n;i++){
		char c1,c2;
		int p1,p2;
		cin >> c1 >> p1 >> c2 >> p2;
		if(c1 == c2){
			ans0 += abs(p1 - p2);
		}
		else{
			v2.push_back({p1 + p2 , p1 , p2});
		}
	}
	sort(v2.begin() , v2.end() , cmp);
	ONLINE_MEDIAN med1 , med2;
	for(auto itr : v2){
		med2.insert(itr[1]);
		med2.insert(itr[2]);
	}
	long long ans1 = inf;
	if(k == 1){
		ans1 = med2.get_ans();
	}
	else{
		for(auto itr : v2){
			med2.erase(itr[1]);
			med2.erase(itr[2]);
			med1.insert(itr[1]);
			med1.insert(itr[2]);
			ans1 = min(ans1 , med1.get_ans() + med2.get_ans());
		}
	}
	cout << ans0 + (ans1 == inf ? 0ll : ans1) + v2.size() << '\n';
}
signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int testcase = 1;//cin >> testcase;
	while(testcase--)solve();
}

Compilation message

bridge.cpp: In member function 'void ONLINE_MEDIAN::insert(int)':
bridge.cpp:12:16: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   12 |   if(s1.size() < ((sz+1)/2)){
      |      ~~~~~~~~~~^~~~~~~~~~~~
bridge.cpp: In member function 'void ONLINE_MEDIAN::erase(int)':
bridge.cpp:39:16: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |   if(s1.size() > ((sz+1)/2)){
      |      ~~~~~~~~~~^~~~~~~~~~~~
bridge.cpp:45:16: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   45 |   if(s1.size() < ((sz+1)/2)){
      |      ~~~~~~~~~~^~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 60 ms 10952 KB Output is correct
13 Correct 99 ms 10988 KB Output is correct
14 Correct 78 ms 9908 KB Output is correct
15 Correct 48 ms 6600 KB Output is correct
16 Correct 61 ms 10848 KB Output is correct
17 Correct 60 ms 10892 KB Output is correct
18 Correct 56 ms 10980 KB Output is correct
19 Correct 70 ms 10832 KB Output is correct
20 Correct 62 ms 10948 KB Output is correct
21 Correct 62 ms 10924 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 460 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 4 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 3 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 4 ms 560 KB Output is correct
24 Correct 1 ms 348 KB Output is correct

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 4 ms 348 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 500 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 3 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 3 ms 560 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Execution timed out 2086 ms 10868 KB Time limit exceeded
26 Halted 0 ms 0 KB -