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Submission #742718

# Submission time Handle Problem Language Result Execution time Memory
742718 2023-05-16T18:53:45 Z MohamedAhmed04 Ekoeko (COCI21_ekoeko) C++14
110 / 110
 72 ms 6680 KB 
#include <bits/stdc++.h>

using namespace std ;

#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update

using namespace __gnu_pbds;

template<class T> using ordered_set = tree<T, null_type , less<T> , rb_tree_tag , tree_order_statistics_node_update> ;

const int MAX = 2e5 + 10 ;

int arr[MAX] , val[MAX] ;
int n ;

string s ;

int freq[30] , freq2[30] ;

vector<int>occ[30] ;

long long solve(string s1 , string s2)
{
	for(int i = n-1 ; i >= 0 ; --i)
		occ[s2[i]-'a'].push_back(i) ;
	for(int i = 0 ; i < n ; ++i)
		val[occ[s1[i]-'a'].back()] = i , occ[s1[i]-'a'].pop_back() ;
	ordered_set<int>s ;
	long long cnt = 0 ;
	for(int i = 0 ; i < n ; ++i)
	{
		cnt += s.size() - s.order_of_key(val[i]) ;
		s.insert(val[i]) ;
	}
	return cnt ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	cin>>s ;
	for(auto &c : s)
		freq[c-'a']++ ;
	string s1 = "" , s2 = "" ;
	long long ans = 0 , cnt = 0 ;
	for(auto &c : s)
	{
		freq2[c-'a']++ ;
		if(freq2[c-'a']*2 <= freq[c-'a'])
			s1.push_back(c) , ans += cnt ;
		else
			s2.push_back(c) , cnt++ ;
	}
	ans += solve(s1 , s2) ;
	return cout<<ans<<"\n" , 0 ;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 21 ms 2436 KB Output is correct
3 Correct 46 ms 4424 KB Output is correct
4 Correct 72 ms 6552 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 21 ms 2436 KB Output is correct
3 Correct 46 ms 4424 KB Output is correct
4 Correct 72 ms 6552 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 21 ms 2436 KB Output is correct
3 Correct 46 ms 4424 KB Output is correct
4 Correct 72 ms 6552 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 44 ms 6624 KB Output is correct
7 Correct 43 ms 6544 KB Output is correct
8 Correct 42 ms 6484 KB Output is correct
9 Correct 40 ms 6356 KB Output is correct
10 Correct 46 ms 6388 KB Output is correct
11 Correct 42 ms 6268 KB Output is correct
12 Correct 41 ms 6216 KB Output is correct
13 Correct 40 ms 6228 KB Output is correct
14 Correct 38 ms 6188 KB Output is correct
15 Correct 40 ms 6068 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #5
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 21 ms 2436 KB Output is correct
3 Correct 46 ms 4424 KB Output is correct
4 Correct 72 ms 6552 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 44 ms 6624 KB Output is correct
11 Correct 43 ms 6544 KB Output is correct
12 Correct 42 ms 6484 KB Output is correct
13 Correct 40 ms 6356 KB Output is correct
14 Correct 46 ms 6388 KB Output is correct
15 Correct 42 ms 6268 KB Output is correct
16 Correct 41 ms 6216 KB Output is correct
17 Correct 40 ms 6228 KB Output is correct
18 Correct 38 ms 6188 KB Output is correct
19 Correct 40 ms 6068 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 328 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 328 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 328 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 44 ms 6636 KB Output is correct
33 Correct 49 ms 6680 KB Output is correct
34 Correct 42 ms 6400 KB Output is correct
35 Correct 45 ms 6360 KB Output is correct
36 Correct 45 ms 6308 KB Output is correct
37 Correct 44 ms 6316 KB Output is correct
38 Correct 39 ms 6224 KB Output is correct
39 Correct 40 ms 6188 KB Output is correct
40 Correct 45 ms 6148 KB Output is correct
41 Correct 45 ms 6104 KB Output is correct