oj.uz

Submission #1003923

# Submission time Handle Problem Language Result Execution time Memory
1003923 2024-06-20T20:08:04 Z vjudge1 Ekoeko (COCI21_ekoeko) C++17
110 / 110
 29 ms 8392 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
const int maxn = 2e5+5;

int bit[maxn];

void upd(int x){
	for(; x<maxn; x+=x&-x) bit[x]++;
}

int query(int x){
	int rt=0;
	for(; x>0; x-=x&-x) rt+=bit[x];
	return rt;
}

int ord(char c){
	return (int)(c-'a');
}

signed main(){
	int n; cin >> n;
	string s; cin >> s;
	vector<int> mp(26,0), cnt(26,0);
	for(char c : s) cnt[ord(c)]++;

	int cnt1=0, cnt2=0;
	vector<int> arr1, arr2;
	vector<int> trans(2*n,0);
	// cout << endl;
	set<int> pos[26];
	for(int i=0; i<2*n; i++){
		int p = ord(s[i]);

		if(mp[p]<cnt[p]/2){
			mp[p]++;
			cnt1++;
			trans[i]=cnt1;
			pos[p].insert(cnt1);
		}
	}
	for(int i=0; i<2*n; i++) if(!trans[i]){
		int p = ord(s[i]);
		assert(pos[p].size()>0);
		trans[i] = (*pos[p].begin())+n;
		pos[p].erase(pos[p].begin());
	}

	// for(int x : trans) cout << x << " ";
	// cout << endl;

	int ans=0;
	for(int i=0; i<2*n; i++	){
		ans += i-query(trans[i]-1);
		upd(trans[i]);
	}
	cout << ans << '\n';
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:29:14: warning: unused variable 'cnt2' [-Wunused-variable]
   29 |  int cnt1=0, cnt2=0;
      |              ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 7 ms 2908 KB Output is correct
3 Correct 13 ms 5612 KB Output is correct
4 Correct 20 ms 8392 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 7 ms 2908 KB Output is correct
3 Correct 13 ms 5612 KB Output is correct
4 Correct 20 ms 8392 KB Output is correct
5 Correct 0 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

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 7 ms 2908 KB Output is correct
3 Correct 13 ms 5612 KB Output is correct
4 Correct 20 ms 8392 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 23 ms 8364 KB Output is correct
7 Correct 25 ms 8168 KB Output is correct
8 Correct 26 ms 8164 KB Output is correct
9 Correct 24 ms 8168 KB Output is correct
10 Correct 22 ms 7916 KB Output is correct
11 Correct 23 ms 7872 KB Output is correct
12 Correct 25 ms 7916 KB Output is correct
13 Correct 27 ms 7796 KB Output is correct
14 Correct 25 ms 7648 KB Output is correct
15 Correct 25 ms 7660 KB Output is correct

Subtask #4
20.0 / 20.0

# 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 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

Subtask #5
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 7 ms 2908 KB Output is correct
3 Correct 13 ms 5612 KB Output is correct
4 Correct 20 ms 8392 KB Output is correct
5 Correct 0 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 23 ms 8364 KB Output is correct
11 Correct 25 ms 8168 KB Output is correct
12 Correct 26 ms 8164 KB Output is correct
13 Correct 24 ms 8168 KB Output is correct
14 Correct 22 ms 7916 KB Output is correct
15 Correct 23 ms 7872 KB Output is correct
16 Correct 25 ms 7916 KB Output is correct
17 Correct 27 ms 7796 KB Output is correct
18 Correct 25 ms 7648 KB Output is correct
19 Correct 25 ms 7660 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 29 ms 8192 KB Output is correct
33 Correct 24 ms 8184 KB Output is correct
34 Correct 21 ms 8168 KB Output is correct
35 Correct 21 ms 8216 KB Output is correct
36 Correct 23 ms 8052 KB Output is correct
37 Correct 23 ms 7876 KB Output is correct
38 Correct 25 ms 7804 KB Output is correct
39 Correct 23 ms 7916 KB Output is correct
40 Correct 25 ms 7660 KB Output is correct
41 Correct 23 ms 7708 KB Output is correct