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Submission #1003797

# Submission time Handle Problem Language Result Execution time Memory
1003797 2024-06-20T17:56:29 Z vjudge1 Ekoeko (COCI21_ekoeko) C++17
20 / 110
 31 ms 16224 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);
	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(i+1);
		}
	}
	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
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 6 ms 3188 KB Output is correct
3 Correct 16 ms 5868 KB Output is correct
4 Runtime error 31 ms 16224 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 6 ms 3188 KB Output is correct
3 Correct 16 ms 5868 KB Output is correct
4 Runtime error 31 ms 16224 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 6 ms 3188 KB Output is correct
3 Correct 16 ms 5868 KB Output is correct
4 Runtime error 31 ms 16224 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 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 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 344 KB Output is correct

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 6 ms 3188 KB Output is correct
3 Correct 16 ms 5868 KB Output is correct
4 Runtime error 31 ms 16224 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -