oj.uz

Submission #709711

# Submission time Handle Problem Language Result Execution time Memory
709711 2023-03-14T08:31:55 Z Antekb Monochrome Points (JOI20_monochrome) C++17
35 / 100
 2000 ms 9300 KB 
#include<bits/stdc++.h>

#define st first
#define nd second
#define eb emplace_back
#define pb push_back
#define mp make_pair
#define pp pop_back
#define all(x) x.begin(), x.end()

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

void debug(){cerr<<"\n";}
template<typename H, typename... T>
void debug(H h, T... t){cerr<<h;if(sizeof...(t))cerr<<", ";debug(t...);};
#define deb(x...) cerr<<#x<<" = ";debug(x);

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

const int N=1<<19, INF=1e9+5;
int tab[N+N];
void add(int v, int c){
	for(v+=N; v; v>>=1)tab[v]+=c;
}
int sum(int l, int r){
	int ans=0;
	for(l+=N,r+=N; l<r; l>>=1, r>>=1){
		if(l&1)ans+=tab[l++];
		if(r&1)ans+=tab[--r];
	}
	return ans;
}
ll solve(int n, vi A, vi B, int a){
	int wsk=n, wsk2=n;
	vector<pii> V(n);
	for(int i=0; i<a; i++){
		//deb(wsk, wsk2);
		V[i]=mp(A[i], B[n-a+i]);
	}
	for(int i=a; i<n; i++){
		V[i]=mp(A[i], B[i-a]);
	}
	for(pii &i:V)if(i.st>i.nd)swap(i.st, i.nd);
	sort(all(V));
	int ans=0;
	for(int i=0; i<n; i++){
		//deb(V[i]);
		//deb(V[i].st, V[i].nd);
		ans+=sum(V[i].st, V[i].nd);
		add(V[i].nd, 1);
	}
	for(int i=0; i<n; i++){
		add(V[i].nd, -1);
	}
	//deb(ans);
	return ans;
}
int main(){
	//ios_base::sync_with_stdio(0);cin.tie(0);
	int n;
	cin>>n;
	string s;
	cin>>s;
	vi A, B;
	for(int i=0; i<n+n; i++){
		if(s[i]=='B')A.pb(i);
		else B.pb(i);
	}
	ll ans=0;
	for(int i=0; i<n; i++){
		ans=max(ans, solve(n, A, B, i));
	}
	cout<<ans;
}

Compilation message

monochrome.cpp: In function 'll solve(int, vi, vi, int)':
monochrome.cpp:38:6: warning: unused variable 'wsk' [-Wunused-variable]
   38 |  int wsk=n, wsk2=n;
      |      ^~~
monochrome.cpp:38:13: warning: unused variable 'wsk2' [-Wunused-variable]
   38 |  int wsk=n, wsk2=n;
      |             ^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 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 312 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
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 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 312 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
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 10 ms 340 KB Output is correct
15 Correct 11 ms 372 KB Output is correct
16 Correct 11 ms 340 KB Output is correct
17 Correct 10 ms 340 KB Output is correct
18 Correct 7 ms 340 KB Output is correct
19 Correct 8 ms 340 KB Output is correct
20 Correct 10 ms 468 KB Output is correct
21 Correct 8 ms 364 KB Output is correct
22 Correct 8 ms 372 KB Output is correct
23 Correct 5 ms 316 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 9 ms 312 KB Output is correct
28 Correct 9 ms 340 KB Output is correct
29 Correct 7 ms 312 KB Output is correct
30 Correct 7 ms 340 KB Output is correct
31 Correct 9 ms 340 KB Output is correct
32 Correct 10 ms 312 KB Output is correct
33 Correct 10 ms 340 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 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 312 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
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 10 ms 340 KB Output is correct
15 Correct 11 ms 372 KB Output is correct
16 Correct 11 ms 340 KB Output is correct
17 Correct 10 ms 340 KB Output is correct
18 Correct 7 ms 340 KB Output is correct
19 Correct 8 ms 340 KB Output is correct
20 Correct 10 ms 468 KB Output is correct
21 Correct 8 ms 364 KB Output is correct
22 Correct 8 ms 372 KB Output is correct
23 Correct 5 ms 316 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 9 ms 312 KB Output is correct
28 Correct 9 ms 340 KB Output is correct
29 Correct 7 ms 312 KB Output is correct
30 Correct 7 ms 340 KB Output is correct
31 Correct 9 ms 340 KB Output is correct
32 Correct 10 ms 312 KB Output is correct
33 Correct 10 ms 340 KB Output is correct
34 Correct 526 ms 432 KB Output is correct
35 Correct 512 ms 436 KB Output is correct
36 Correct 489 ms 428 KB Output is correct
37 Correct 454 ms 424 KB Output is correct
38 Correct 353 ms 340 KB Output is correct
39 Correct 410 ms 420 KB Output is correct
40 Correct 377 ms 416 KB Output is correct
41 Correct 369 ms 416 KB Output is correct
42 Correct 498 ms 428 KB Output is correct
43 Correct 435 ms 464 KB Output is correct
44 Correct 402 ms 468 KB Output is correct
45 Correct 391 ms 428 KB Output is correct
46 Correct 417 ms 436 KB Output is correct
47 Correct 466 ms 428 KB Output is correct
48 Correct 447 ms 428 KB Output is correct
49 Correct 359 ms 420 KB Output is correct
50 Correct 376 ms 440 KB Output is correct
51 Correct 432 ms 420 KB Output is correct
52 Correct 420 ms 432 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 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 312 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
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 10 ms 340 KB Output is correct
15 Correct 11 ms 372 KB Output is correct
16 Correct 11 ms 340 KB Output is correct
17 Correct 10 ms 340 KB Output is correct
18 Correct 7 ms 340 KB Output is correct
19 Correct 8 ms 340 KB Output is correct
20 Correct 10 ms 468 KB Output is correct
21 Correct 8 ms 364 KB Output is correct
22 Correct 8 ms 372 KB Output is correct
23 Correct 5 ms 316 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 9 ms 312 KB Output is correct
28 Correct 9 ms 340 KB Output is correct
29 Correct 7 ms 312 KB Output is correct
30 Correct 7 ms 340 KB Output is correct
31 Correct 9 ms 340 KB Output is correct
32 Correct 10 ms 312 KB Output is correct
33 Correct 10 ms 340 KB Output is correct
34 Correct 526 ms 432 KB Output is correct
35 Correct 512 ms 436 KB Output is correct
36 Correct 489 ms 428 KB Output is correct
37 Correct 454 ms 424 KB Output is correct
38 Correct 353 ms 340 KB Output is correct
39 Correct 410 ms 420 KB Output is correct
40 Correct 377 ms 416 KB Output is correct
41 Correct 369 ms 416 KB Output is correct
42 Correct 498 ms 428 KB Output is correct
43 Correct 435 ms 464 KB Output is correct
44 Correct 402 ms 468 KB Output is correct
45 Correct 391 ms 428 KB Output is correct
46 Correct 417 ms 436 KB Output is correct
47 Correct 466 ms 428 KB Output is correct
48 Correct 447 ms 428 KB Output is correct
49 Correct 359 ms 420 KB Output is correct
50 Correct 376 ms 440 KB Output is correct
51 Correct 432 ms 420 KB Output is correct
52 Correct 420 ms 432 KB Output is correct
53 Execution timed out 2061 ms 9300 KB Time limit exceeded
54 Halted 0 ms 0 KB -