#include <bits/stdc++.h>
#define FOR(i,p,k) for(int i=(p);i<=(k);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define ssize(x) (int(x.size()))
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
using namespace std;
typedef pair<int, int> pii;
struct przedzialowiec{
int N;
vector<int> t;
przedzialowiec(int n){
for(N = 1; N <= n;) N <<= 1;
t.resize(N<<1, 0);
}
void dodaj(int poz){
for(poz+=N; poz; poz>>=1) ++t[poz];
}
int suma(int p, int k){
int ret = 0;
for(p+=N, k+=N+1; p<k; p>>=1, k>>=1){
if(p&1) ret += t[p++];
if(k&1) ret += t[--k];
}
return ret;
}
};
int main(){
int n;
scanf("%d\n", &n);
int n2 = n<<1;
vector<int> s(n2);
REP(i, n2){
char c;
scanf("%c", &c);
s[i] = c=='B';
}
int wyn = 0;
REP(xd, n){
vector<pii> prz;
vector<vector<int>> lewo(2), prawo(2);
REP(i, n) lewo[s[i]].emplace_back(i);
FOR(i, n, n2-1) prawo[s[i]].emplace_back(i);
REP(i, ssize(lewo[0])) prz.emplace_back(lewo[0][i], prawo[1][i]);
REP(i, ssize(lewo[1])) prz.emplace_back(lewo[1][i], prawo[0][i]);
int tmp = 0;
sort(all(prz));
przedzialowiec przed(n);
REP(i, n){
pii t = prz[i];
tmp += przed.suma(0, t.se-n);
przed.dodaj(t.se-n);
}
wyn = max(wyn, tmp);
s.insert(s.begin(), s.back());
s.pop_back();
}
printf("%d", wyn);
return 0;
}
Compilation message
monochrome.cpp: In function 'int main()':
monochrome.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | scanf("%d\n", &n);
| ~~~~~^~~~~~~~~~~~
monochrome.cpp:38:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
38 | scanf("%c", &c);
| ~~~~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 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 |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 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 |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
600 KB |
Output is correct |
| 15 |
Correct |
7 ms |
344 KB |
Output is correct |
| 16 |
Correct |
7 ms |
452 KB |
Output is correct |
| 17 |
Correct |
7 ms |
344 KB |
Output is correct |
| 18 |
Correct |
3 ms |
344 KB |
Output is correct |
| 19 |
Correct |
5 ms |
344 KB |
Output is correct |
| 20 |
Correct |
4 ms |
344 KB |
Output is correct |
| 21 |
Correct |
4 ms |
348 KB |
Output is correct |
| 22 |
Correct |
5 ms |
344 KB |
Output is correct |
| 23 |
Correct |
3 ms |
344 KB |
Output is correct |
| 24 |
Correct |
4 ms |
348 KB |
Output is correct |
| 25 |
Correct |
4 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
348 KB |
Output is correct |
| 27 |
Correct |
4 ms |
344 KB |
Output is correct |
| 28 |
Correct |
5 ms |
348 KB |
Output is correct |
| 29 |
Correct |
3 ms |
344 KB |
Output is correct |
| 30 |
Correct |
3 ms |
344 KB |
Output is correct |
| 31 |
Correct |
4 ms |
344 KB |
Output is correct |
| 32 |
Correct |
4 ms |
344 KB |
Output is correct |
| 33 |
Correct |
4 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 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 |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
600 KB |
Output is correct |
| 15 |
Correct |
7 ms |
344 KB |
Output is correct |
| 16 |
Correct |
7 ms |
452 KB |
Output is correct |
| 17 |
Correct |
7 ms |
344 KB |
Output is correct |
| 18 |
Correct |
3 ms |
344 KB |
Output is correct |
| 19 |
Correct |
5 ms |
344 KB |
Output is correct |
| 20 |
Correct |
4 ms |
344 KB |
Output is correct |
| 21 |
Correct |
4 ms |
348 KB |
Output is correct |
| 22 |
Correct |
5 ms |
344 KB |
Output is correct |
| 23 |
Correct |
3 ms |
344 KB |
Output is correct |
| 24 |
Correct |
4 ms |
348 KB |
Output is correct |
| 25 |
Correct |
4 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
348 KB |
Output is correct |
| 27 |
Correct |
4 ms |
344 KB |
Output is correct |
| 28 |
Correct |
5 ms |
348 KB |
Output is correct |
| 29 |
Correct |
3 ms |
344 KB |
Output is correct |
| 30 |
Correct |
3 ms |
344 KB |
Output is correct |
| 31 |
Correct |
4 ms |
344 KB |
Output is correct |
| 32 |
Correct |
4 ms |
344 KB |
Output is correct |
| 33 |
Correct |
4 ms |
348 KB |
Output is correct |
| 34 |
Correct |
357 ms |
596 KB |
Output is correct |
| 35 |
Correct |
354 ms |
532 KB |
Output is correct |
| 36 |
Correct |
347 ms |
344 KB |
Output is correct |
| 37 |
Correct |
315 ms |
592 KB |
Output is correct |
| 38 |
Correct |
262 ms |
516 KB |
Output is correct |
| 39 |
Correct |
286 ms |
512 KB |
Output is correct |
| 40 |
Correct |
257 ms |
344 KB |
Output is correct |
| 41 |
Correct |
230 ms |
516 KB |
Output is correct |
| 42 |
Correct |
349 ms |
516 KB |
Output is correct |
| 43 |
Correct |
302 ms |
344 KB |
Output is correct |
| 44 |
Correct |
313 ms |
512 KB |
Output is correct |
| 45 |
Correct |
298 ms |
344 KB |
Output is correct |
| 46 |
Correct |
324 ms |
536 KB |
Output is correct |
| 47 |
Correct |
294 ms |
536 KB |
Output is correct |
| 48 |
Correct |
305 ms |
344 KB |
Output is correct |
| 49 |
Correct |
258 ms |
344 KB |
Output is correct |
| 50 |
Correct |
276 ms |
512 KB |
Output is correct |
| 51 |
Correct |
305 ms |
344 KB |
Output is correct |
| 52 |
Correct |
362 ms |
596 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 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 |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
600 KB |
Output is correct |
| 15 |
Correct |
7 ms |
344 KB |
Output is correct |
| 16 |
Correct |
7 ms |
452 KB |
Output is correct |
| 17 |
Correct |
7 ms |
344 KB |
Output is correct |
| 18 |
Correct |
3 ms |
344 KB |
Output is correct |
| 19 |
Correct |
5 ms |
344 KB |
Output is correct |
| 20 |
Correct |
4 ms |
344 KB |
Output is correct |
| 21 |
Correct |
4 ms |
348 KB |
Output is correct |
| 22 |
Correct |
5 ms |
344 KB |
Output is correct |
| 23 |
Correct |
3 ms |
344 KB |
Output is correct |
| 24 |
Correct |
4 ms |
348 KB |
Output is correct |
| 25 |
Correct |
4 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
348 KB |
Output is correct |
| 27 |
Correct |
4 ms |
344 KB |
Output is correct |
| 28 |
Correct |
5 ms |
348 KB |
Output is correct |
| 29 |
Correct |
3 ms |
344 KB |
Output is correct |
| 30 |
Correct |
3 ms |
344 KB |
Output is correct |
| 31 |
Correct |
4 ms |
344 KB |
Output is correct |
| 32 |
Correct |
4 ms |
344 KB |
Output is correct |
| 33 |
Correct |
4 ms |
348 KB |
Output is correct |
| 34 |
Correct |
357 ms |
596 KB |
Output is correct |
| 35 |
Correct |
354 ms |
532 KB |
Output is correct |
| 36 |
Correct |
347 ms |
344 KB |
Output is correct |
| 37 |
Correct |
315 ms |
592 KB |
Output is correct |
| 38 |
Correct |
262 ms |
516 KB |
Output is correct |
| 39 |
Correct |
286 ms |
512 KB |
Output is correct |
| 40 |
Correct |
257 ms |
344 KB |
Output is correct |
| 41 |
Correct |
230 ms |
516 KB |
Output is correct |
| 42 |
Correct |
349 ms |
516 KB |
Output is correct |
| 43 |
Correct |
302 ms |
344 KB |
Output is correct |
| 44 |
Correct |
313 ms |
512 KB |
Output is correct |
| 45 |
Correct |
298 ms |
344 KB |
Output is correct |
| 46 |
Correct |
324 ms |
536 KB |
Output is correct |
| 47 |
Correct |
294 ms |
536 KB |
Output is correct |
| 48 |
Correct |
305 ms |
344 KB |
Output is correct |
| 49 |
Correct |
258 ms |
344 KB |
Output is correct |
| 50 |
Correct |
276 ms |
512 KB |
Output is correct |
| 51 |
Correct |
305 ms |
344 KB |
Output is correct |
| 52 |
Correct |
362 ms |
596 KB |
Output is correct |
| 53 |
Execution timed out |
2029 ms |
10440 KB |
Time limit exceeded |
| 54 |
Halted |
0 ms |
0 KB |
- |
