oj.uz

Submission #997008

# Submission time Handle Problem Language Result Execution time Memory
997008 2024-06-11T15:05:49 Z cadmiumsky Monochrome Points (JOI20_monochrome) C++17
100 / 100
 1243 ms 17296 KB 
// problema stupida
// ok dupa asta promit ca ma gandesc serios la problema
#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
using namespace std;

using ll = long long;
using ld = long double;

#define int ll
#define sz(x) ((int)(x).size())

using pii = pair<int,int>;
using tii = tuple<int,int,int>;

const int nmax = 2e5 + 5;

#define lsb(x) (x & -x)
struct AIB {
   vector<int> tree;
   void init(int n) { tree.assign(n + 5, 0); }
   void upd(int p, int x) {
      while(p < sz(tree)) tree[p] += x, p += lsb(p);
   }
   int query(int p) {
      int sum = 0;
      while(p > 0) sum += tree[p], p -= lsb(p);
      return sum;
   }
};



int n;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); // trebuia sa o incerc
ll init(string s, int a = rng() % (2 * n + 1)) {
   vector<pii> segm;
   vector<int> b, w;
   for(int i = 0; i < sz(s); i++)
      (s[i] == 'B'? b : w).emplace_back(i + 1);
   
   for(int i = 0; i < sz(b); i++)
      segm.emplace_back(b[i], w[(i + a) % sz(w)]);
   for(auto &[l, r] : segm) {
      if(l > r) swap(l, r);
   }
   
   sort(all(segm));
   ll sum = 0;
   AIB aib;
   aib.init(sz(s) + 5);
   for(auto [l, r] : segm) {
      sum += aib.query(r) - aib.query(l);
      aib.upd(r, 1);
   }
   return sum;
}


signed main() {
   ld S = clock();
   cin.tie(0) -> sync_with_stdio(0);
   cin >> n;
   
   string s;
   cin >> s;
   ll rez = 0;
   
   int lim = -1;
   for(int i = 20; i >= 0; i--) {
      if(init(s, lim + (1 << i)) <= init(s, lim + (1 << i) + 1)) lim += (1 << i);
   }
   
   cout << init(s, lim + 1) << '\n';
      
}

/**
      Istenem! Nu poate fi real.
-- Surse verificate
*/

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:61:7: warning: unused variable 'S' [-Wunused-variable]
   61 |    ld S = clock();
      |       ^
monochrome.cpp:67:7: warning: unused variable 'rez' [-Wunused-variable]
   67 |    ll rez = 0;
      |       ^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 432 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 432 KB Output is correct
34 Correct 7 ms 604 KB Output is correct
35 Correct 7 ms 608 KB Output is correct
36 Correct 6 ms 608 KB Output is correct
37 Correct 6 ms 604 KB Output is correct
38 Correct 4 ms 600 KB Output is correct
39 Correct 4 ms 604 KB Output is correct
40 Correct 4 ms 604 KB Output is correct
41 Correct 5 ms 604 KB Output is correct
42 Correct 8 ms 604 KB Output is correct
43 Correct 6 ms 600 KB Output is correct
44 Correct 6 ms 604 KB Output is correct
45 Correct 4 ms 604 KB Output is correct
46 Correct 4 ms 604 KB Output is correct
47 Correct 5 ms 596 KB Output is correct
48 Correct 5 ms 600 KB Output is correct
49 Correct 4 ms 596 KB Output is correct
50 Correct 3 ms 348 KB Output is correct
51 Correct 5 ms 604 KB Output is correct
52 Correct 6 ms 608 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 432 KB Output is correct
34 Correct 7 ms 604 KB Output is correct
35 Correct 7 ms 608 KB Output is correct
36 Correct 6 ms 608 KB Output is correct
37 Correct 6 ms 604 KB Output is correct
38 Correct 4 ms 600 KB Output is correct
39 Correct 4 ms 604 KB Output is correct
40 Correct 4 ms 604 KB Output is correct
41 Correct 5 ms 604 KB Output is correct
42 Correct 8 ms 604 KB Output is correct
43 Correct 6 ms 600 KB Output is correct
44 Correct 6 ms 604 KB Output is correct
45 Correct 4 ms 604 KB Output is correct
46 Correct 4 ms 604 KB Output is correct
47 Correct 5 ms 596 KB Output is correct
48 Correct 5 ms 600 KB Output is correct
49 Correct 4 ms 596 KB Output is correct
50 Correct 3 ms 348 KB Output is correct
51 Correct 5 ms 604 KB Output is correct
52 Correct 6 ms 608 KB Output is correct
53 Correct 1231 ms 17116 KB Output is correct
54 Correct 1214 ms 17052 KB Output is correct
55 Correct 1107 ms 13684 KB Output is correct
56 Correct 1139 ms 16040 KB Output is correct
57 Correct 776 ms 14140 KB Output is correct
58 Correct 976 ms 17224 KB Output is correct
59 Correct 902 ms 15672 KB Output is correct
60 Correct 913 ms 16320 KB Output is correct
61 Correct 1002 ms 16748 KB Output is correct
62 Correct 907 ms 15976 KB Output is correct
63 Correct 1068 ms 14212 KB Output is correct
64 Correct 973 ms 17296 KB Output is correct
65 Correct 1164 ms 15616 KB Output is correct
66 Correct 804 ms 15148 KB Output is correct
67 Correct 816 ms 15432 KB Output is correct
68 Correct 1026 ms 14636 KB Output is correct
69 Correct 990 ms 16824 KB Output is correct
70 Correct 920 ms 13896 KB Output is correct
71 Correct 787 ms 15584 KB Output is correct
72 Correct 1140 ms 15792 KB Output is correct
73 Correct 1243 ms 17056 KB Output is correct