oj.uz

Submission #901271

# Submission time Handle Problem Language Result Execution time Memory
901271 2024-01-09T08:33:43 Z Keys Monochrome Points (JOI20_monochrome) C++14
100 / 100
 1726 ms 14276 KB 
#include <bits/stdc++.h>
using namespace std;
#define int int64_t
typedef vector<int> vi;
#define pb push_back
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define ROF(i, a, b) for (int i = (a); i >= (b); i--)
#define all(x) x.begin(), x.end()
#define f first
#define s second

struct ft {
    vector<int> bit; int n;
    ft(int _n) {bit.resize(_n + 5); n = _n + 5;}
    void upd(int i, int x) {i += 2; for (;i < n; i += i & (-i)) bit[i] += x;}
    int query(int i) {i += 2; int x = 0; for(; i > 0; i -= i & (-i)) x += bit[i]; return x;}
    int query(int i, int j) {if (i > j) return 0; return query(j) - query(i - 1);}
};

signed main() {
  ios::sync_with_stdio(0); cin.tie(0);
  int n; cin >> n; string s; cin >> s;
  vi b, w; FOR(i, 0, 2 * n) {
    if (s[i] == 'B') b.pb(i);
    else w.pb(i);
  }
  auto calc = [&] (vi l, vi r) {
    ft f(2 * n + 5);
    vi ord(n); iota(all(ord), 0);
    int ans = 0;
    FOR(i, 0, n) if (r[i] < l[i]) swap(r[i], l[i]);
    sort(all(ord), [&] (int u, int v) {return l[u] < l[v];});
    FOR(j, 0, n) {
      int i = ord[j];
      ans += f.query(l[i], r[i]);
      f.upd(l[i], -1); f.upd(r[i], 1);
    }
    return ans;
  };
  auto solve = [&] (int r) {
    vi tb = b;
    rotate(tb.begin(), tb.begin() + r, tb.end());
    return calc(tb, w);
  };
  int lo = 0, hi = n - 1;
  while (lo < hi) {
    int m = (lo + hi) / 2;
    if (solve(m) < solve(m + 1)) lo = m + 1;
    else hi = m;
  }
  cout << solve(lo) << endl;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 348 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 460 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 348 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 460 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 448 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 348 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 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 456 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 460 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 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 348 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 460 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 448 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 348 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 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 456 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 460 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 348 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 604 KB Output is correct
36 Correct 4 ms 600 KB Output is correct
37 Correct 3 ms 600 KB Output is correct
38 Correct 3 ms 348 KB Output is correct
39 Correct 3 ms 600 KB Output is correct
40 Correct 3 ms 348 KB Output is correct
41 Correct 4 ms 348 KB Output is correct
42 Correct 5 ms 348 KB Output is correct
43 Correct 3 ms 608 KB Output is correct
44 Correct 4 ms 356 KB Output is correct
45 Correct 3 ms 604 KB Output is correct
46 Correct 3 ms 348 KB Output is correct
47 Correct 3 ms 604 KB Output is correct
48 Correct 3 ms 464 KB Output is correct
49 Correct 2 ms 452 KB Output is correct
50 Correct 5 ms 604 KB Output is correct
51 Correct 2 ms 604 KB Output is correct
52 Correct 3 ms 348 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 0 ms 348 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 460 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 448 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 348 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 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 456 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 460 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 348 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 604 KB Output is correct
36 Correct 4 ms 600 KB Output is correct
37 Correct 3 ms 600 KB Output is correct
38 Correct 3 ms 348 KB Output is correct
39 Correct 3 ms 600 KB Output is correct
40 Correct 3 ms 348 KB Output is correct
41 Correct 4 ms 348 KB Output is correct
42 Correct 5 ms 348 KB Output is correct
43 Correct 3 ms 608 KB Output is correct
44 Correct 4 ms 356 KB Output is correct
45 Correct 3 ms 604 KB Output is correct
46 Correct 3 ms 348 KB Output is correct
47 Correct 3 ms 604 KB Output is correct
48 Correct 3 ms 464 KB Output is correct
49 Correct 2 ms 452 KB Output is correct
50 Correct 5 ms 604 KB Output is correct
51 Correct 2 ms 604 KB Output is correct
52 Correct 3 ms 348 KB Output is correct
53 Correct 1356 ms 14276 KB Output is correct
54 Correct 1438 ms 14044 KB Output is correct
55 Correct 1384 ms 13276 KB Output is correct
56 Correct 1211 ms 13652 KB Output is correct
57 Correct 1238 ms 13408 KB Output is correct
58 Correct 1223 ms 13752 KB Output is correct
59 Correct 1136 ms 13532 KB Output is correct
60 Correct 1284 ms 13568 KB Output is correct
61 Correct 1326 ms 13576 KB Output is correct
62 Correct 1349 ms 13496 KB Output is correct
63 Correct 1358 ms 13532 KB Output is correct
64 Correct 1349 ms 13532 KB Output is correct
65 Correct 1137 ms 13400 KB Output is correct
66 Correct 1296 ms 13160 KB Output is correct
67 Correct 1475 ms 13192 KB Output is correct
68 Correct 1062 ms 12592 KB Output is correct
69 Correct 1391 ms 13820 KB Output is correct
70 Correct 1184 ms 12684 KB Output is correct
71 Correct 1726 ms 14160 KB Output is correct
72 Correct 1257 ms 13812 KB Output is correct
73 Correct 1531 ms 14040 KB Output is correct