oj.uz

Submission #866746

# Submission time Handle Problem Language Result Execution time Memory
866746 2023-10-27T01:57:43 Z mgl_diamond Port Facility (JOI17_port_facility) C++17
100 / 100
 918 ms 77924 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ii = pair<int, int>;

#define foru(i, l, r) for(int i=(l); i<=(r); ++i)
#define ford(i, l, r) for(int i=(l); i>=(r); --i)
#define fore(x, v) for(auto &x : v)
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define fi first
#define se second
#define file "input"

void setIO() {
  ios::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
  if (fopen(file".inp", "r")) {
    freopen(file".inp", "r", stdin);
    freopen(file".out", "w", stdout);
  }
}

const int MOD = 1e9+7;
const int N = 1e6+5;

int n, anc[2*N];
ii cont[N];
set<ii> hold;

int root(int u) {
  return anc[u] < 0 ? u : anc[u] = root(anc[u]);
}

void join(int u, int v) {
  if ((u = root(u)) == (v = root(v))) return;
  if (anc[u] > anc[v]) swap(u, v);
  anc[u] += anc[v];
  anc[v] = u;
}

int main() {
  setIO();
  cin >> n;

  foru(i, 1, n) {
    int l, r;
    cin >> l >> r;
    cont[i] = {l, r};
  }

  foru(i, 1, 2*n) {
    anc[i] = -1;
  }

  sort(cont+1, cont+n+1);

  foru(i, 1, n) {
    int l = cont[i].fi, r = cont[i].se;
    auto lb = hold.lower_bound({l, 0});
    auto rb = hold.lower_bound({r, 0});

    if (lb == hold.end() || lb -> first >= r) {
      hold.insert({r, i});
      continue;
    }

    while (lb != rb) {
//      cout << lb -> second << " " << i << "\n";
      join(lb -> second, i + n);
      join(lb -> second + n, i);
      if (root(lb -> second) == root(prev(rb)->second)) break;
      ++lb;
    }

    hold.insert({r, i});
  }

  foru(i, 1, n) if (root(i) == root(i+n)) { cout << 0; return 0; }
  int ans = 1;
  foru(i, 1, n) if (root(i) == i) ans = ans * 2 % MOD;
  cout << ans;
}

Compilation message

port_facility.cpp: In function 'void setIO()':
port_facility.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen(file".inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
port_facility.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen(file".out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2648 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2648 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2648 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2648 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2392 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2392 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2648 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2648 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2392 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2392 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct
45 Correct 48 ms 11348 KB Output is correct
46 Correct 48 ms 11388 KB Output is correct
47 Correct 48 ms 11388 KB Output is correct
48 Correct 47 ms 11332 KB Output is correct
49 Correct 48 ms 11352 KB Output is correct
50 Correct 47 ms 11256 KB Output is correct
51 Correct 47 ms 11344 KB Output is correct
52 Correct 45 ms 11340 KB Output is correct
53 Correct 45 ms 11344 KB Output is correct
54 Correct 41 ms 11344 KB Output is correct
55 Correct 41 ms 11404 KB Output is correct
56 Correct 44 ms 11344 KB Output is correct
57 Correct 51 ms 11408 KB Output is correct
58 Correct 45 ms 11416 KB Output is correct
59 Correct 45 ms 11348 KB Output is correct
60 Correct 47 ms 11236 KB Output is correct
61 Correct 47 ms 11348 KB Output is correct
62 Correct 39 ms 11356 KB Output is correct
63 Correct 52 ms 11548 KB Output is correct
64 Correct 46 ms 11440 KB Output is correct
65 Correct 56 ms 11348 KB Output is correct
66 Correct 56 ms 11396 KB Output is correct
67 Correct 46 ms 11328 KB Output is correct
68 Correct 47 ms 12728 KB Output is correct
69 Correct 48 ms 12628 KB Output is correct
70 Correct 48 ms 12628 KB Output is correct
71 Correct 47 ms 12628 KB Output is correct
72 Correct 49 ms 12596 KB Output is correct
73 Correct 53 ms 12892 KB Output is correct
74 Correct 48 ms 12628 KB Output is correct
75 Correct 45 ms 12628 KB Output is correct
76 Correct 48 ms 12648 KB Output is correct
77 Correct 54 ms 12628 KB Output is correct
78 Correct 48 ms 12628 KB Output is correct
79 Correct 51 ms 12752 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2648 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2648 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2392 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2392 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct
45 Correct 48 ms 11348 KB Output is correct
46 Correct 48 ms 11388 KB Output is correct
47 Correct 48 ms 11388 KB Output is correct
48 Correct 47 ms 11332 KB Output is correct
49 Correct 48 ms 11352 KB Output is correct
50 Correct 47 ms 11256 KB Output is correct
51 Correct 47 ms 11344 KB Output is correct
52 Correct 45 ms 11340 KB Output is correct
53 Correct 45 ms 11344 KB Output is correct
54 Correct 41 ms 11344 KB Output is correct
55 Correct 41 ms 11404 KB Output is correct
56 Correct 44 ms 11344 KB Output is correct
57 Correct 51 ms 11408 KB Output is correct
58 Correct 45 ms 11416 KB Output is correct
59 Correct 45 ms 11348 KB Output is correct
60 Correct 47 ms 11236 KB Output is correct
61 Correct 47 ms 11348 KB Output is correct
62 Correct 39 ms 11356 KB Output is correct
63 Correct 52 ms 11548 KB Output is correct
64 Correct 46 ms 11440 KB Output is correct
65 Correct 56 ms 11348 KB Output is correct
66 Correct 56 ms 11396 KB Output is correct
67 Correct 46 ms 11328 KB Output is correct
68 Correct 47 ms 12728 KB Output is correct
69 Correct 48 ms 12628 KB Output is correct
70 Correct 48 ms 12628 KB Output is correct
71 Correct 47 ms 12628 KB Output is correct
72 Correct 49 ms 12596 KB Output is correct
73 Correct 53 ms 12892 KB Output is correct
74 Correct 48 ms 12628 KB Output is correct
75 Correct 45 ms 12628 KB Output is correct
76 Correct 48 ms 12648 KB Output is correct
77 Correct 54 ms 12628 KB Output is correct
78 Correct 48 ms 12628 KB Output is correct
79 Correct 51 ms 12752 KB Output is correct
80 Correct 533 ms 77628 KB Output is correct
81 Correct 534 ms 77560 KB Output is correct
82 Correct 535 ms 77808 KB Output is correct
83 Correct 533 ms 77596 KB Output is correct
84 Correct 541 ms 77628 KB Output is correct
85 Correct 523 ms 77596 KB Output is correct
86 Correct 526 ms 77392 KB Output is correct
87 Correct 776 ms 77428 KB Output is correct
88 Correct 777 ms 77528 KB Output is correct
89 Correct 647 ms 77660 KB Output is correct
90 Correct 595 ms 77412 KB Output is correct
91 Correct 568 ms 77652 KB Output is correct
92 Correct 625 ms 77624 KB Output is correct
93 Correct 752 ms 77532 KB Output is correct
94 Correct 521 ms 77864 KB Output is correct
95 Correct 539 ms 77676 KB Output is correct
96 Correct 527 ms 77436 KB Output is correct
97 Correct 480 ms 77648 KB Output is correct
98 Correct 519 ms 77576 KB Output is correct
99 Correct 512 ms 77596 KB Output is correct
100 Correct 867 ms 77468 KB Output is correct
101 Correct 918 ms 77652 KB Output is correct
102 Correct 689 ms 77508 KB Output is correct
103 Correct 676 ms 77648 KB Output is correct
104 Correct 660 ms 77496 KB Output is correct
105 Correct 615 ms 77396 KB Output is correct
106 Correct 585 ms 77544 KB Output is correct
107 Correct 592 ms 77472 KB Output is correct
108 Correct 606 ms 77668 KB Output is correct
109 Correct 600 ms 77924 KB Output is correct
110 Correct 556 ms 77540 KB Output is correct
111 Correct 569 ms 77396 KB Output is correct
112 Correct 569 ms 77512 KB Output is correct
113 Correct 542 ms 77784 KB Output is correct
114 Correct 542 ms 77396 KB Output is correct