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Submission #635768

# Submission time Handle Problem Language Result Execution time Memory
635768 2022-08-26T20:51:03 Z null_awe Stranded Far From Home (BOI22_island) C++14
100 / 100
 495 ms 39264 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<int, int>

vector<vector<int>> w;
vector<ll> vals;
vector<int> r, p;

int find(int a) { return a == p[a] ? a : p[a] = find(p[a]); }

void link(int a, int b) {
  a = find(a), b = find(b);
  if (a == b) return;
  if (r[a] < r[b]) swap(a, b);
  if (r[a] == r[b]) ++r[a];
  p[b] = a;
}

int main() {
  int n, m; cin >> n >> m;
  vector<int> arr(n); for (int i = 0; i < n; ++i) cin >> arr[i];
  set<int> nums; for (int num : arr) nums.insert(num);
  vector<int> copy(nums.begin(), nums.end());
  vector<vector<pii>> edges(copy.size());
  for (int i = 0; i < m; ++i) {
    int a, b; cin >> a >> b; --a, --b;
    edges[lower_bound(copy.begin(), copy.end(), max(arr[a], arr[b])) - copy.begin()].push_back({a, b});
  }
  w.resize(n), vals.resize(n), r.resize(n), p.resize(n);
  for (int i = 0; i < n; ++i) w[i].push_back(i), vals[i] = arr[i], p[i] = i;
  for (int i = 0; i < copy.size(); ++i) {
    for (pii edge : edges[i]) {
      int a = edge.first, b = edge.second;
      int pa = find(a), pb = find(b);
      if (pa == pb) continue;
      link(a, b);
      int np = find(a);
      if (vals[pa] < arr[b]) swap(w[np], w[pb]);
      else if (vals[pb] < arr[a]) swap(w[np], w[pa]);
      else {
        if (w[pa].size() < w[pb].size()) swap(w[pa], w[pb]);
        for (int v : w[pb]) w[pa].push_back(v);
        swap(w[np], w[pa]);
      }
      vals[np] = vals[pa] + vals[pb];
    }
  }
  vector<bool> ans(n);
  for (int v : w[find(0)]) ans[v] = true;
  for (int num : ans) cout << num;
  cout << '\n';
  return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:33:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   for (int i = 0; i < copy.size(); ++i) {
      |                   ~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 3 ms 596 KB Output is correct
6 Correct 3 ms 468 KB Output is correct
7 Correct 3 ms 528 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 3 ms 468 KB Output is correct
10 Correct 3 ms 608 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 432 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 296 KB Output is correct
2 Correct 0 ms 296 KB Output is correct
3 Correct 332 ms 36132 KB Output is correct
4 Correct 222 ms 24252 KB Output is correct
5 Correct 328 ms 36364 KB Output is correct
6 Correct 378 ms 33448 KB Output is correct
7 Correct 350 ms 37568 KB Output is correct
8 Correct 267 ms 22780 KB Output is correct
9 Correct 306 ms 33772 KB Output is correct
10 Correct 235 ms 28356 KB Output is correct
11 Correct 208 ms 19000 KB Output is correct
12 Correct 241 ms 19120 KB Output is correct
13 Correct 240 ms 25300 KB Output is correct
14 Correct 243 ms 25024 KB Output is correct
15 Correct 341 ms 38092 KB Output is correct
16 Correct 263 ms 37588 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 495 ms 38552 KB Output is correct
3 Correct 445 ms 35132 KB Output is correct
4 Correct 298 ms 26112 KB Output is correct
5 Correct 253 ms 26180 KB Output is correct
6 Correct 464 ms 39252 KB Output is correct
7 Correct 353 ms 38612 KB Output is correct
8 Correct 344 ms 38584 KB Output is correct
9 Correct 264 ms 38152 KB Output is correct
10 Correct 342 ms 29436 KB Output is correct
11 Correct 243 ms 23812 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 278 ms 19328 KB Output is correct
3 Correct 275 ms 20256 KB Output is correct
4 Correct 312 ms 21532 KB Output is correct
5 Correct 275 ms 22764 KB Output is correct
6 Correct 288 ms 20640 KB Output is correct
7 Correct 235 ms 19840 KB Output is correct
8 Correct 201 ms 19356 KB Output is correct
9 Correct 158 ms 11448 KB Output is correct
10 Correct 216 ms 23628 KB Output is correct
11 Correct 220 ms 23120 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 3 ms 596 KB Output is correct
6 Correct 3 ms 468 KB Output is correct
7 Correct 3 ms 528 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 3 ms 468 KB Output is correct
10 Correct 3 ms 608 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 432 KB Output is correct
15 Correct 0 ms 296 KB Output is correct
16 Correct 0 ms 296 KB Output is correct
17 Correct 332 ms 36132 KB Output is correct
18 Correct 222 ms 24252 KB Output is correct
19 Correct 328 ms 36364 KB Output is correct
20 Correct 378 ms 33448 KB Output is correct
21 Correct 350 ms 37568 KB Output is correct
22 Correct 267 ms 22780 KB Output is correct
23 Correct 306 ms 33772 KB Output is correct
24 Correct 235 ms 28356 KB Output is correct
25 Correct 208 ms 19000 KB Output is correct
26 Correct 241 ms 19120 KB Output is correct
27 Correct 240 ms 25300 KB Output is correct
28 Correct 243 ms 25024 KB Output is correct
29 Correct 341 ms 38092 KB Output is correct
30 Correct 263 ms 37588 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 495 ms 38552 KB Output is correct
33 Correct 445 ms 35132 KB Output is correct
34 Correct 298 ms 26112 KB Output is correct
35 Correct 253 ms 26180 KB Output is correct
36 Correct 464 ms 39252 KB Output is correct
37 Correct 353 ms 38612 KB Output is correct
38 Correct 344 ms 38584 KB Output is correct
39 Correct 264 ms 38152 KB Output is correct
40 Correct 342 ms 29436 KB Output is correct
41 Correct 243 ms 23812 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 278 ms 19328 KB Output is correct
44 Correct 275 ms 20256 KB Output is correct
45 Correct 312 ms 21532 KB Output is correct
46 Correct 275 ms 22764 KB Output is correct
47 Correct 288 ms 20640 KB Output is correct
48 Correct 235 ms 19840 KB Output is correct
49 Correct 201 ms 19356 KB Output is correct
50 Correct 158 ms 11448 KB Output is correct
51 Correct 216 ms 23628 KB Output is correct
52 Correct 220 ms 23120 KB Output is correct
53 Correct 0 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 0 ms 300 KB Output is correct
56 Correct 3 ms 640 KB Output is correct
57 Correct 3 ms 596 KB Output is correct
58 Correct 2 ms 440 KB Output is correct
59 Correct 3 ms 592 KB Output is correct
60 Correct 3 ms 468 KB Output is correct
61 Correct 2 ms 440 KB Output is correct
62 Correct 3 ms 564 KB Output is correct
63 Correct 3 ms 596 KB Output is correct
64 Correct 3 ms 596 KB Output is correct
65 Correct 2 ms 468 KB Output is correct
66 Correct 2 ms 468 KB Output is correct
67 Correct 337 ms 36788 KB Output is correct
68 Correct 223 ms 25092 KB Output is correct
69 Correct 338 ms 37228 KB Output is correct
70 Correct 329 ms 34368 KB Output is correct
71 Correct 350 ms 38440 KB Output is correct
72 Correct 280 ms 23572 KB Output is correct
73 Correct 316 ms 34696 KB Output is correct
74 Correct 237 ms 29252 KB Output is correct
75 Correct 205 ms 19884 KB Output is correct
76 Correct 212 ms 20084 KB Output is correct
77 Correct 231 ms 26372 KB Output is correct
78 Correct 233 ms 25892 KB Output is correct
79 Correct 377 ms 38664 KB Output is correct
80 Correct 264 ms 38344 KB Output is correct
81 Correct 411 ms 39088 KB Output is correct
82 Correct 375 ms 35128 KB Output is correct
83 Correct 275 ms 26144 KB Output is correct
84 Correct 218 ms 26120 KB Output is correct
85 Correct 418 ms 39264 KB Output is correct
86 Correct 323 ms 38436 KB Output is correct
87 Correct 316 ms 38420 KB Output is correct
88 Correct 259 ms 29284 KB Output is correct
89 Correct 226 ms 23632 KB Output is correct
90 Correct 248 ms 19764 KB Output is correct
91 Correct 248 ms 20112 KB Output is correct
92 Correct 253 ms 21424 KB Output is correct
93 Correct 256 ms 22688 KB Output is correct
94 Correct 257 ms 20548 KB Output is correct
95 Correct 228 ms 19768 KB Output is correct
96 Correct 184 ms 19216 KB Output is correct
97 Correct 152 ms 11376 KB Output is correct
98 Correct 220 ms 23336 KB Output is correct
99 Correct 203 ms 22892 KB Output is correct
100 Correct 109 ms 4228 KB Output is correct
101 Correct 378 ms 33400 KB Output is correct
102 Correct 223 ms 16832 KB Output is correct
103 Correct 305 ms 27356 KB Output is correct
104 Correct 406 ms 35992 KB Output is correct