oj.uz

Submission #310195

# Submission time Handle Problem Language Result Execution time Memory
310195 2020-10-06T07:48:20 Z Lemur95 Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 258 ms 22272 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
#pragma GCC optimize("Ofast")
#define x first
#define y second
#define ld long double
#define ll long long

using namespace std;

/*void build(vector <vector <int>> b) {
  for(int i = 0; i < b.size(); i++) {
    for(int j = 0; j < b[i].size(); j++)
      cout << b[i][j] << " ";
    cout << "\n";
  }
}*/

int construct(vector <vector <int>> p) {
  int n = p.size();
  for(int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++) {
      if(p[i][j] == 3)
        return 0;
    }
  }
  // structures can be like: a chain and a cycle / a cycle / a chain
  // nodes in cycle have all values in p = 2 or 0
  vector <vector <int>> adj(n);
  vector <int> comp(n), chain(n), from(n, -1), nodes;
  vector <bool> viz(n);
  int cnt = 0;
  for(int i = 0; i < n; i++)
    adj[i].resize(n);
  for(int i = 0; i < n; i++) {
    if(!comp[i])
      comp[i] = ++cnt;
    else
      continue;
    for(int j = 0; j < n; j++) {
      if(p[i][j])
        comp[j] = cnt;
    }
  }
  for(int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++) {
      if((comp[i] == comp[j]) ^ (p[i][j] != 0))
        return 0;
    }
  }
  cnt = 0;
  for(int i = 0; i < n; i++) {
    if(!chain[i])
      chain[i] = ++cnt, nodes.push_back(i);
    else
      continue;
    for(int j = 0; j < n; j++) {
      if(p[i][j] == 1) {
        chain[j] = cnt;
        from[j] = i;
      }
    }
  }
  for(int i = 0; i < n; i++) {
    if(from[i] >= 0 && from[i] != i)
      adj[i][from[i]] = adj[from[i]][i] = 1;
  }
  for(int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++) {
      if((chain[i] == chain[j] ^ (p[i][j] == 1)))
        return 0;
    }
  }
  for(auto &i : nodes) {
    if(viz[i])
      continue;
    vector <int> v;
    for(auto &j : nodes) {
      if(!viz[j] && comp[i] == comp[j])
        v.push_back(j), viz[j] = 1;
    }
    if(v.size() == 2)
      return 0;
    if(v.size() == 1)
      continue;
    for(int j = 0; j < v.size(); j++) {
      int k = (j + 1) % v.size();
      if(v[k] != v[j])
        adj[v[j]][v[k]] = adj[v[k]][v[j]] = 1;
    }
  }
  build(adj);
  return 1;
}

/*int main() {
  int n;
  vector <vector <int>> p;
  cin >> n;
  p.resize(n);
  for(int i = 0; i < n; i++) {
    p[i].resize(n);
    for(int j = 0; j < n; j++)
      cin >> p[i][j];
  }
  cout << construct(p);
  return 0;
}*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:70:20: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
   70 |       if((chain[i] == chain[j] ^ (p[i][j] == 1)))
supertrees.cpp:86:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     for(int j = 0; j < v.size(); j++) {
      |                    ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 258 ms 22136 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 258 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 288 KB Output is correct
12 Correct 11 ms 1152 KB Output is correct
13 Correct 240 ms 22104 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 111 ms 12156 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 245 ms 22136 KB Output is correct
22 Correct 236 ms 22092 KB Output is correct
23 Correct 254 ms 22136 KB Output is correct
24 Correct 237 ms 22136 KB Output is correct
25 Correct 97 ms 12152 KB Output is correct
26 Correct 115 ms 12152 KB Output is correct
27 Correct 251 ms 22136 KB Output is correct
28 Correct 241 ms 22136 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 10 ms 1152 KB Output is correct
9 Correct 239 ms 22136 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 12 ms 1152 KB Output is correct
13 Correct 258 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 109 ms 12152 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 70 ms 5880 KB Output is correct
22 Correct 238 ms 22172 KB Output is correct
23 Correct 241 ms 22136 KB Output is correct
24 Correct 257 ms 22140 KB Output is correct
25 Correct 99 ms 12152 KB Output is correct
26 Correct 96 ms 12152 KB Output is correct
27 Correct 241 ms 22140 KB Output is correct
28 Correct 255 ms 22136 KB Output is correct
29 Correct 99 ms 12152 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 63 ms 5752 KB Output is correct
5 Correct 237 ms 22136 KB Output is correct
6 Correct 234 ms 22136 KB Output is correct
7 Correct 252 ms 22104 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 59 ms 5752 KB Output is correct
10 Correct 240 ms 22136 KB Output is correct
11 Correct 238 ms 22272 KB Output is correct
12 Correct 253 ms 22136 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 62 ms 5752 KB Output is correct
17 Correct 240 ms 22136 KB Output is correct
18 Correct 237 ms 22136 KB Output is correct
19 Correct 242 ms 22136 KB Output is correct
20 Correct 240 ms 22100 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 258 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 288 KB Output is correct
12 Correct 11 ms 1152 KB Output is correct
13 Correct 240 ms 22104 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 111 ms 12156 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 245 ms 22136 KB Output is correct
22 Correct 236 ms 22092 KB Output is correct
23 Correct 254 ms 22136 KB Output is correct
24 Correct 237 ms 22136 KB Output is correct
25 Correct 97 ms 12152 KB Output is correct
26 Correct 115 ms 12152 KB Output is correct
27 Correct 251 ms 22136 KB Output is correct
28 Correct 241 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 0 ms 256 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 239 ms 22136 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 256 KB Output is correct
40 Correct 12 ms 1152 KB Output is correct
41 Correct 258 ms 22136 KB Output is correct
42 Correct 1 ms 256 KB Output is correct
43 Correct 1 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 109 ms 12152 KB Output is correct
46 Correct 0 ms 256 KB Output is correct
47 Correct 1 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Correct 70 ms 5880 KB Output is correct
50 Correct 238 ms 22172 KB Output is correct
51 Correct 241 ms 22136 KB Output is correct
52 Correct 257 ms 22140 KB Output is correct
53 Correct 99 ms 12152 KB Output is correct
54 Correct 96 ms 12152 KB Output is correct
55 Correct 241 ms 22140 KB Output is correct
56 Correct 255 ms 22136 KB Output is correct
57 Correct 99 ms 12152 KB Output is correct
58 Correct 0 ms 256 KB Output is correct
59 Correct 0 ms 256 KB Output is correct
60 Correct 5 ms 768 KB Output is correct
61 Correct 113 ms 12120 KB Output is correct
62 Correct 0 ms 256 KB Output is correct
63 Correct 0 ms 256 KB Output is correct
64 Correct 0 ms 256 KB Output is correct
65 Correct 62 ms 5880 KB Output is correct
66 Correct 97 ms 12116 KB Output is correct
67 Correct 101 ms 12184 KB Output is correct
68 Correct 98 ms 12188 KB Output is correct
69 Correct 98 ms 12124 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 258 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 288 KB Output is correct
12 Correct 11 ms 1152 KB Output is correct
13 Correct 240 ms 22104 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 111 ms 12156 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 245 ms 22136 KB Output is correct
22 Correct 236 ms 22092 KB Output is correct
23 Correct 254 ms 22136 KB Output is correct
24 Correct 237 ms 22136 KB Output is correct
25 Correct 97 ms 12152 KB Output is correct
26 Correct 115 ms 12152 KB Output is correct
27 Correct 251 ms 22136 KB Output is correct
28 Correct 241 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 0 ms 256 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 239 ms 22136 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 256 KB Output is correct
40 Correct 12 ms 1152 KB Output is correct
41 Correct 258 ms 22136 KB Output is correct
42 Correct 1 ms 256 KB Output is correct
43 Correct 1 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 109 ms 12152 KB Output is correct
46 Correct 0 ms 256 KB Output is correct
47 Correct 1 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Correct 70 ms 5880 KB Output is correct
50 Correct 238 ms 22172 KB Output is correct
51 Correct 241 ms 22136 KB Output is correct
52 Correct 257 ms 22140 KB Output is correct
53 Correct 99 ms 12152 KB Output is correct
54 Correct 96 ms 12152 KB Output is correct
55 Correct 241 ms 22140 KB Output is correct
56 Correct 255 ms 22136 KB Output is correct
57 Correct 99 ms 12152 KB Output is correct
58 Correct 1 ms 256 KB Output is correct
59 Correct 1 ms 256 KB Output is correct
60 Correct 1 ms 256 KB Output is correct
61 Correct 63 ms 5752 KB Output is correct
62 Correct 237 ms 22136 KB Output is correct
63 Correct 234 ms 22136 KB Output is correct
64 Correct 252 ms 22104 KB Output is correct
65 Correct 0 ms 256 KB Output is correct
66 Correct 59 ms 5752 KB Output is correct
67 Correct 240 ms 22136 KB Output is correct
68 Correct 238 ms 22272 KB Output is correct
69 Correct 253 ms 22136 KB Output is correct
70 Correct 0 ms 256 KB Output is correct
71 Correct 0 ms 256 KB Output is correct
72 Correct 1 ms 256 KB Output is correct
73 Correct 62 ms 5752 KB Output is correct
74 Correct 240 ms 22136 KB Output is correct
75 Correct 237 ms 22136 KB Output is correct
76 Correct 242 ms 22136 KB Output is correct
77 Correct 240 ms 22100 KB Output is correct
78 Correct 0 ms 256 KB Output is correct
79 Correct 0 ms 256 KB Output is correct
80 Correct 5 ms 768 KB Output is correct
81 Correct 113 ms 12120 KB Output is correct
82 Correct 0 ms 256 KB Output is correct
83 Correct 0 ms 256 KB Output is correct
84 Correct 0 ms 256 KB Output is correct
85 Correct 62 ms 5880 KB Output is correct
86 Correct 97 ms 12116 KB Output is correct
87 Correct 101 ms 12184 KB Output is correct
88 Correct 98 ms 12188 KB Output is correct
89 Correct 98 ms 12124 KB Output is correct
90 Correct 0 ms 256 KB Output is correct
91 Correct 1 ms 256 KB Output is correct
92 Correct 5 ms 640 KB Output is correct
93 Correct 112 ms 8184 KB Output is correct
94 Correct 1 ms 256 KB Output is correct
95 Correct 0 ms 256 KB Output is correct
96 Correct 0 ms 256 KB Output is correct
97 Correct 23 ms 2296 KB Output is correct
98 Correct 93 ms 8184 KB Output is correct
99 Correct 106 ms 8148 KB Output is correct
100 Correct 98 ms 8184 KB Output is correct
101 Correct 94 ms 8184 KB Output is correct
102 Correct 112 ms 8280 KB Output is correct
103 Correct 112 ms 8184 KB Output is correct
104 Correct 119 ms 8160 KB Output is correct
105 Correct 109 ms 8152 KB Output is correct