oj.uz

Submission #401271

# Submission time Handle Problem Language Result Execution time Memory
401271 2021-05-09T17:52:01 Z my99n Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 282 ms 26060 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

vector<vector<int>> answer;
void connect (int u, int v) { answer[u][v] = answer[v][u] = 1; }

int p[2000];
int find (int u) { return u==p[u]? u:p[u]=find(p[u]); }
bool merge (int i, int j) {
  if (find(i) == find(j)) return false;
  p[find(i)] = find(j);
  connect(i, j);
  return true;
}

vector<int> c;
vector<vector<int>> r;
int n;
void relax(int i) {
  for (int j = i+1; j < n; j++) {
    if (r[i][j] != 0) c.push_back(j);
  }
  c.push_back(i);
  for (auto x : c) {
    for (auto y : c) {
      r[x][y] = r[y][x] = 0;
    }
  }
}

int construct(vector<vector<int>> req) {
  r = req; n = req.size();
	for (int i = 0; i < n; i++) {
		vector<int> row = vector<int>(n);
		answer.push_back(row);
	}
  iota(p, p+n+1, 0);

  for  (int i = 0; i < n; i++) {
    for (int j = i+1; j < n; j++) {
      if (req[i][j] == 1) merge(i, j);
    }
  }

  for  (int i = 0; i < n; i++) {
    for (int j = i+1; j < n; j++) {
      if (r[i][j] == 2) {
        c.clear();
        relax(i);
        int first = -1, last = 0;
        for (int x = 1; x < c.size(); x++) {
          if (merge(c[last], c[x])) {
            if (first == -1) first = last;
            last = x;
          }
        } 
        if (first == -1 or c.size() <= 2) return 0;
        connect(c[last], c[first]);
      }
    }
  }

  for  (int i = 0; i < n; i++) {
    for (int j = i+1; j < n; j++) {
      if (req[i][j] == 0 and find(i) == find(j)) return 0;
      if (req[i][j] == 3) return 0;
    }
  }

	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         for (int x = 1; x < c.size(); x++) {
      |                         ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 11 ms 1352 KB Output is correct
7 Correct 250 ms 26000 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 11 ms 1352 KB Output is correct
7 Correct 250 ms 26000 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 11 ms 1356 KB Output is correct
13 Correct 254 ms 26004 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 121 ms 16068 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 62 ms 6660 KB Output is correct
21 Correct 282 ms 25964 KB Output is correct
22 Correct 250 ms 25916 KB Output is correct
23 Correct 263 ms 25924 KB Output is correct
24 Correct 249 ms 26060 KB Output is correct
25 Correct 120 ms 16016 KB Output is correct
26 Correct 106 ms 16012 KB Output is correct
27 Correct 265 ms 25968 KB Output is correct
28 Correct 242 ms 25924 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 11 ms 1352 KB Output is correct
9 Correct 242 ms 26012 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 11 ms 1336 KB Output is correct
13 Correct 250 ms 25924 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 7 ms 844 KB Output is correct
17 Correct 122 ms 16020 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 63 ms 6664 KB Output is correct
22 Correct 252 ms 26000 KB Output is correct
23 Correct 253 ms 25940 KB Output is correct
24 Correct 268 ms 25996 KB Output is correct
25 Correct 105 ms 16068 KB Output is correct
26 Correct 106 ms 16004 KB Output is correct
27 Correct 249 ms 25996 KB Output is correct
28 Correct 261 ms 26020 KB Output is correct
29 Correct 107 ms 16068 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 63 ms 6760 KB Output is correct
5 Correct 260 ms 25988 KB Output is correct
6 Correct 250 ms 26000 KB Output is correct
7 Correct 263 ms 26000 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 66 ms 6656 KB Output is correct
10 Correct 255 ms 25984 KB Output is correct
11 Correct 254 ms 26000 KB Output is correct
12 Correct 277 ms 25984 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 65 ms 6804 KB Output is correct
17 Correct 248 ms 26000 KB Output is correct
18 Correct 252 ms 26052 KB Output is correct
19 Correct 249 ms 25964 KB Output is correct
20 Correct 243 ms 26004 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 11 ms 1352 KB Output is correct
7 Correct 250 ms 26000 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 11 ms 1356 KB Output is correct
13 Correct 254 ms 26004 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 121 ms 16068 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 62 ms 6660 KB Output is correct
21 Correct 282 ms 25964 KB Output is correct
22 Correct 250 ms 25916 KB Output is correct
23 Correct 263 ms 25924 KB Output is correct
24 Correct 249 ms 26060 KB Output is correct
25 Correct 120 ms 16016 KB Output is correct
26 Correct 106 ms 16012 KB Output is correct
27 Correct 265 ms 25968 KB Output is correct
28 Correct 242 ms 25924 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 11 ms 1352 KB Output is correct
37 Correct 242 ms 26012 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 1 ms 204 KB Output is correct
40 Correct 11 ms 1336 KB Output is correct
41 Correct 250 ms 25924 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 7 ms 844 KB Output is correct
45 Correct 122 ms 16020 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 63 ms 6664 KB Output is correct
50 Correct 252 ms 26000 KB Output is correct
51 Correct 253 ms 25940 KB Output is correct
52 Correct 268 ms 25996 KB Output is correct
53 Correct 105 ms 16068 KB Output is correct
54 Correct 106 ms 16004 KB Output is correct
55 Correct 249 ms 25996 KB Output is correct
56 Correct 261 ms 26020 KB Output is correct
57 Correct 107 ms 16068 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 6 ms 936 KB Output is correct
61 Correct 125 ms 16008 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 76 ms 6660 KB Output is correct
66 Correct 110 ms 16012 KB Output is correct
67 Correct 110 ms 16072 KB Output is correct
68 Correct 105 ms 16020 KB Output is correct
69 Correct 118 ms 16020 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 11 ms 1352 KB Output is correct
7 Correct 250 ms 26000 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 11 ms 1356 KB Output is correct
13 Correct 254 ms 26004 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 121 ms 16068 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 62 ms 6660 KB Output is correct
21 Correct 282 ms 25964 KB Output is correct
22 Correct 250 ms 25916 KB Output is correct
23 Correct 263 ms 25924 KB Output is correct
24 Correct 249 ms 26060 KB Output is correct
25 Correct 120 ms 16016 KB Output is correct
26 Correct 106 ms 16012 KB Output is correct
27 Correct 265 ms 25968 KB Output is correct
28 Correct 242 ms 25924 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 11 ms 1352 KB Output is correct
37 Correct 242 ms 26012 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 1 ms 204 KB Output is correct
40 Correct 11 ms 1336 KB Output is correct
41 Correct 250 ms 25924 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 7 ms 844 KB Output is correct
45 Correct 122 ms 16020 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 63 ms 6664 KB Output is correct
50 Correct 252 ms 26000 KB Output is correct
51 Correct 253 ms 25940 KB Output is correct
52 Correct 268 ms 25996 KB Output is correct
53 Correct 105 ms 16068 KB Output is correct
54 Correct 106 ms 16004 KB Output is correct
55 Correct 249 ms 25996 KB Output is correct
56 Correct 261 ms 26020 KB Output is correct
57 Correct 107 ms 16068 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 1 ms 204 KB Output is correct
61 Correct 63 ms 6760 KB Output is correct
62 Correct 260 ms 25988 KB Output is correct
63 Correct 250 ms 26000 KB Output is correct
64 Correct 263 ms 26000 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 66 ms 6656 KB Output is correct
67 Correct 255 ms 25984 KB Output is correct
68 Correct 254 ms 26000 KB Output is correct
69 Correct 277 ms 25984 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Correct 1 ms 204 KB Output is correct
72 Correct 1 ms 204 KB Output is correct
73 Correct 65 ms 6804 KB Output is correct
74 Correct 248 ms 26000 KB Output is correct
75 Correct 252 ms 26052 KB Output is correct
76 Correct 249 ms 25964 KB Output is correct
77 Correct 243 ms 26004 KB Output is correct
78 Correct 1 ms 204 KB Output is correct
79 Correct 1 ms 204 KB Output is correct
80 Correct 6 ms 936 KB Output is correct
81 Correct 125 ms 16008 KB Output is correct
82 Correct 1 ms 204 KB Output is correct
83 Correct 1 ms 204 KB Output is correct
84 Correct 1 ms 204 KB Output is correct
85 Correct 76 ms 6660 KB Output is correct
86 Correct 110 ms 16012 KB Output is correct
87 Correct 110 ms 16072 KB Output is correct
88 Correct 105 ms 16020 KB Output is correct
89 Correct 118 ms 16020 KB Output is correct
90 Correct 1 ms 204 KB Output is correct
91 Correct 1 ms 204 KB Output is correct
92 Correct 5 ms 844 KB Output is correct
93 Correct 116 ms 16132 KB Output is correct
94 Correct 1 ms 204 KB Output is correct
95 Correct 1 ms 204 KB Output is correct
96 Correct 1 ms 204 KB Output is correct
97 Correct 27 ms 4172 KB Output is correct
98 Correct 108 ms 16016 KB Output is correct
99 Correct 108 ms 16004 KB Output is correct
100 Correct 109 ms 16000 KB Output is correct
101 Correct 111 ms 16064 KB Output is correct
102 Correct 110 ms 16016 KB Output is correct
103 Correct 113 ms 16012 KB Output is correct
104 Correct 128 ms 16000 KB Output is correct
105 Correct 126 ms 16068 KB Output is correct