oj.uz

Submission #300740

# Submission time Handle Problem Language Result Execution time Memory
300740 2020-09-17T12:55:44 Z IgorI Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 294 ms 22264 KB 
#include <bits/stdc++.h>

using namespace std;

#define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)

void build(vector<vector<int> > b) ;

void build(vector<vector<int> > b) ;

int Root(int x, vector<int> &root)
{
    if (x == root[x]) return x;
    return root[x] = Root(root[x], root);
}

void Merge(int v, int u, vector<int> &root, vector<int> &sz)
{
    v = Root(v, root), u = Root(u, root);
    if (v == u) return;
    if (sz[v] > sz[u]) swap(v, u);
    sz[u] += sz[v];
    root[v] = u;
}

int construct(vector<vector<int> > p)
{
    int n = p.size();
    vector<int> root(n), sz(n);
    for (int i = 0; i < n; i++) root[i] = i, sz[i] = 1;
    int t = 0;
    forn(i, n)
    {
        forn(j, n)
        {
            if (p[i][j])
            {
                Merge(i, j, root, sz);
            }
        }
    }
    forn(i, n)
    {
        forn(j, n)
        {
            if (Root(i, root) == Root(j, root) && p[i][j] == 0)
            {
                return 0;
            }
        }
    }
    vector<vector<int> > b(n, vector<int>(n));
    forn(i, n)
    {
        vector<int> L;
        forn(j, n)
        {
            if (Root(j, root) == i)
            {
                L.push_back(j);
            }
        }
        vector<int> root2(L.size()), sz2(L.size());
        iota(root2.begin(), root2.end(), 0);
        fill(sz2.begin(), sz2.end(), 1);
        for (int a = 0; a < L.size(); a++)
        {
            for (int b = 0; b < L.size(); b++)
            {
                if (p[L[a]][L[b]] == 1)
                {
                    Merge(a, b, root2, sz2);
                }
            }
        }
        for (int a = 0; a < L.size(); a++)
        {
            for (int b = 0; b < L.size(); b++)
            {
                if (p[L[a]][L[b]] == 2 && Root(a, root2) == Root(b, root2))
                    return 0;
            }
        }
        vector<vector<int> > z(L.size());
        for (int a = 0; a < L.size(); a++)
        {
            z[Root(a, root2)].push_back(L[a]);
        }
        vector<int> q;
        for (int j = 0; j < z.size(); j++)
        {
            if (z[j].size()) q.push_back(j);
            for (int e = 0; e + 1 < z[j].size(); e++)
            {
                b[z[j][e]][z[j][e + 1]] = 1;
                b[z[j][e + 1]][z[j][e]] = 1;
            }
        }
        if (q.size() == 2)
        {
            return 0;
        }
        if (q.size() > 2)
        for (int i = 0; i < q.size(); i++)
        {
            b[q[i]][q[(i + 1) % q.size()]] = 1;
            b[q[(i + 1) % q.size()]][q[i]] = 1;
        }
    }
    build(b);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:32:5: note: in expansion of macro 'forn'
   32 |     forn(i, n)
      |     ^~~~
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:34:9: note: in expansion of macro 'forn'
   34 |         forn(j, n)
      |         ^~~~
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:42:5: note: in expansion of macro 'forn'
   42 |     forn(i, n)
      |     ^~~~
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:44:9: note: in expansion of macro 'forn'
   44 |         forn(j, n)
      |         ^~~~
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:53:5: note: in expansion of macro 'forn'
   53 |     forn(i, n)
      |     ^~~~
supertrees.cpp:5:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
      |                             ^
supertrees.cpp:56:9: note: in expansion of macro 'forn'
   56 |         forn(j, n)
      |         ^~~~
supertrees.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         for (int a = 0; a < L.size(); a++)
      |                         ~~^~~~~~~~~~
supertrees.cpp:68:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             for (int b = 0; b < L.size(); b++)
      |                             ~~^~~~~~~~~~
supertrees.cpp:76:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         for (int a = 0; a < L.size(); a++)
      |                         ~~^~~~~~~~~~
supertrees.cpp:78:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |             for (int b = 0; b < L.size(); b++)
      |                             ~~^~~~~~~~~~
supertrees.cpp:85:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for (int a = 0; a < L.size(); a++)
      |                         ~~^~~~~~~~~~
supertrees.cpp:90:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |         for (int j = 0; j < z.size(); j++)
      |                         ~~^~~~~~~~~~
supertrees.cpp:93:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |             for (int e = 0; e + 1 < z[j].size(); e++)
      |                             ~~~~~~^~~~~~~~~~~~~
supertrees.cpp:104:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |         for (int i = 0; i < q.size(); i++)
      |                         ~~^~~~~~~~~~
supertrees.cpp:31:9: warning: unused variable 't' [-Wunused-variable]
   31 |     int t = 0;
      |         ^

Subtask #1
11.0 / 11.0

# 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 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 12 ms 1152 KB Output is correct
7 Correct 291 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 1 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 1 ms 256 KB Output is correct
6 Correct 12 ms 1152 KB Output is correct
7 Correct 291 ms 22136 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 242 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 116 ms 8148 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 70 ms 5752 KB Output is correct
21 Correct 254 ms 22136 KB Output is correct
22 Correct 254 ms 22252 KB Output is correct
23 Correct 294 ms 22136 KB Output is correct
24 Correct 245 ms 22264 KB Output is correct
25 Correct 103 ms 8184 KB Output is correct
26 Correct 95 ms 8312 KB Output is correct
27 Correct 284 ms 22136 KB Output is correct
28 Correct 247 ms 22136 KB Output is correct

Subtask #3
0 / 19.0

# 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 384 KB Output is correct
4 Correct 1 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 1 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 1 ms 256 KB Output is correct
12 Correct 12 ms 1152 KB Output is correct
13 Correct 277 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 640 KB Output is correct
17 Correct 115 ms 8184 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Incorrect 67 ms 5880 KB Too many ways to get from 0 to 1, should be 0 found no less than 1
22 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 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 384 KB Output is correct
4 Correct 63 ms 5752 KB Output is correct
5 Correct 257 ms 22136 KB Output is correct
6 Correct 252 ms 22136 KB Output is correct
7 Correct 283 ms 22136 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Incorrect 67 ms 5752 KB Too many ways to get from 0 to 1, should be 0 found no less than 1
10 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 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 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 12 ms 1152 KB Output is correct
7 Correct 291 ms 22136 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 242 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 116 ms 8148 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 70 ms 5752 KB Output is correct
21 Correct 254 ms 22136 KB Output is correct
22 Correct 254 ms 22252 KB Output is correct
23 Correct 294 ms 22136 KB Output is correct
24 Correct 245 ms 22264 KB Output is correct
25 Correct 103 ms 8184 KB Output is correct
26 Correct 95 ms 8312 KB Output is correct
27 Correct 284 ms 22136 KB Output is correct
28 Correct 247 ms 22136 KB Output is correct
29 Correct 1 ms 256 KB Output is correct
30 Correct 1 ms 256 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 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 1 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 1 ms 256 KB Output is correct
40 Correct 12 ms 1152 KB Output is correct
41 Correct 277 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 640 KB Output is correct
45 Correct 115 ms 8184 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Incorrect 67 ms 5880 KB Too many ways to get from 0 to 1, should be 0 found no less than 1
50 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 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 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 12 ms 1152 KB Output is correct
7 Correct 291 ms 22136 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 242 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 116 ms 8148 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 70 ms 5752 KB Output is correct
21 Correct 254 ms 22136 KB Output is correct
22 Correct 254 ms 22252 KB Output is correct
23 Correct 294 ms 22136 KB Output is correct
24 Correct 245 ms 22264 KB Output is correct
25 Correct 103 ms 8184 KB Output is correct
26 Correct 95 ms 8312 KB Output is correct
27 Correct 284 ms 22136 KB Output is correct
28 Correct 247 ms 22136 KB Output is correct
29 Correct 1 ms 256 KB Output is correct
30 Correct 1 ms 256 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 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 1 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 1 ms 256 KB Output is correct
40 Correct 12 ms 1152 KB Output is correct
41 Correct 277 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 640 KB Output is correct
45 Correct 115 ms 8184 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Incorrect 67 ms 5880 KB Too many ways to get from 0 to 1, should be 0 found no less than 1
50 Halted 0 ms 0 KB -