Submission #471525

#	Time	Username	Problem	Language	Result	Execution time	Memory
471525		blue	Parachute rings (IOI12_rings)	C++17	Compilation error	0 ms	0 KiB

rings

#include <iostream>
#include <vector>
using namespace std;

struct disjoint_set
{
    int S;
    vector<short> parent;
    vector<short> subtree;

    disjoint_set()
    {
        ;
    }

    disjoint_set(int s)
    {
        S = s;
        parent = vector<int>(S);
        subtree = vector<int>(S);
        for(int i = 0; i < S; i++)
        {
            parent[i] = i;
            subtree[i] = 1;
        }
    }

    int root(int u)
    {
        int v = u;
        while(parent[v] != v) v = parent[v];
        parent[u] = v;
        return v;
    }

    bool connected(int u, int v)
    {
        return root(u) == root(v);
    }

    void join(int u, int v)
    {
        u = root(u);
        v = root(v);
        if(u == v) return;
        if(subtree[u] < subtree[v]) swap(u, v);

        subtree[u] += subtree[v];
        parent[v] = u;
    }
};

const int X = 0;
const int Y = 1;
const int Z = 2;

int state = Z;
int N;


vector<int> Z_critical;
vector< vector<short> > Z_degree;
vector<disjoint_set> DSU;
vector<bool> good;

void Init(int N_)
{
    N = N_;
    for(int i = 0; i < N; i++)
    {
        Z_critical.push_back(i);
        Z_degree.push_back(vector<int>(N, 0));
        DSU.push_back(disjoint_set(N));
        good.push_back(1);
    }
}

void Link(int A, int B)
{
    if(state == Z)
    {
        for(int q = 0; q < (int)Z_critical.size(); q++)
        {
            int z = Z_critical[q];
            if(A == z || B == z)
            {
                continue;
            }
            if(DSU[q].connected(A, B))
            {
                good[q] = 0;
            }
            Z_degree[q][A]++;
            Z_degree[q][B]++;
            if(Z_degree[q][A] > 2 || Z_degree[q][B] > 2)
                good[q] = 0;

            DSU[q].join(A, B);
        }
    }
}

int CountCritical()
{
    int res = 0;
    for(int i = 0; i < N; i++)
    {
        res += good[i];
    }
    return res;
}

Compilation message (stderr)

rings.cpp: In constructor 'disjoint_set::disjoint_set(int)':
rings.cpp:19:31: error: no match for 'operator=' (operand types are 'std::vector<short int>' and 'std::vector<int>')
   19 |         parent = vector<int>(S);
      |                               ^
In file included from /usr/include/c++/10/vector:72,
                 from rings.cpp:2:
/usr/include/c++/10/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const std::vector<short int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/10/vector:67,
                 from rings.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::vector<short int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::initializer_list<short int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
rings.cpp:20:32: error: no match for 'operator=' (operand types are 'std::vector<short int>' and 'std::vector<int>')
   20 |         subtree = vector<int>(S);
      |                                ^
In file included from /usr/include/c++/10/vector:72,
                 from rings.cpp:2:
/usr/include/c++/10/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const std::vector<short int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/10/vector:67,
                 from rings.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::vector<short int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = short int; _Alloc = std::allocator<short int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::initializer_list<short int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
rings.cpp: In function 'void Init(int)':
rings.cpp:72:45: error: no matching function for call to 'std::vector<std::vector<short int> >::push_back(std::vector<int>)'
   72 |         Z_degree.push_back(vector<int>(N, 0));
      |                                             ^
In file included from /usr/include/c++/10/vector:67,
                 from rings.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:1187:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::vector<short int>; _Alloc = std::allocator<std::vector<short int> >; std::vector<_Tp, _Alloc>::value_type = std::vector<short int>]'
 1187 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1187:35: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const value_type&' {aka 'const std::vector<short int>&'}
 1187 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:1203:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::vector<short int>; _Alloc = std::allocator<std::vector<short int> >; std::vector<_Tp, _Alloc>::value_type = std::vector<short int>]'
 1203 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1203:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::vector<std::vector<short int> >::value_type&&' {aka 'std::vector<short int>&&'}
 1203 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~