Submission #1051094

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051094		sofijavelkovska	Stranded Far From Home (BOI22_island)	C++17	Compilation error	0 ms	0 KiB

island

#include <bits/stdc++.h>
using namespace std;

const int MAXN=2e5, INF=2e9;

int n, m;
int a[MAXN];
vector<int> adj[MAXN];
int link[MAXN], size[MAXN], index[MAXN];
long long sum[MAXN];
set<pair<int, int> > neighbours[MAXN];

bool compare(int x, int y)
{
    return a[x]<a[y];
}

int find(int x)
{
    if (x==link[x])
        return x;

    return link[x]=find(link[x]);
}

void unite(int x, int y, int maxvalue)
{
    x=find(x);
    y=find(y);
    if (neighbours[index[x]].size()<neighbours[index[y]].size())
        swap(x, y);
    for (auto t : neighbours[index[y]])
        if (t.first>maxvalue)
            neighbours[index[x]].insert(t);
    neighbours[index[y]].clear();
    index[y]=index[x];
    if (size[x]<size[y])
        swap(x, y);
    size[x]=size[x]+size[y];
    sum[x]=sum[x]+sum[y];
    link[y]=x;

    return;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m;
    for (int i=0; i<n; i++)
        cin >> a[i];
    for (int i=0; i<m; i++)
    {
        int x, y;
        cin >> x >> y;
        adj[x-1].push_back(y-1);
        adj[y-1].push_back(x-1);
    }
    int sorted[n];
    for (int i=0; i<n; i++)
        sorted[i]=i;
    sort(sorted, sorted+n, compare);
    for (int i=0; i<n; i++)
    {
        link[i]=i;
        size[i]=1;
        sum[i]=a[i];
        index[i]=i;
        for (auto x : adj[i])
            neighbours[i].insert({a[x], x});
    }
    map<int, vector<int> > byvalue;
    for (int i=0; i<n; i++)
        byvalue[a[i]].push_back(i);
    bool possible[n];
    for (int i=0; i<n; i++)
        possible[i]=true;
    queue<int> q;
    vector<int> todelete[n];
    for (auto k : byvalue)
    {
        for (auto x : k.second)
        {
            for (auto y : adj[x])
                if (a[y]<=a[x] && find(x)!=find(y))
                    unite(x, y, a[x]);
        }
        for (auto x : k.second)
        {
            int leader=find(x);
            while (!neighbours[index[leader]].empty() && (*neighbours[index[leader]].begin()).first<=a[x])
                neighbours[index[leader]].erase(neighbours[index[leader]].begin());
            if (neighbours[index[leader]].empty())
                continue;
            auto it=neighbours[index[leader]].begin();
            if (sum[leader]>=(*it).first)
            {
                todelete[(*it).second].push_back(x);
                continue;
            }
            possible[x]=false;
            q.push(x);
            while (!q.empty())
            {
                int y=q.front();
                q.pop();
                for (auto t : todelete[y])
                    if (a[t]<=a[x] && possible[t])
                    {
                        possible[t]=false;
                        q.push(t);
                    }
            }
        }
    }
    for (int i=0; i<n; i++)
        cout << possible[i];

    return 0;
}

Compilation message (stderr)

island.cpp:9:39: error: 'int index [200000]' redeclared as different kind of entity
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                                       ^
In file included from /usr/include/string.h:432,
                 from /usr/include/c++/10/cstring:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:48,
                 from island.cpp:1:
/usr/include/strings.h:61:1: note: previous declaration 'const char* index(const char*, int)'
   61 | index (const char *__s, int __c) __THROW
      | ^~~~~
island.cpp: In function 'void unite(int, int, int)':
island.cpp:30:25: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   30 |     if (neighbours[index[x]].size()<neighbours[index[y]].size())
      |                         ^
island.cpp:30:53: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   30 |     if (neighbours[index[x]].size()<neighbours[index[y]].size())
      |                                                     ^
island.cpp:32:35: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   32 |     for (auto t : neighbours[index[y]])
      |                                   ^
island.cpp:34:29: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   34 |             neighbours[index[x]].insert(t);
      |                             ^
island.cpp:35:21: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   35 |     neighbours[index[y]].clear();
      |                     ^
island.cpp:36:10: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   36 |     index[y]=index[x];
      |          ^
island.cpp:36:19: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   36 |     index[y]=index[x];
      |                   ^
island.cpp:37:9: error: reference to 'size' is ambiguous
   37 |     if (size[x]<size[y])
      |         ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp:37:17: error: reference to 'size' is ambiguous
   37 |     if (size[x]<size[y])
      |                 ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp:39:5: error: reference to 'size' is ambiguous
   39 |     size[x]=size[x]+size[y];
      |     ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp:39:13: error: reference to 'size' is ambiguous
   39 |     size[x]=size[x]+size[y];
      |             ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp:39:21: error: reference to 'size' is ambiguous
   39 |     size[x]=size[x]+size[y];
      |                     ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp: In function 'int main()':
island.cpp:68:9: error: reference to 'size' is ambiguous
   68 |         size[i]=1;
      |         ^~~~
In file included from /usr/include/c++/10/string:54,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from island.cpp:1:
/usr/include/c++/10/bits/range_access.h:254:5: note: candidates are: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  254 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/10/bits/range_access.h:245:5: note:                 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  245 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
island.cpp:9:17: note:                 'int size [200000]'
    9 | int link[MAXN], size[MAXN], index[MAXN];
      |                 ^~~~
island.cpp:70:14: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   70 |         index[i]=i;
      |              ^
island.cpp:93:37: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   93 |             while (!neighbours[index[leader]].empty() && (*neighbours[index[leader]].begin()).first<=a[x])
      |                                     ^
island.cpp:93:76: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   93 |             while (!neighbours[index[leader]].empty() && (*neighbours[index[leader]].begin()).first<=a[x])
      |                                                                            ^
island.cpp:94:33: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   94 |                 neighbours[index[leader]].erase(neighbours[index[leader]].begin());
      |                                 ^
island.cpp:94:65: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   94 |                 neighbours[index[leader]].erase(neighbours[index[leader]].begin());
      |                                                                 ^
island.cpp:95:33: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   95 |             if (neighbours[index[leader]].empty())
      |                                 ^
island.cpp:97:37: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   97 |             auto it=neighbours[index[leader]].begin();
      |                                     ^