Submission #1160864

#	Time	Username	Problem	Language	Result	Execution time	Memory
1160864		JahonaliX	Game (IOI14_game)	C++20	Compilation error	0 ms	0 KiB

game

#include <bits/stdc++.h>

using namespace std;

struct dsu {
    int n;
    vector<int> p, c;
    dsu() {}
    dsu(int m) {
        n = m;
        p.assign(n, 0);
        c.assign(n, 1);
        iota(p.begin(), p.end(), 0);
    }
    int find(int x) {
        if (x == p[x]) return x;
        return p[x] = find(p[x]);
    }
    void merge(int a, int b) {
        p[b] = a;
        c[a] += c[b];
    }
};

int n;
dsu d;
vector<vector<bool>> v;

void initialize(int N) { n = N, d = dsu(n), v.assign(n, vector<bool>(n)); }

int hasEdge(int u, int v)  {
    u = d.find(u);
    v = d.find(v);
    v[u][v] = true;
    if (u == v) return 1;
    vector<int> a, b;
    for (int i = 0; i < n; ++i) {
        if (d.find(i) == u) a.emplace_back(i);
        if (d.find(i) == v) b.emplace_back(i);
    }
    for (int i : a) for (int j : b) if (!v[i][j]) return 0;
    merge(u, v);
    return 1;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:34:6: error: invalid types 'int[int]' for array subscript
   34 |     v[u][v] = true;
      |      ^
game.cpp:41:43: error: invalid types 'int[int]' for array subscript
   41 |     for (int i : a) for (int j : b) if (!v[i][j]) return 0;
      |                                           ^
game.cpp:42:10: error: no matching function for call to 'merge(int&, int&)'
   42 |     merge(u, v);
      |     ~~~~~^~~~~~
In file included from /usr/include/c++/11/string:52,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from game.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:4927:5: note: candidate: 'template<class _IIter1, class _IIter2, class _OIter> constexpr _OIter std::merge(_IIter1, _IIter1, _IIter2, _IIter2, _OIter)'
 4927 |     merge(_InputIterator1 __first1, _InputIterator1 __last1,
      |     ^~~~~
/usr/include/c++/11/bits/stl_algo.h:4927:5: note:   template argument deduction/substitution failed:
game.cpp:42:10: note:   candidate expects 5 arguments, 2 provided
   42 |     merge(u, v);
      |     ~~~~~^~~~~~
In file included from /usr/include/c++/11/string:52,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from game.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:4978:5: note: candidate: 'template<class _IIter1, class _IIter2, class _OIter, class _Compare> constexpr _OIter std::merge(_IIter1, _IIter1, _IIter2, _IIter2, _OIter, _Compare)'
 4978 |     merge(_InputIterator1 __first1, _InputIterator1 __last1,
      |     ^~~~~
/usr/include/c++/11/bits/stl_algo.h:4978:5: note:   template argument deduction/substitution failed:
game.cpp:42:10: note:   candidate expects 6 arguments, 2 provided
   42 |     merge(u, v);
      |     ~~~~~^~~~~~
In file included from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from game.cpp:1:
/usr/include/c++/11/pstl/glue_algorithm_defs.h:412:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _ForwardIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> std::merge(_ExecutionPolicy&&, _ForwardIterator1, _ForwardIterator1, _ForwardIterator2, _ForwardIterator2, _ForwardIterator, _Compare)'
  412 | merge(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2,
      | ^~~~~
/usr/include/c++/11/pstl/glue_algorithm_defs.h:412:1: note:   template argument deduction/substitution failed:
game.cpp:42:10: note:   candidate expects 7 arguments, 2 provided
   42 |     merge(u, v);
      |     ~~~~~^~~~~~
In file included from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from game.cpp:1:
/usr/include/c++/11/pstl/glue_algorithm_defs.h:417:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _ForwardIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> std::merge(_ExecutionPolicy&&, _ForwardIterator1, _ForwardIterator1, _ForwardIterator2, _ForwardIterator2, _ForwardIterator)'
  417 | merge(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2,
      | ^~~~~
/usr/include/c++/11/pstl/glue_algorithm_defs.h:417:1: note:   template argument deduction/substitution failed:
game.cpp:42:10: note:   candidate expects 6 arguments, 2 provided
   42 |     merge(u, v);
      |     ~~~~~^~~~~~