Submission #389293

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
389293	2021-04-14T02:21:55 Z	2qbingxuan	XOR Sum (info1cup17_xorsum)	C++14	Compilation error	0 ms	0 KB

xorsum

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#ifdef local
#define safe cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#define pary(a...) danb(#a, a)
#define debug(a...) qqbx(#a, a)
template <typename ...T> void qqbx(const char *s, T ...a) {
    int cnt = sizeof...(T);
    ((std::cerr << "\033[1;32m(" << s << ") = (") , ... , (std::cerr << a << (--cnt ? ", " : ")\033[0m\n")));
}
template <typename T> void danb(const char *s, T L, T R) {
    std::cerr << "\033[1;32m[ " << s << " ] = [ ";
    for (int f = 0; L != R; ++L)
        std::cerr << (f++ ? ", " : "") << *L;
    std::cerr << " ]\033[0m\n";
}
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#define pary(...) ((void)0)
#endif // local
#define all(v) begin(v),end(v)
#define pb emplace_back
using namespace std;
using ll = int64_t;
const int maxn = 1000025, LGC = 29;

struct TREE : vector<int> {
    int less_equal(int x) {
        return upper_bound(all(), x) - begin();
    }
    int greater(int x) {
        return end() - upper_bound(all(), x);
    }
    int calc(int U) {
        if (empty()) return 0;
        // return #(a[i] > b[j]) where b[i] = U - a[i]
        int ans = 0;
        for (int i = size()-1, j = 0; i >= 0; i--) {
            while (j < size() && *this[i] + *this[j] <= U) ++j;
            if (j > i)
                break;
            ans += i - j + 1 & 1;
        }
        return ans & 1;
    }
} pre[2];
int calc(TREE &a, TREE &b, int U) {
    if (a.empty() || b.empty()) return 0;
    int ans = 0;
    for (int i = a.size()-1, j = 0; i >= 0; i--) {
        while (j < b.size() && a[i] + b[j] <= U) ++j;
        ans += j & 1;
    }
    return ans & 1;
}
int a[maxn];
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];

    pre[0].reserve(n);
    pre[1].reserve(n);
    int ans = 0;
    for (int b = 0; b < LGC; b++) {
        int U = (1<<b) - 1;
        int parity = 0;
        pre[0].clear();
        pre[1].clear();
        sort(a, a+n, [U](int x, int y){ return (x & U) < (y & U); });
        /*
        for (int i = 0; i < n; i++) {
            int d = a[i] >> b & 1;
            pre[d].push_back(a[i] & U);
            parity += pre[!d].less_equal(~a[i] & U);
            parity += pre[d].greater(~a[i] & U);
        }
        */
        for (int i = 0; i < n; i++)
            pre[a[i] >> b & 1].pb(a[i] & U);
        parity += pre[0].calc(U);
        parity += pre[1].calc(U);
        parity += calc(pre[0], pre[1], U);
        debug(parity);
        parity &= 1;
        ans |= parity << b;
    }
    cout << ans << '\n';
}

Compilation message

xorsum.cpp: In member function 'int TREE::calc(int)':
xorsum.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                    ~~^~~~~~~~
xorsum.cpp:40:34: error: no match for 'operator*' (operand type is 'TREE')
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                  ^~~~~~~~
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:387:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const std::complex<_Tp>&)'
  387 |     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:387:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::complex<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:396:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const _Tp&)'
  396 |     operator*(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:396:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::complex<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:405:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const _Tp&, const std::complex<_Tp>&)'
  405 |     operator*(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:405:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const std::valarray<_Tp>&)'
 1187 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1187:1: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::valarray<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)'
 1187 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1187:1: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   'TREE' is not derived from 'const std::valarray<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const typename std::valarray<_Tp>::value_type&, const std::valarray<_Tp>&)'
 1187 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1187:1: note:   template argument deduction/substitution failed:
xorsum.cpp:40:41: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                         ^
xorsum.cpp:40:45: error: no match for 'operator*' (operand type is 'TREE')
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                             ^~~~~~~~
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:387:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const std::complex<_Tp>&)'
  387 |     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:387:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::complex<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:396:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const std::complex<_Tp>&, const _Tp&)'
  396 |     operator*(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:396:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::complex<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from xorsum.cpp:2:
/usr/include/c++/9/complex:405:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const _Tp&, const std::complex<_Tp>&)'
  405 |     operator*(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:405:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   candidate expects 2 arguments, 1 provided
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const std::valarray<_Tp>&)'
 1187 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1187:1: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from 'const std::valarray<_Tp>'
   40 |             while (j < size() && *this[i] + *this[j] <= U) ++j;
      |                                                    ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from xorsum.cpp:2:
/usr/include/c++/9/valarray:1187:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)'
 1187 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1187:1: note:   template argument deduction/substitution failed:
xorsum.cpp:40:52: note:   'TREE' is not derived from