Language: C++

// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
template <class Int> auto constexpr inf = numeric_limits<Int>::max()/2-1;
auto constexpr INF32 = inf<int32_t>;
auto constexpr INF64 = inf<int64_t>;
auto constexpr INF   = inf<int>;
#ifdef LOCAL
#include "debug.hpp"
#define dump(...) cerr << "[" << setw(3) << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl
#define debug if (1)
#else
#define dump(...) (void)(0)
#define say(x) (void)(0)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
template <class C, class T> int lbd(C const& v, T const& x) {
    return lower_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class T> int ubd(C const& v, T const& x) {
    return upper_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class F> int ppt(C const& v, F f) {
    return partition_point(v.begin(), v.end(), f)-v.begin();
}
// <<<

int32_t main() {
    int n,k; cin >> n >> k;
    vector<int> a(n),b(n);
    rep (i,n) cin >> a[i] >> b[i];

    auto f = [&](int mask) {
        int sum = 0;
        rep (i,n) if ((mask&a[i]) == a[i]) sum += b[i];
        return sum;
    };

    int ma = 0;
    chmax(ma, f(k));
    rep (i,32) if (k>>i&1) {
        int mask = k^(1LL<<i);
        mask |= (1LL<<i)-1;
        chmax(ma, f(mask));
    }
    cout << ma << endl;
}
// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
template <class Int> auto constexpr inf = numeric_limits<Int>::max()/2-1;
auto constexpr INF32 = inf<int32_t>;
auto constexpr INF64 = inf<int64_t>;
auto constexpr INF   = inf<int>;
#ifdef LOCAL
#include "debug.hpp"
#define dump(...) cerr << "[" << setw(3) << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl
#define debug if (1)
#else
#define dump(...) (void)(0)
#define say(x) (void)(0)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
template <class C, class T> int lbd(C const& v, T const& x) {
    return lower_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class T> int ubd(C const& v, T const& x) {
    return upper_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class F> int ppt(C const& v, F f) {
    return partition_point(v.begin(), v.end(), f)-v.begin();
}
// <<<

int32_t main() {
    int n,k; cin >> n >> k;
    vector<int> a(n),b(n);
    rep (i,n) cin >> a[i] >> b[i];

    auto f = [&](int mask) {
        int sum = 0;
        rep (i,n) if ((mask&a[i]) == a[i]) sum += b[i];
        return sum;
    };

    int ma = 0;
    chmax(ma, f(k));
    rep (i,32) if (k>>i&1) {
        int mask = k^(1LL<<i);
        mask |= (1LL<<i)-1;
        chmax(ma, f(mask));
    }
    cout << ma << endl;
}


Compiler output:
a.cc:104:12: error: 'long' specified with 'ld' {aka 'long double'}
  104 | using ld = long double;
      |            ^~~~
a.cc:124:37: error: redefinition of 'template<class Int> constexpr const auto inf'
  124 | template <class Int> auto constexpr inf = numeric_limits<Int>::max()/2-1;
      |                                     ^~~
a.cc:25:37: note: 'template<class Int> constexpr const auto inf<Int>' previously declared here
   25 | template <class Int> auto constexpr inf = numeric_limits<Int>::max()/2-1;
      |                                     ^~~
a.cc:125:16: error: conflicting declaration 'constexpr const auto INF32'
  125 | auto constexpr INF32 = inf<int32_t>;
      |                ^~~~~
a.cc:26:16: note: previous declaration as 'constexpr const int INF32'
   26 | auto constexpr INF32 = inf<int32_t>;
      |                ^~~~~
a.cc:126:16: error: conflicting declaration 'constexpr const auto INF64'
  126 | auto constexpr INF64 = inf<int64_t>;
      |                ^~~~~
a.cc:27:16: note: previous declaration as 'constexpr const long int INF64'
   27 | auto constexpr INF64 = inf<int64_t>;
      |                ^~~~~
a.cc:127:16: error: conflicting declaration 'constexpr const auto INF'
  127 | auto constexpr INF   = inf<int>;
      |                ^~~
a.cc:28:16: note: previous declaration as 'constexpr const long long int INF'
   28 | auto constexpr INF   = inf<int>;
      |                ^~~
a.cc:141:10: error: redefinition of 'template<class T, class, class> std::ostream& operator<<(std::ostream&, const T&)'
  141 | ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
      |          ^~~~~~~~
a.cc:42:10: note: 'template<class T, class, class> std::ostream& operator<<(std::ostream&, const T&)' previously declared here
   42 | ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
      |          ^~~~~~~~
a.cc:143:10: error: redefinition of 'template<class T, class, class> std::istream& operator>>(std::istream&, T&)'
  143 | istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
      |          ^~~~~~~~
a.cc:44:10: note: 'template<class T, class, class> std::istream& operator>>(std::istream&, T&)' previously declared here
   44 | istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
      |          ^~~~~~~~
a.cc:144:38: error: redefinition of 'template<class T, class S> std::ostream& operator<<(std::ostream&, const std::pair<_T1, _T2>&)'
  144 | template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
      |                                      ^~~~~~~~
a.cc:45:38: note: 'template<class T, class S> std::ostream& operator<<(std::ostream&, const std::pair<_T1, _T2>&)' previously declared here
   45 | template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
      |                                      ^~~~~~~~
a.cc:145:38: error: redefinition of 'template<class T, class S> std::istream& operator>>(std::istream&, std::pair<_T1, _T2>&)'
  145 | template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
      |                                      ^~~~~~~~
a.cc:46:38: note: 'template<class T, class S> std::istream& operator>>(std::istream&, std::pair<_T1, _T2>&)' previously declared here
   46 | template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
      |                                      ^~~~~~~~
a.cc:146:8: error: redefinition of 'struct IOSetup'
  146 | struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
      |        ^~~~~~~
a.cc:47:8: note: previous definition of 'struct IOSetup'
   47 | struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
      |        ^~~~~~~
a.cc:146:116: error: conflicting declaration 'int iosetup'
  146 | struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
      |                                                                                                                    ^~~~~~~
a.cc:47:116: note: previous declaration as 'IOSetup iosetup'
   47 | struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
      |                                                                                                                    ^~~~~~~
a.cc:147:27: error: redefinition of 'struct FixPoint<F>'
  147 | template <class F> struct FixPoint : private F {
      |                           ^~~~~~~~
a.cc:48:27: note: previous definition of 'struct FixPoint<F>'
   48 | template <class F> struct FixPoint : private F {
      |                           ^~~~~~~~
a.cc:151:8: error: redefinition of 'struct MakeFixPoint'
  151 | struct MakeFixPoint {
      |        ^~~~~~~~~~~~
a.cc:52:8: note: previous definition of 'struct MakeFixPoint'
   52 | struct MakeFixPoint {
      |        ^~~~~~~~~~~~
a.cc:156:37: error: redefinition of 'struct vec_impl<T, d>'
  156 | template <class T, size_t d> struct vec_impl {
      |                                     ^~~~~~~~
a.cc:57:37: note: previous definition of 'struct vec_impl<T, d>'
   57 | template <class T, size_t d> struct vec_impl {
      |                                     ^~~~~~~~
a.cc:160:27: error: redefinition of 'struct vec_impl<T, 0>'
  160 | template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
      |                           ^~~~~~~~~~~~~
a.cc:61:27: note: previous definition of 'struct vec_impl<T, 0>'
   61 | template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
      |                           ^~~~~~~~~~~~~
a.cc:162:54: error: redefinition of 'template<class T, long unsigned int d, class ... Args> auto make_v(Args&& ...)'
  162 | template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
      |                                                      ^~~~~~
a.cc:63:54: note: 'template<class T, long unsigned int d, class ... Args> auto make_v(Args&& ...)' previously declared here
   63 | template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
      |                                                      ^~~~~~
a.cc:163:25: error: redefinition of 'template<class T> void quit(const T&)'
  163 | template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
      |                         ^~~~
a.cc:64:25: note: 'template<class T> void quit(const T&)' previously declared here
   64 | template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
      |                         ^~~~
a.cc:164:44: error: redefinition of 'template<class T, class U> constexpr bool chmin(T&, const U&)'
  164 | template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
      |                                            ^~~~~
a.cc:65:44: note: 'template<class T, class U> constexpr bool chmin(T&, const U&)' previously declared here
   65 | template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
      |                                            ^~~~~
a.cc:165:44: error: redefinition of 'template<class T, class U> constexpr bool chmax(T&, const U&)'
  165 | template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
      |                                            ^~~~~
a.cc:66:44: note: 'template<class T, class U> constexpr bool chmax(T&, const U&)' previously declared here
   66 | template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
      |                                            ^~~~~
a.cc:166:36: error: redefinition of 'template<class It> constexpr auto sumof(It, It)'
  166 | template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
      |                                    ^~~~~
a.cc:67:36: note: 'template<class It> constexpr auto sumof(It, It)' previously declared here
   67 | template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
      |                                    ^~~~~
a.cc:167:24: error: redefinition of 'template<class T> ll sz(const T&)'
  167 | template <class T> int sz(T const& x) { return x.size(); }
      |                        ^~
a.cc:68:24: note: 'template<class T> ll sz(const T&)' previously declared here
   68 | template <class T> int sz(T const& x) { return x.size(); }
      |                        ^~
a.cc:168:33: error: redefinition of 'template<class C, class T> ll lbd(const C&, const T&)'
  168 | template <class C, class T> int lbd(C const& v, T const& x) {
      |                                 ^~~
a.cc:69:33: note: 'template<class C, class T> ll lbd(const C&, const T&)' previously declared here
   69 | template <class C, class T> int lbd(C const& v, T const& x) {
      |                                 ^~~
a.cc:171:33: error: redefinition of 'template<class C, class T> ll ubd(const C&, const T&)'
  171 | template <class C, class T> int ubd(C const& v, T const& x) {
      |                                 ^~~
a.cc:72:33: note: 'template<class C, class T> ll ubd(const C&, const T&)' previously declared here
   72 | template <class C, class T> int ubd(C const& v, T const& x) {
      |                                 ^~~
a.cc:174:33: error: redefinition of 'template<class C, class F> ll ppt(const C&, F)'
  174 | template <