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View Compilation Error

0_0_23816855_9924.cpp: In function 'void work()':
0_0_23816855_9924.cpp:50:17: error: invalid conversion from 'std::vector<std::pair<long long int, int> >*' to 'std::vector<std::pair<long long int, int> >::size_type {aka long long unsigned int}' [-fpermissive]
   vector<Pair>(a).swap(a);
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/random.h:34,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:49,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_23816855_9924.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:277:7: note: initializing argument 1 of 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>::size_type, const allocator_type&) [with _Tp = std::pair<long long int, int>; _Alloc = std::allocator<std::pair<long long int, int> >; std::vector<_Tp, _Alloc>::size_type = long long unsigned int; std::vector<_Tp, _Alloc>::allocator_type = std::allocator<std::pair<long long int, int> >]'
       vector(size_type __n, const allocator_type& __a = allocator_type())
       ^
0_0_23816855_9924.cpp:50:25: error: no matching function for call to 'std::vector<std::pair<long long int, int> >::swap(std::vector<std::pair<long long int, int> > [2])'
   vector<Pair>(a).swap(a);
                         ^
0_0_23816855_9924.cpp:50:25: note: candidate is:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/random.h:34,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:49,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_23816855_9924.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:1194:7: note: void std::vector<_Tp, _Alloc>::swap(std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, int>; _Alloc = std::allocator<std::pair<long long int, int> >]
       swap(vector& __x)
       ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:1194:7: note:   no known conversion for argument 1 from 'std::vector<std::pair<long long int, int> > [2]' to 'std::vector<std::pair<long long int, int> >&'
0_0_23816855_9924.cpp:57:27: error: invalid conversion from 'std::vector<std::pair<long long int, long long int> >*' to 'std::vector<std::pair<long long int, long long int> >::size_type {aka long long unsigned int}' [-fpermissive]
   vector<pair<ll,ll> >(pnt).swap(pnt);
                           ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/random.h:34,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:49,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_23816855_9924.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:277:7: note: initializing argument 1 of 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>::size_type, const allocator_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::vector<_Tp, _Alloc>::size_type = long long unsigned int; std::vector<_Tp, _Alloc>::allocator_type = std::allocator<std::pair<long long int, long long int> >]'
       vector(size_type __n, const allocator_type& __a = allocator_type())
       ^
0_0_23816855_9924.cpp:57:37: error: no matching function for call to 'std::vector<std::pair<long long int, long long int> >::swap(std::vector<std::pair<long long int, long long int> > [2])'
   vector<pair<ll,ll> >(pnt).swap(pnt);
                                     ^
0_0_23816855_9924.cpp:57:37: note: candidate is:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/random.h:34,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:49,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_23816855_9924.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:1194:7: note: void std::vector<_Tp, _Alloc>::swap(std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]
       swap(vector& __x)
       ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:1194:7: note:   no known conversion for argument 1 from 'std::vector<std::pair<long long int, long long int> > [2]' to 'std::vector<std::pair<long long int, long long int> >&'


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