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View Compilation Error

0_0_29936754_3024.cpp: In function 'void GaleShapley()':
0_0_29936754_3024.cpp:19:30: error: reference to 'rank' is ambiguous
   for(int j = 0; j < n; ++j) rank[i][w_love[i][j]] = j; 
                              ^
0_0_29936754_3024.cpp:13:5: note: candidates are: int rank [30][30]
 int rank[maxn][maxn];     // rank[i][j]: 男孩 j 在女孩 i 心中的的排名
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/move.h:57:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:59,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_29936754_3024.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_29936754_3024.cpp:30:16: error: reference to 'rank' is ambiguous
    if(m == -1||rank[w][i] < rank[w][m]){ // 相比现男友,女孩更喜欢男孩 i 
                ^
0_0_29936754_3024.cpp:13:5: note: candidates are: int rank [30][30]
 int rank[maxn][maxn];     // rank[i][j]: 男孩 j 在女孩 i 心中的的排名
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/move.h:57:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:59,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_29936754_3024.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_29936754_3024.cpp:30:29: error: reference to 'rank' is ambiguous
    if(m == -1||rank[w][i] < rank[w][m]){ // 相比现男友,女孩更喜欢男孩 i 
                             ^
0_0_29936754_3024.cpp:13:5: note: candidates are: int rank [30][30]
 int rank[maxn][maxn];     // rank[i][j]: 男孩 j 在女孩 i 心中的的排名
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/move.h:57:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:59,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_29936754_3024.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^


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