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View Compilation Error

0_0_37471898_7668.cpp: In function 'void slove()':
0_0_37471898_7668.cpp:44:19: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
         printf(ans);
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/locale.h:12:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/clocale:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:40,
                 from 0_0_37471898_7668.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:378:15: note: initializing argument 1 of 'int printf(const char*, ...)'
   int __cdecl printf(const char * __restrict__ _Format,...);
               ^
0_0_37471898_7668.cpp:47:18: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
         printf(-1);
                  ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/locale.h:12:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/clocale:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:40,
                 from 0_0_37471898_7668.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:378:15: note: initializing argument 1 of 'int printf(const char*, ...)'
   int __cdecl printf(const char * __restrict__ _Format,...);
               ^


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