View Compilation Error

0_0_20138416_1386.cpp: In function 'void imain()':
0_0_20138416_1386.cpp:89:27: error: too few arguments to function 'void exit(int)'
      if(px<=0||px>N) exit();
                           ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/assert.h:17:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/cassert:43,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:33,
                 from 0_0_20138416_1386.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/stdlib.h:306:32: note: declared here
   void __cdecl __MINGW_NOTHROW exit(int _Code) __MINGW_ATTRIB_NORETURN;
                                ^