Compilare: user.cpp: In function ‘void solve_aib()’: user.cpp:21: warning: unused variable ‘j’ user.cpp: In function ‘int solve_n2()’: user.cpp:67: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:71: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int solve_n2()’: user.cpp:51: warning: ‘imax’ may be used uninitialized in this function user.cpp: In function ‘void solve_aib()’: user.cpp:21: warning: ‘imax’ may be used uninitialized in this function