Compilare: user.cpp:14:23: warning: integer overflow in expression [-Woverflow] long long Min=(1<<31)-1; ^ user.cpp: In function ‘void precalcNext()’: user.cpp:37:9: warning: unused variable ‘dx’ [-Wunused-variable] int dx=0,dy=1; ^ user.cpp:37:14: warning: unused variable ‘dy’ [-Wunused-variable] int dx=0,dy=1; ^ user.cpp: In function ‘void Back(int)’: user.cpp:147:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Power[k].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:175:9: warning: variable ‘multiple’ set but not used [-Wunused-but-set-variable] int multiple; ^