Compilare: user.cpp: In function ‘int bs(int)’: user.cpp:61:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[m] >= a) ^ user.cpp: In function ‘void read_solve()’: user.cpp:60:15: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] m = (s+d) / 2; ^ user.cpp:57:6: note: ‘s’ was declared here int s, d, m; ^ user.cpp: In function ‘int bs(int)’: user.cpp:60:15: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] m = (s+d) / 2; ^