Compilare: user.cpp: In function ‘int main()’: user.cpp:10:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%ld%ld", &n, &k); ^ user.cpp:14:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%ld", &v[i]); ^ user.cpp:22:24: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] long mij = (st + dr) / 2; ^ user.cpp:21:15: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (st + 1 < dr) { ^