Compilare: user.cpp: In function ‘int main()’: user.cpp:46:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&T); ^ user.cpp:49:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&N); ^ user.cpp: In function ‘long long int getrad(long long int)’: user.cpp:16:16: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] mid=(st+dr)/2; ^ user.cpp: In function ‘int main()’: user.cpp:16:16: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:13:15: note: ‘st’ was declared here long long st,dr=X,mid,last=-1; ^