Compilare: user.cpp: In function ‘bool merg(long long int)’: user.cpp:25:16: warning: variable ‘gr3’ set but not used [-Wunused-but-set-variable] long long gr1,gr3; ^ user.cpp: In function ‘int main()’: user.cpp:72:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&k,&p); ^ user.cpp:78:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&v[i]); ^