Compilare: user.cpp: In function ‘void read(int)’: user.cpp:12:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.cpp: In function ‘int main()’: user.cpp:33:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp: In function ‘void solve(int)’: user.cpp:27:30: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<smax<<' '<<st<<' '<<dr; ^ user.cpp:27:19: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<smax<<' '<<st<<' '<<dr; ^