Compilare: main.cpp: In member function 'DigitFreq& DigitFreq::operator+=(const DigitFreq&)': main.cpp:57:5: warning: no return statement in function returning non-void [-Wreturn-type] 56 | freq[i] += oth.freq[i]; +++ |+ return *this; 57 | } | ^ main.cpp: In member function 'DigitFreq& DigitFreq::operator-=(const DigitFreq&)': main.cpp:62:5: warning: no return statement in function returning non-void [-Wreturn-type] 61 | freq[i] -= oth.freq[i]; +++ |+ return *this; 62 | } | ^ main.cpp: In function 'int BinSearch(DigitFreq&, std::vector<DigitFreq>&)': main.cpp:175:12: warning: 'idx' may be used uninitialized [-Wmaybe-uninitialized] 175 | return idx; | ^~~ main.cpp:163:41: note: 'idx' was declared here 163 | int st = 0, dr = (int)v.size() - 1, idx; | ^~~