Compilare: main.cpp: In function 'bool compare(std::vector<int>, std::vector<int>)': main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < a.size ( ); i++ ){ ~~^~~~~~~~~~~~ main.cpp: In function 'std::vector<int> operator-(std::vector<int>, std::vector<int>)': main.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < x.size ( ); i++ ){ ~~^~~~~~~~~~~~ main.cpp:43:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < y.size ( ) ){ ~~^~~~~~~~~~~~ main.cpp: In function 'void afisare(std::vector<int>)': main.cpp:74:13: warning: unused variable 'num' [-Wunused-variable] int num = a[i]; ^~~ main.cpp: In function 'std::vector<int> impart(std::vector<int>, int)': main.cpp:85:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < a.size ( ); i++ ){ ~~^~~~~~~~~~~~ main.cpp:92:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( a[i] == power - 1 && i < a.size ( ) ){ ~~^~~~~~~~~~~~ main.cpp:96:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < a.size ( ) ) ~~^~~~~~~~~~~~