Compilare: main.cpp: In function 'int sum(std::vector<int>)': main.cpp:11:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++ ){ ~~^~~~~~~~~~ main.cpp: In function 'void afisare(std::vector<int>)': main.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v.size(); i++ ){ ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> concatenare(std::vector<int>, std::vector<int>)': main.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=0; i < y.size(); i++ ){ ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v.size(); i ++ ){ ~~^~~~~~~~~~ main.cpp:44:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < v.size(); j++ ){ ~~^~~~~~~~~~ main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < suma1.size(); i ++ ){ ~~^~~~~~~~~~~~~~ main.cpp:54:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < suma1.size(); j++ ){ ~~^~~~~~~~~~~~~~ main.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < suma2.size() && ok == 0; i ++ ){ ~~^~~~~~~~~~~~~~ main.cpp:62:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < suma1.size() && ok == 0; j++ ){ ~~^~~~~~~~~~~~~~