Compilare: main.cpp: In function 'int suma(std::vector<int>)': main.cpp:11:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v.size(); i++ ){ ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < posibilitati_2.size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < posibilitati_2.size(); j++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < posibilitati_4.size() && ok == 0; i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < posibilitati_2.size() && ok == 0; j++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~~