Compilare: main.cpp: In function 'per calc(std::vector<int>, std::vector<int>)': main.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i==a.v.size() && j==b.v.size()) break; ~^~~~~~~~~~~~ main.cpp:26:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i==a.v.size() && j==b.v.size()) break; ~^~~~~~~~~~~~ main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i==a.v.size()){ ~^~~~~~~~~~~~ main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (j==b.v.size()){ ~^~~~~~~~~~~~