Compilare: main.cpp: In function 'int main()': main.cpp:58:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < add.size(); ++i) { ~~^~~~~~~~~~~~ main.cpp:67:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < rem.size(); ++j) { ~~^~~~~~~~~~~~ main.cpp:80:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < add.size(); ++j) { ~~^~~~~~~~~~~~