Compilare: main.cpp: In function 'int main()': main.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vec1.size(); i++) ~^~~~~~~~~~~~ main.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<vec1.size(); j++) ~^~~~~~~~~~~~ main.cpp:68:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vec2.size(); i++) ~^~~~~~~~~~~~ main.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<vec2.size(); j++) ~^~~~~~~~~~~~ main.cpp:77:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vec1.size(); i++) ~^~~~~~~~~~~~ main.cpp:78:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<vec2.size(); j++){ ~^~~~~~~~~~~~