Compilare: main.cpp: In function 'bool exista_dreptunghi(int)': main.cpp:103:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) ~^~~~~~~~~ main.cpp:105:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<b.size(); j++) ~^~~~~~~~~ main.cpp:115:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size() && !gasit; i++) ~^~~~~~~~~ main.cpp:123:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) ~^~~~~~~~~ main.cpp:127:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.size(); i++) ~^~~~~~~~~