Compilare: main.cpp: In function 'bool Cuplaj(int)': main.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[k].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[k].size(); i++) ~~^~~~~~~~~~~~~