Compilare: main.cpp: In function 'void DFS1(int)': main.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L1[k].size(); i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void DFS2(int)': main.cpp:50:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L2[k].size(); i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void afisare()': main.cpp:93:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l=0; l<sol.size(); l++) ~^~~~~~~~~~~ main.cpp:95:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l2=0; l2<sol[l].size(); l2++) ~~^~~~~~~~~~~~~~