Compilare: main.cpp: In function 'void Topo(int)': main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Dfs(int)': main.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Adrev[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( C[curr_comp].size() > szmax ) { ~~~~~~~~~~~~~~~~~~~~^~~~~~~