Compilare: main.cpp: In function 'int Hash_check(int)': main.cpp:41:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Hash[modd].size(); ++i ) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int DFS(int)': main.cpp:57:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Topo_sort(int)': main.cpp:86:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:188:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Zone.size(); ++i ) ~~^~~~~~~~~~~~~ main.cpp:189:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Zone.size(); ++j ) ~~^~~~~~~~~~~~~ main.cpp:201:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Zone.size(); ++i ) ~~^~~~~~~~~~~~~ main.cpp:214:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Zone.size(); ++i ) ~~^~~~~~~~~~~~~ main.cpp:218:22: warning: 'gata' may be used uninitialized in this function [-Wmaybe-uninitialized] Print( i, gata ); ^