Compilare: main.cpp: In function 'void Pre()': main.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edg.size(); ++i ) { ~~^~~~~~~~~~~~ main.cpp:47:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:51:22: warning: array subscript has type 'char' [-Wchar-subscripts] node[ aux[i] ] = nrN; ^ main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:57:22: warning: array subscript has type 'char' [-Wchar-subscripts] node[ aux[i] ] = nrN; ^ main.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edg.size(); ++i ) { ~~^~~~~~~~~~~~ main.cpp:69:18: warning: array subscript has type 'char' [-Wchar-subscripts] Ad[ node[a] ].push_back( node[b] ); ^ main.cpp:69:39: warning: array subscript has type 'char' [-Wchar-subscripts] Ad[ node[a] ].push_back( node[b] ); ^ main.cpp: In function 'void Topo(int)': main.cpp:77:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Remake(int, int, int)': main.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:108:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Ad[nod].size(); ++j ) ~~^~~~~~~~~~~~~~~~ main.cpp:119:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < topo.size(); ++i ) { ~~^~~~~~~~~~~~~ main.cpp:122:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Ad[nod].size(); ++j ) ~~^~~~~~~~~~~~~~~~ main.cpp:134:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i < _SOL.size(); ++i ) ~~^~~~~~~~~~~~~