Compilare: main.cpp: In member function 'void lcaSqrt::display()': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i < graph.size(); i++ ){ ~~^~~~~~~~~~~~~~ main.cpp:30:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < graph[i].size(); j++ ){ ~~^~~~~~~~~~~~~~~~~ main.cpp:28:10: warning: unused variable 'i' [-Wunused-variable] int i, j; ^ main.cpp:28:14: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp: In member function 'void lcaSqrt::dfs(int, int, int, int)': main.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < graph[nod].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:8: warning: unused variable 'nod' [-Wunused-variable] int x, nod, y, n, m; ^~~