Compilare: main.cpp: In function 'void dfs(int)': main.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < graph[node].size ( ); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:15: warning: unused variable 'x' [-Wunused-variable] { int n, i, x, y, j, k; ^ main.cpp:41:18: warning: unused variable 'y' [-Wunused-variable] { int n, i, x, y, j, k; ^