Compilare: main.cpp: In function 'void DFS(int)': main.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int nod =0;nod<v[x].size();nod++) ~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:24: warning: unused variable 'j' [-Wunused-variable] int n, m, x, y, i, j; ^ main.cpp:34:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ main.cpp:38:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^