Compilare: user.cpp: In function ‘void dfs(int, int, int, int)’: user.cpp:115:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[nod][i]>0 && viz[i]<mark) ^ user.cpp: In function ‘int main()’: user.cpp:206:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:206:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void read(int&, int&)’: user.cpp:19:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:37:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^