Compilare: main.cpp: In function 'int dfs(int)': main.cpp:15:10: warning: no return statement in function returning non-void [-Wreturn-type] dfs(*it);} ^ main.cpp: In function 'int main()': main.cpp:80:11: warning: unused variable 'j' [-Wunused-variable] int m,k,i,j,s,y,x; ^ main.cpp:80:13: warning: unused variable 's' [-Wunused-variable] int m,k,i,j,s,y,x; ^ main.cpp:78:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("promo.in","r",stdin); ^ main.cpp:79:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("promo.out","w",stdout); ^ main.cpp:81:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&m,&k); ^ main.cpp:83:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^