Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(i!=p) ^ main.cpp: In function 'int main()': main.cpp:43:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ main.cpp:45:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^