Compilare: main.cpp: In function 'void dfs(int)': main.cpp:112:9: warning: unused variable 'i' [-Wunused-variable] int i , vecin; ^ main.cpp: In function 'void dfs2(int)': main.cpp:153:9: warning: unused variable 'i' [-Wunused-variable] int i , vecin; ^ main.cpp: In function 'int main()': main.cpp:177:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&p); ^ main.cpp:178:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (s , 400 , fin); ^