Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:27:13: warning: unused variable ‘nod’ [-Wunused-variable] int i,y,nod; ^ user.cpp: In function ‘int main()’: user.cpp:75:9: warning: unused variable ‘ant’ [-Wunused-variable] int ant; ^ user.cpp:62:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&n,&m); ^ user.cpp:66:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&l[i]); ^ user.cpp:69:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&a); ^ user.cpp:78:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d%d",&a,&b,&t); ^