Compilare: user.cpp: In function ‘int main()’: user.cpp:18:23: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[3500500]’ [-Wformat=] fscanf(fin,"%s",&s); ^ user.cpp:15:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&k); ^ user.cpp:18:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",&s); ^