Compilare: user.cpp: In function ‘int main()’: user.cpp:40:31: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long long int’ [-Wformat=] fprintf(OUT,"%d %d",cost,comb); ^ user.cpp:21:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:23:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&v[i]); ^