Compilare: user.c: In function ‘main’: user.c:13: warning: format ‘%li’ expects type ‘long int’, but argument 2 has type ‘long long int’ user.c:36: warning: format ‘%li’ expects type ‘long int’, but argument 2 has type ‘int’ user.c:46: warning: format ‘%li’ expects type ‘long int’, but argument 2 has type ‘int’ user.c:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result