Compilare: user.c: In function ‘sol’: user.c:41: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.c:41: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.c: In function ‘main’: user.c:69: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:71: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result