Compilare: user.c: In function ‘read’: user.c:17: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘solve’: user.c:50: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.c:50: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long long int’ user.c:50: warning: format ‘%d’ expects type ‘int’, but argument 5 has type ‘long long int’ user.c:24: warning: ‘a’ may be used uninitialized in this function user.c:24: warning: ‘b’ may be used uninitialized in this function