Compilare: In file included from /usr/include/c++/12.2.1/cstdlib:77, from /usr/include/c++/12.2.1/ext/string_conversions.h:41, from /usr/include/c++/12.2.1/bits/basic_string.h:3960, from /usr/include/c++/12.2.1/string:53, from /usr/include/c++/12.2.1/bits/locale_classes.h:40, from /usr/include/c++/12.2.1/bits/ios_base.h:41, from /usr/include/c++/12.2.1/ios:42, from /usr/include/c++/12.2.1/ostream:38, from /usr/include/c++/12.2.1/iostream:39, from main.cpp:1: In function 'long long int std::abs(long long int)', inlined from 'int main()' at main.cpp:126:27: /usr/include/c++/12.2.1/bits/std_abs.h:61:51: warning: 'r1' may be used uninitialized [-Wmaybe-uninitialized] 61 | abs(long long __x) { return __builtin_llabs (__x); } | ^ main.cpp: In function 'int main()': main.cpp:103:13: note: 'r1' was declared here 103 | int r1, cc; | ^~ In function 'long long int std::abs(long long int)', inlined from 'int main()' at main.cpp:92:27: /usr/include/c++/12.2.1/bits/std_abs.h:61:51: warning: 'r1' may be used uninitialized [-Wmaybe-uninitialized] 61 | abs(long long __x) { return __builtin_llabs (__x); } | ^ main.cpp: In function 'int main()': main.cpp:69:13: note: 'r1' was declared here 69 | int r1, cc; | ^~ main.cpp:123:15: warning: 'xdr' may be used uninitialized [-Wmaybe-uninitialized] 123 | x --; | ~~^~ main.cpp:27:14: note: 'xdr' was declared here 27 | int xst, xdr; | ^~~ main.cpp:89:15: warning: 'xst' may be used uninitialized [-Wmaybe-uninitialized] 89 | x --; | ~~^~ main.cpp:27:9: note: 'xst' was declared here 27 | int xst, xdr; | ^~~ main.cpp:67:5: warning: 'cul' may be used uninitialized [-Wmaybe-uninitialized] 67 | if (cul == 1) | ^~ main.cpp:26:9: note: 'cul' was declared here 26 | int cul; // cul == 1 st, cul == -1 dr | ^~~