Eroare de compilare: main.cpp: In function 'int putere(int, int)': main.cpp:19:23: error: 'mod' was not declared in this scope 19 | r = 1ll * r * r % mod; | ^~~ main.cpp: In function 'int inversmodular(int)': main.cpp:27:22: error: 'mod' was not declared in this scope 27 | return putere(x, mod-2); | ^~~ main.cpp: In function 'int main()': main.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (int i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 1; i < b.size(); i++) | ~~^~~~~~~~~~ Non zero exit status: 1