Compilare: main.cpp: In function 'void decompress(int, int, int, int)': main.cpp:29:9: warning: unused variable 'a' [-Wunused-variable] 29 | int a = getNr(); | ^ main.cpp: In function 'int main()': main.cpp:49:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for( i = 0; i < s.size(); ){ | ~~^~~~~~~~~~ main.cpp:57:7: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] 57 | if( a == 0 ) a = 1; | ^~