Compilare: main.cpp:3: warning: ignoring '#pragma target ' [-Wunknown-pragmas] 3 | #pragma target( "avx2" ) | main.cpp: In function 'int main()': main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 51 | while( s1.size() < n ) | ~~~~~~~~~~^~~ main.cpp:76:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for( i = 1 ; i <= s1.size() ; i++ ) { | ~~^~~~~~~~~~~~