Compilare: main.cpp: In function 'int main()': main.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if(dr == s.size() + 1) j = st; | ~~~^~~~~~~~~~~~~~~ main.cpp:33:40: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 33 | if(s[i] != s[j] || st == 0 && dr == n + 1) | ~~~~~~~~^~~~~~~~~~~~~~ main.cpp:40:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | while(j <= s.size() && s[j] == c) | ~~^~~~~~~~~~~