Compilare: main.cpp: In function 'int main()': main.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size() - l; i++) { ~~^~~~~~~~~~~~~~ main.cpp:28:98: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((s[curr] != s[curr - l] && isalpha(s[curr]) && isalpha(s[curr - l])) || curr >= s.size()) ~~~~~^~~~~~~~~~~ main.cpp:23:22: warning: unused variable 'currSize' [-Wunused-variable] int res = 0, currSize = 0; ^~~~~~~~