Compilare: main.cpp: In function 'int main()': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<s.size() - 1; i++){ ~^~~~~~~~~~~~~ main.cpp:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=2; i<s.size(); i++){ ~^~~~~~~~~ main.cpp:79:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<s.size(); i++){ ~^~~~~~~~~ main.cpp:83:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pali[i] + pali[i] + 1 + 2 == s.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:100:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pali[i] + pali[i] + 1 + 2 == s.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~