Compilare: main.cpp: In function 'bool pal(std::__cxx11::string)': main.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<s.size(); i++){ ~^~~~~~~~~ main.cpp: In function 'void brut()': main.cpp:41:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<cit.size(); i++){ ~^~~~~~~~~~~ main.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i; j<cit.size(); j++){ ~^~~~~~~~~~~ main.cpp:47:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int J=j+1; J<cit.size(); J++){ ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:84:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<s.size() - 1; i++){ ~^~~~~~~~~~~~~ main.cpp:98:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=2; i<s.size(); i++){ ~^~~~~~~~~ main.cpp:115:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<s.size(); i++){ ~^~~~~~~~~ main.cpp:119:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pali[i] + pali[i] + 1 + 2 == s.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:136:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pali[i] + pali[i] + 1 + 2 == s.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~