Compilare: main.cpp: In function 'int main()': main.cpp:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i=0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | while(i+cnt[i]<a.size() && i-cnt[i]>=0 && a[i+cnt[i]]==a[i-cnt[i]]) | ~~~~~~~~^~~~~~~~~ main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0; i<a.size(); i++) | ~^~~~~~~~~