Compilare: main.cpp: In function 'int main()': main.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(i=1; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(i=1; i<s.size(); i++) pi[i]=0; | ~^~~~~~~~~ main.cpp:13:27: warning: unused variable 'cnt' [-Wunused-variable] 13 | int i, n, res=0, k=0, cnt=0, cnt2=0, j; | ^~~ main.cpp:13:34: warning: unused variable 'cnt2' [-Wunused-variable] 13 | int i, n, res=0, k=0, cnt=0, cnt2=0, j; | ^~~~ main.cpp:15:10: warning: unused variable 'ch' [-Wunused-variable] 15 | char ch; | ^~