Compilare: main.cpp: In function 'int count(std::__cxx11::string, std::__cxx11::string)': main.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= a.size(); i++) ~~^~~~~~~~~~~ main.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= b.size(); i++) { ~~^~~~~~~~~~~ main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= a.size(); i++) { ~~^~~~~~~~~~~ main.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= a.size(); i++) ~~^~~~~~~~~~~ main.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j <= b.size(); j++) ~~^~~~~~~~~~~ main.cpp: In function 'double solve(std::__cxx11::string)': main.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < n; i++) ~~^~~ main.cpp:57:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j <= n; j++) ~~^~~~