Compilare: main.cpp: In function 'int maxcost(std::__cxx11::string)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < s.size() - 1; i++) { ~~^~~~~~~~~~~~~~ main.cpp: In function 'int conts(std::__cxx11::string)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < s.size() - 1; i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size() - 1; i++) { ~~^~~~~~~~~~~~~~ main.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; i++) { ~~^~~