Compilare: main.cpp: In function 'void solve(std::__cxx11::string)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) { ~~^~~~~~~~~~ main.cpp:20:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (s[i - 1] == 'x') ^ main.cpp:31:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (s[i - 1] == 'x') ^ main.cpp:42:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (s[i - 1] == 'x') ^ main.cpp:53:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (s[s.size() - 1] == 'x') ^