Compilare: main.cpp: In function 'int main()': main.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<s.size();i++) ~^~~~~~~~~ main.cpp:26:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (urm[i]==a.size()&&i>a.size()) ~~~~~~^~~~~~~~~~ main.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (urm[i]==a.size()&&i>a.size()) ~^~~~~~~~~