Compilare: main.cpp: In function 'int main()': main.cpp:16:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=n+1;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:38:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=n+1;i<sir.size() && nr>0;i++) ~^~~~~~~~~~~