Compilare: main.cpp: In function 'int main()': main.cpp:30:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }if(perebor) {cout << perebor; for(i=1; i<s.length(); i+=2) cout << s[i];} ~^~~~~~~~~~~ main.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else for(int i=1; i<s.length(); i+=2) cout << s[i]; ~^~~~~~~~~~~