Compilare: main.cpp: In function 'bool rezolva()': main.cpp:36:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < s1.length()) ~~^~~~~~~~~~~~~ main.cpp:56:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < s2.length()) ~~^~~~~~~~~~~~~ main.cpp:79:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<pentru1.size(); i++) ~^~~~~~~~~~~~~~~