Compilare: main.cpp: In function 'int main()': main.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();j++){ ~^~~~~~~~~ main.cpp:80:13: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] lee(x,y); ^ main.cpp:80:13: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]