Compilare: user.cpp: In function ‘int main()’: user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= strlen(A + 1); ++i ) ^ user.cpp:53:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1; i <= strlen(A+1); ++i ) ^ user.cpp:69:14: warning: ‘Sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] os << Sol+1; ^