Compilare: user.cpp: In function ‘void Compute()’: user.cpp:161:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < Ex.size()) ^ user.cpp:103:33: warning: ‘o’ may be used uninitialized in this function [-Wmaybe-uninitialized] int k, last(0), counter(0), o, d(0), op; ^ user.cpp:164:12: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] ++i; ^