Compilare: user.cpp: In function ‘int main()’: user.cpp:25:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=s.size(); ++i) ^ user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s.size()-1-i>=n-f && s[i]>t[f]) --f; ^ user.cpp:23:6: warning: unused variable ‘v’ [-Wunused-variable] int v=0; ^