Compilare: main.cpp: In function 'bool Verify(int)': main.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].length() < lg) ~~~~~~~~~~~~~~^~~~ main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = lg;j < s[i].length();++j) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:31: warning: unused variable 'mid' [-Wunused-variable] int left = 1, right = 60, mid, ans; ^~~ main.cpp:72:20: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << ans << "\n"; ^~~~