Compilare: main.cpp:17:0: warning: ignoring #pragma warning [-Wunknown-pragmas] #pragma warning "da 100% din tine. :)" main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < k.length(); ++i) { ~~^~~~~~~~~~~~ main.cpp:55:19: warning: array subscript has type 'char' [-Wchar-subscripts] if (f[k[i]]) { ^ main.cpp:59:15: warning: array subscript has type 'char' [-Wchar-subscripts] f[k[i]] = 1; ^