Compilare: main.cpp: In function 'int main()': main.cpp:54:23: warning: array subscript has type 'char' [-Wchar-subscripts] uz[F[i][0]] = 1; ^ main.cpp:61:32: warning: array subscript has type 'char' [-Wchar-subscripts] if (!uz2[it]){ ^ main.cpp:62:31: warning: array subscript has type 'char' [-Wchar-subscripts] uz2[it] = 1; ^ main.cpp:64:45: warning: array subscript has type 'char' [-Wchar-subscripts] for (auto it2 : F[it]){ ^ main.cpp:65:40: warning: array subscript has type 'char' [-Wchar-subscripts] if (!uz[it2]){ ^ main.cpp:66:39: warning: array subscript has type 'char' [-Wchar-subscripts] uz[it2] = 1; ^