Compilare: user.cpp: In function ‘int main()’: user.cpp:20:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i][y[i]]=i; ^ user.cpp:30:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] s=s+q-a[q][x[j][p]]; ^ user.cpp:31:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] q=a[q][x[j][p]]-1; ^ user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==strlen(x[j])&&q>=0){ ^