Compilare: main.cpp: In function 'int main()': main.cpp:40:24: warning: array subscript has type 'char' [-Wchar-subscripts] if (fr[s[i]]==0) ^ main.cpp:42:24: warning: array subscript has type 'char' [-Wchar-subscripts] fr[s[i]]=nr; ^ main.cpp:45:39: warning: array subscript has type 'char' [-Wchar-subscripts] sum=(sum+putere[i]*fr[s[i]])%MOD; ^ main.cpp:63:24: warning: array subscript has type 'char' [-Wchar-subscripts] if (fr[s[i]]==0) ^ main.cpp:65:24: warning: array subscript has type 'char' [-Wchar-subscripts] fr[s[i]]=nr; ^ main.cpp:68:39: warning: array subscript has type 'char' [-Wchar-subscripts] sum=(sum+putere[i]*fr[s[i]])%MOD; ^