Compilare: main.cpp: In function 'int main()': main.cpp:20:43: warning: array subscript has type 'char' [-Wchar-subscripts] 20 | suma=(n-i-1)*(n-i-2)/2+n-i-1-f[s[i]]-dp[s[i]]; | ~~~^ main.cpp:20:52: warning: array subscript has type 'char' [-Wchar-subscripts] 20 | suma=(n-i-1)*(n-i-2)/2+n-i-1-f[s[i]]-dp[s[i]]; | ~~~^ main.cpp:22:14: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | f[s[i]]=f[s[i]]+n-i-1; | ~~~^ main.cpp:22:22: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | f[s[i]]=f[s[i]]+n-i-1; | ~~~^ main.cpp:23:15: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | dp[s[i]]++; | ~~~^