Compilare: main.cpp: In function 'int main()': main.cpp:24:103: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | long long ceva = 1LL * (s.size() - i - 2) * (s.size() - i - 1) / 2 + s.size() - i - 1 - f[s[i]] - cnt[s[i]]; | ^ main.cpp:24:115: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | long long ceva = 1LL * (s.size() - i - 2) * (s.size() - i - 1) / 2 + s.size() - i - 1 - f[s[i]] - cnt[s[i]]; | ^ main.cpp:26:15: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | f[s[i]] += s.size() - i - 1; | ^ main.cpp:27:17: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | cnt[s[i]]++; | ^ main.cpp:11:12: warning: unused variable 'j' [-Wunused-variable] 11 | int i, j; | ^