Compilare: main.cpp: In function 'int main()': main.cpp:25:18: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | f[i][s[i]]++; | ^ main.cpp:33:81: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | (dp[flag][dim] = dp[old_flag][dim - 1] + ((i - dim + 1) - (f[i][s[i]] - f[dim - 1][s[i]]))) %= mod; | ^ main.cpp:33:100: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | (dp[flag][dim] = dp[old_flag][dim - 1] + ((i - dim + 1) - (f[i][s[i]] - f[dim - 1][s[i]]))) %= mod; | ^