Compilare: main.cpp: In function 'int main()': main.cpp:22:18: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | f[i][s[i]]++; | ^ main.cpp:28:75: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | (dp[i][dim] = dp[i - 1][dim - 1] + ((i - dim + 1) - (f[i][s[i]] - f[dim - 1][s[i]]))) %= mod, | ^ main.cpp:28:94: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | (dp[i][dim] = dp[i - 1][dim - 1] + ((i - dim + 1) - (f[i][s[i]] - f[dim - 1][s[i]]))) %= mod, | ^