Compilare: main.cpp: In function 'int main()': main.cpp:21:11: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | f[s[1]]++, fsum[s[1]].val++, fsum[s[1]].last_update = 1; | ^ main.cpp:21:25: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | f[s[1]]++, fsum[s[1]].val++, fsum[s[1]].last_update = 1; | ^ main.cpp:21:43: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | f[s[1]]++, fsum[s[1]].val++, fsum[s[1]].last_update = 1; | ^ main.cpp:23:18: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | fsum[s[i]].val += f[s[i]] * (i - fsum[s[i]].last_update - 1); | ^ main.cpp:23:33: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | fsum[s[i]].val += f[s[i]] * (i - fsum[s[i]].last_update - 1); | ^ main.cpp:23:51: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | fsum[s[i]].val += f[s[i]] * (i - fsum[s[i]].last_update - 1); | ^ main.cpp:24:18: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | fsum[s[i]].last_update = i; | ^ main.cpp:25:15: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | f[s[i]]++; | ^ main.cpp:26:67: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | (dp[i] = dp[i - 1] + (i * (i + 1) / 2) + mod - i * (f[s[i]]) + fsum[s[i]].val) %= mod; | ^ main.cpp:26:81: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | (dp[i] = dp[i - 1] + (i * (i + 1) / 2) + mod - i * (f[s[i]]) + fsum[s[i]].val) %= mod; | ^ main.cpp:27:18: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | fsum[s[i]].val += f[s[i]]; | ^ main.cpp:27:33: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | fsum[s[i]].val += f[s[i]]; | ^