Compilare: main.cpp: In function 'int main()': main.cpp:39:15: warning: array subscript has type 'char' [-Wchar-subscripts] 39 | fv[s[i]]++; | ~~~^ main.cpp:50:16: warning: iteration 29 invokes undefined behavior [-Waggressive-loop-optimizations] 50 | fact[i]=(fact[i-1]*i)%MOD; | ^ main.cpp:49:14: note: within this loop 49 | for(i=1;i<=30;i++) | ~^~~~