Compilare: main.cpp: In function 'void solve()': main.cpp:42:23: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | int cn = occ[s[kk]][k], ccn=occ[inv(s[kk])][k]; | ^ main.cpp:42:40: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | int cn = occ[s[kk]][k], ccn=occ[inv(s[kk])][k]; | ~~~^~~~~~~ main.cpp:53:16: warning: array subscript has type 'char' [-Wchar-subscripts] 53 | tot += occ[lett][kk+1]; | ^~~~ main.cpp:41:10: warning: unused variable 'fff' [-Wunused-variable] 41 | char fff = inv(s[kk]); | ^~~ main.cpp: At global scope: main.cpp:14:18: warning: 'l' defined but not used [-Wunused-variable] 14 | static int k, q, l, n; | ^