Compilare: main.cpp: In function 'void solve()': main.cpp:45:23: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | int cn = occ[s[kk]][k], ccn=occ[inv(s[kk])][k]; | ^ main.cpp:45:40: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | int cn = occ[s[kk]][k], ccn=occ[inv(s[kk])][k]; | ~~~^~~~~~~ main.cpp:56:16: warning: array subscript has type 'char' [-Wchar-subscripts] 56 | tot += occ[lett][kk+1]; | ^~~~ main.cpp:44:10: warning: unused variable 'fff' [-Wunused-variable] 44 | 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; | ^