Compilare: main.cpp: In function 'void solve()': main.cpp:29:25: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | for (char oo:s) occ[oo]++; | ^~ main.cpp:38:23: warning: array subscript has type 'char' [-Wchar-subscripts] 38 | int cn = occ[s[kk]], ccn=occ[inv(s[kk])]; | ^ main.cpp:38:37: warning: array subscript has type 'char' [-Wchar-subscripts] 38 | int cn = occ[s[kk]], ccn=occ[inv(s[kk])]; | ~~~^~~~~~~ main.cpp:37:10: warning: unused variable 'fff' [-Wunused-variable] 37 | 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; | ^