Compilare: main.cpp: In function 'int main()': main.cpp:42:16: warning: array subscript has type 'char' [-Wchar-subscripts] fv[s[i]]++; ^ main.cpp:44:9: warning: variable 'p4' set but not used [-Wunused-but-set-variable] int p4; ^~ main.cpp:48:15: warning: unused variable 'lg' [-Wunused-variable] long long lg=k; ^~ main.cpp:49:15: warning: variable 'ss' set but not used [-Wunused-but-set-variable] long long ss=0; ^~ main.cpp:50:15: warning: unused variable 'a' [-Wunused-variable] long long a,b; ^ main.cpp:50:17: warning: unused variable 'b' [-Wunused-variable] long long a,b; ^ main.cpp:51:15: warning: unused variable 'x1' [-Wunused-variable] long long x1,x2,cx; ^~ main.cpp:51:18: warning: unused variable 'x2' [-Wunused-variable] long long x1,x2,cx; ^~ main.cpp:51:21: warning: variable 'cx' set but not used [-Wunused-but-set-variable] long long x1,x2,cx; ^~