Compilare: main.cpp: In function 'int main()': main.cpp:34:9: warning: array subscript has type 'char' [-Wchar-subscripts] F[S[i]]++; ^ main.cpp:37:13: warning: array subscript has type 'char' [-Wchar-subscripts] if (F[S[i]] == 1) ^ main.cpp:44:8: warning: array subscript has type 'char' [-Wchar-subscripts] F[r]--; ^ main.cpp:48:12: warning: array subscript has type 'char' [-Wchar-subscripts] if (F[r] == 0) ^ main.cpp:30:6: warning: unused variable 'st' [-Wunused-variable] int st = 1, dr = 1, sumlit = 0, maxi = -1, ii = 0, jj = 0, s = 0; ^~ main.cpp:30:14: warning: unused variable 'dr' [-Wunused-variable] int st = 1, dr = 1, sumlit = 0, maxi = -1, ii = 0, jj = 0, s = 0; ^~ main.cpp:30:61: warning: unused variable 's' [-Wunused-variable] int st = 1, dr = 1, sumlit = 0, maxi = -1, ii = 0, jj = 0, s = 0; ^