Compilare: main.cpp: In function 'int main()': main.cpp:20:14: warning: array subscript has type 'char' [-Wchar-subscripts] 20 | f[v[i]]++; | ~~~^ main.cpp:21:18: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | if (f[v[i]] == 1) | ~~~^ main.cpp:29:19: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | f[v[st]]--; | ~~~~^ main.cpp:30:23: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | if (f[v[st]] == 0) | ~~~~^ main.cpp:17:47: warning: 'maxdr' may be used uninitialized [-Wmaybe-uninitialized] 17 | int st = 0, currc = 0, maxlen = 0, maxst, maxdr; | ^~~~~ main.cpp:17:40: warning: 'maxst' may be used uninitialized [-Wmaybe-uninitialized] 17 | int st = 0, currc = 0, maxlen = 0, maxst, maxdr; | ^~~~~