Compilare: main.cpp: In function 'int main()': main.cpp:14:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < strlen(t) - 1; i++){ | ~~^~~~~~~~~~~~~~~ main.cpp:16:26: warning: array subscript has type 'char' [-Wchar-subscripts] 16 | if(ok[t[i]] == 0) | ~~~^ main.cpp:19:31: warning: array subscript has type 'char' [-Wchar-subscripts] 19 | ok[t[i]]++; | ~~~^