Compilare: main.cpp: In function 'int main()': main.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i=0;i<strlen(s);i++) | ~^~~~~~~~~~ main.cpp:39:14: warning: array subscript has type 'char' [-Wchar-subscripts] 39 | f[s[i]]++; | ~~~^ main.cpp:40:17: warning: array subscript has type 'char' [-Wchar-subscripts] 40 | if(f[s[i]]==1) n++; | ~~~^ main.cpp:41:22: warning: array subscript has type 'char' [-Wchar-subscripts] 41 | else if(f[s[i]]==2) repetari++; | ~~~^