Compilare: main.cpp: In function 'int main()': main.cpp:18:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = 0; i < strlen(s); i++) | ~~^~~~~~~~~~~ main.cpp:19:18: warning: array subscript has type 'char' [-Wchar-subscripts] 19 | a[s[i]]++; | ~~~^ main.cpp:20:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 0; i < strlen(t); i++) | ~~^~~~~~~~~~~ main.cpp:21:18: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | b[t[i]]++; | ~~~^