Compilare: main.cpp: In function 'int main()': main.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(i=0;i<strlen(t);i++) | ~^~~~~~~~~~ main.cpp:20:18: warning: array subscript has type 'char' [-Wchar-subscripts] 20 | x[t[i]]++; | ~~~^ main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(i=0;i<strlen(s);i++) | ~^~~~~~~~~~ main.cpp:24:18: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | y[s[i]]++; | ~~~^