Compilare: main.cpp: In function 'int main()': main.cpp:21:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=0;i<strlen(s);i++) | ~^~~~~~~~~~ main.cpp:23:24: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | nrs[s[i]]++; | ~~~^ main.cpp:25:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i=0;i<strlen(t);i++) | ~^~~~~~~~~~ main.cpp:27:24: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | nrt[t[i]]++; | ~~~^