Compilare: main.cpp: In function 'void F(nod*&, int)': main.cpp:26:6: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 26 | if(p<strlen(a))F(R->x[a[p]-'a'], p+1); | ~^~~~~~~~~~ main.cpp: In function 'void S(nod*, int, int&)': main.cpp:32:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 32 | else if(p<strlen(a))S(R->x[a[p]-'a'], p+1, t); | ~^~~~~~~~~~ main.cpp: In function 'void C(nod*&, int, int&)': main.cpp:42:7: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 42 | {if(p<strlen(a))C(R->x[a[p]-'a'], p+1, k); | ~^~~~~~~~~~ main.cpp: In function 'void D(nod*, int, int&)': main.cpp:51:7: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 51 | if(p<strlen(a))D(R->x[a[p]-'a'], p+1, maxi); | ~^~~~~~~~~~