Compilare: user.cpp:60:0: warning: "fiu" redefined [enabled by default] #define fiu p[i] ^ user.cpp:28:0: note: this is the location of the previous definition #define fiu p[*s-'a'] ^ user.cpp:78:0: warning: "fiu" redefined [enabled by default] #define fiu p[*P-'a'] ^ user.cpp:60:0: note: this is the location of the previous definition #define fiu p[i] ^ user.cpp: In function ‘void dfs(trie*)’: user.cpp:39:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(register int i=0;i<nod->v.size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:46:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j; ^