Compilare: user.cpp: In function ‘void read()’: user.cpp:40:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[50001]’ [-Wformat=] scanf("%s %s", &s, &c); ^ user.cpp:40:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[50001]’ [-Wformat=] user.cpp: In function ‘void solve()’: user.cpp:45:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:48:5: warning: unused variable ‘nperm’ [-Wunused-variable] int nperm; ^