Compilare: user.cpp: In function ‘void update(int, char)’: user.cpp:191:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, p; ^ user.cpp: In function ‘void preproc()’: user.cpp:208:18: warning: unused variable ‘cnt’ [-Wunused-variable] int i, j, k, cnt; ^ user.cpp: In function ‘int main()’: user.cpp:235:21: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2010]’ [-Wformat=] scanf("%s\n", &S), N = strlen(S); ^ In file included from user.cpp:157:0: user.cpp:240:14: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] assert(1 <= M/Q <= 20001); ^ user.cpp:227:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k, t, x, VAL, aux; char c; ^ user.cpp:227:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, t, x, VAL, aux; char c; ^ user.cpp:227:18: warning: unused variable ‘t’ [-Wunused-variable] int i, j, k, t, x, VAL, aux; char c; ^