Eroare de compilare: user.c:7:5: error: variably modified ‘x’ at file scope int x[2*Nmax+2]; ^ user.c: In function ‘main’: user.c:20:2: warning: format ‘%ld’ expects argument of type ‘long int *’, but argument 2 has type ‘int *’ [-Wformat=] scanf("%ld",&n); n21=2*n-1; ^ user.c:25:13: warning: implicit declaration of function ‘ltoa’ [-Wimplicit-function-declaration] ltoa(2*i,a,10);//printf("%ld %ld\n",2*i,n+i); ^