Compilare: user.c: In function ‘ssnd’: user.c:25:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(n<1000001&&ciur[n]==0||n==1||n==0){ ^ user.c:22:13: warning: unused variable ‘p’ [-Wunused-variable] int i,a,p; ^ user.c: In function ‘main’: user.c:55:13: warning: unused variable ‘j’ [-Wunused-variable] int t,i,j; ^ user.c:53:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(File_in, "r", stdin); ^ user.c:54:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(File_out, "w", stdout); ^ user.c:56:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:60:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^