Compilare: user.c: In function ‘main’: user.c:39:66: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while((i-j+1>y || v[ dq1[p1] ] -v[ dq2[p2] ]>z && p1<=u1 && p2<=u2 ) && i-j+1>=x){ ^ user.c:12:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sir.in","r",stdin); ^ user.c:13:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sir.out","w",stdout); ^ user.c:15:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&x,&y,&z); ^ user.c:18:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^