> while (i--) {
> 	scanf("%d%d",&poster[i].start,&poster[i].end);
> 	dismaping[poster[i].start-1] = dismaping[poster[i].end] = 2;
> }
> for (i = 1; i < 10000005; i++) {
> 	dismaping[i] += dismaping[i-1];
> }