View Code of Problem 6

#include<stdio.h>
int main()
{
	int n,m;
	int t,i,j,k,a[100];
	scanf("%d",&t);
	while(t--)
	{
		int max=0;
		int flag=0;
		scanf("%d",&n);
		for(i=0;i<n;i++)
		{
			int l,r;
			scanf("%d %d",&l,&r);
			if(r-l>max)
			max=r-l;
			a[i]=l; 
		}
		for(i=0;i<n;i++)
		{
			if(a[i]+max>a[i+1])
			flag=1;
		}
		if(flag==0)
		printf("YES\n");
		else
		printf("NO\n");
	}
}