View Code of Problem 6

#include<stdio.h>
int main()
{
	int t,max,n,l[1000],r[1000],flag,sum,temp;
	scanf("%d",&t);
	while(t--)
	{   max=0; 
	    flag=1;
	    //sum=0;
		scanf("%d",&n);
		for(int i=0;i<n;i++)
		{
			scanf("%d%d",&l[i],&r[i]);
		}
		for(int i=0;i<n;i++)
		{
			temp=r[i]-l[i];
			if(max<temp) max=temp;
		}
		sum=l[0];
		for(int i=0;i<n-1;i++)
		{
		  sum=sum+max;
		if(sum>l[i+1])
		  {
		  flag=0;
		  break;
		  }
			
		}
		if(flag==1)
		printf("YES\n");
		else
		printf("NO\n");
	}
	return 0;
}

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