View Code of Problem 6

#include<stdio.h>

int main()
{
	int i,j=0,t,n,l[100],r[100],s[100];
	scanf("%d",&t);
    while(t--)
	{
		scanf("%d",&n);
		for (i=0;i<n;i++)
			scanf("%d%d",&l[i],&r[i]);
		for (i=0;i<n;i++)
			s[i]=r[i]-l[i];
		for (i=1;i<n;i++)
			if(s[0]!=s[i])
				j=1;
			if (j==1)
			printf("NO\n");
			else 
				printf("YES\n");
		printf("\n");
	}
	return 0;
}

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