View Code of Problem 6

#include <cstdio>

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

Double click to view unformatted code.


Back to problem 6