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## 문제

Bobo draws $n$ intervals on the axis, which are conveniently numbered by $1, 2, \dots, n$. As an excellent mathematician, he managed to set all $n$ intervals of length $10^6$.

Then bobo carefully computes $I_{i, j}$, the length of the intersection of intervals $i$ and $j$, and discards all intervals. However, bobo wants to check his calculations and he is eager to know whether the result can be correct.

In another word, determine if there exists $n$ intervals of length $10^6$ providing the same result.

## 입력

The first line contains an integer $n$ ($1 \leq n \leq 1000$).

Each of the following $n$ lines contains $n$ integers $I_{i, 1}, I_{i, 2}, \dots, I_{i, n}$ ($0 \leq I_{i, j} \leq 10^6$).

Since bobo knows math well, it is guaranteed that $I_{i, j} = I_{j, i}$ and $I_{i, i} = 10^6$.

## 출력

If for given $I_{i,j}$ it is possible to find at least one appropriate set of intervals, print "Yes". Otherwise, print "No".

## 예제 입력 1

3
1000000 500000 0
500000 1000000 500000
0 500000 1000000


## 예제 출력 1

Yes


## 예제 입력 2

3
1000000 500000 500000
500000 1000000 500000
500000 500000 1000000


## 예제 출력 2

No