Codeforces Round #639 (Div. 2) A. Puzzle Pieces

题目链接:http://codeforces.com/contest/1345/problem/A

problem description

You are given a special jigsaw puzzle consisting of n⋅m identical pieces. Every piece has three tabs and one blank, as pictured below.

The jigsaw puzzle is considered solved if the following conditions hold:
1.The pieces are arranged into a grid with n rows and m columns.
2.For any two pieces that share an edge in the grid, a tab of one piece fits perfectly into a blank of the other piece.
Through rotation and translation of the pieces, determine if it is possible to solve the jigsaw puzzle.

Input

The test consists of multiple test cases. The first line contains a single integer t (1≤t≤1000) — the number of test cases. Next t

lines contain descriptions of test cases.

Each test case contains two integers n
and m (1≤n,m≤105).

output

For each test case output a single line containing “YES” if it is possible to solve the jigsaw puzzle, or “NO” otherwise. You can print each letter in any case (upper or lower).

Example

Input
3
1 3
100000 100000
2 2
Output
YES
NO
YES

Note

For the first test case, this is an example solution:

For the second test case, we can show that no solution exists.
For the third test case, this is an example solution:

通过思考并且结合所给的输入与输出结果，可以猜测，只有2×2以及1×m或者n×1可以通过测试

#include 
using namespace std;
int main()
{
	int n,m,T;
	cin>>T;
	while(T--)
    {
        cin>>n>>m;
        if(n==1||m==1)
            cout<<"YES"<<endl;
        else if(n==2&&m==2)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }
    return 0;
}