This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
*/
using namespace std;
#pragma GCC optimize ("unroll-loops,Ofast,O3")
#pragma GCC target("avx,avx2,fma")
#define F first
#define S second
#define sz(x) (int)x.size()
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define NFS ios_base::sync_with_stdio(0) , cin.tie(0) , cout.tie(0) ;
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
//#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
typedef long long ll;
const int E = 1e6+777;
const long long inf = 1e18+777;
const int N = 1e5+777;
const int MOD = 1e9+7;
const bool I = 1;
int main(){auto solve=[&](){
int n, m;
cin >> n >> m;
if(n == 2 && m == 2){
cout << "2\n-5 5\n";
}else if(n == 2){
cout << m << '\n';
cout << 2 << " ";
for(int i = 1; i < m; ++i)
cout << -1 << ' ';
cout << '\n';
}else if(m == 2){
cout << n << '\n';
cout << -2 << ' ';
for(int i = 1; i < n; ++i)
cout << 1 << ' ';
cout << '\n';
}else{
cout << "0\n";
}
};NFS;int T=1;if(I)cin>>T;while(T--)solve();}
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