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>
#define pb push_back
#define LL long long
#define Kultivator ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define int LL
using namespace std;
const LL Mxn = 1e5 + 7;
const LL Mod = 1e9 + 7;
const LL Inf = 1e14 + 7;
signed main(){
    Kultivator;
    int tt;
    cin >> tt;
    while(tt--){
        int N, M;
        cin >> N >> M;
        if(N == M) cout << 0 << '\n';
        else if(min(N, M) < 3){
            if(N < M){
                cout << M - 1 << '\n';
                for(int i = 1; i < M; i++){
                    cout << -1 << ' ';
                }
            } else {
                cout << N - 1 << '\n';
                for(int i = 1; i < N; i++){
                    cout << 1 << ' ';
                }
            }
        }
        cout << '\n';
    }
}
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