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 = 1e3;
const LL Mod = 1e9;
const LL Inf = 1e14 + 7;
signed main(){
Kultivator;
int tt;
cin >> tt;
while(tt--){
int N, M;
cin >> N >> M;
if(N == M){
cout << N - 1 << '\n';
for(int i = 1; i < N; i++){
cout << true << ' ';
}
}
else if(min(N, M) == 2){
if(max(N, M) % 2){
cout << max(N, M) << '\n';
if(N < M){
cout << Mod - 1 << ' ';
for(int i = 1; i < M - 1; i++){
if(i % 2){
cout << -Mod << ' ';
} else {
cout << Mod - 1 << ' ';
}
}
cout << Mod - 1 << ' ';
} else {
cout << -Mod + 1 << ' ';
for(int i = 1; i < N - 1; i++){
if(i % 2){
cout << Mod << ' ';
} else {
cout << -Mod + 1 << ' ';
}
}
cout << -Mod + 1 << ' ';
}
} else {
cout << max(N, M) - 1 << '\n';
if(N > M){
for(int i = 1; i < N; i++){
cout << 1 << ' ';
}
} else {
for(int i = 1; i < M; i++){
cout << -1 << ' ';
}
}
}
} else if(min(N, M) == 1){
cout << max(N, M) - 1 << '\n';
if(N < M){
for(int i = 1; i < M; i++){
cout << -1 << ' ';
}
} else {
for(int i = 1; i < N; i++){
cout << 1 << ' ';
}
}
} else if(abs(N - M) < 3){
cout << max(N, M) << '\n';
if(N < M){
cout << (Mxn * (M - 2)) - 1 << ' ';
for(int i = 1; i < M - 1; i++){
cout << -Mxn << ' ';
}
cout << (Mxn * (M - 2)) - 1 << ' ';
} else {
cout << (-Mxn * (N - 2)) + 1 << ' ';
for(int i = 1; i < N - 1; i++){
cout << Mxn << ' ';
}
cout << (-Mxn * (N - 2)) + 1 << ' ';
}
}
cout << '\n';
}
}
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