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 <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;
void solve(){
int n, m;
cin >> n >> m;
int sol;
if(n>m){
if(n%m==0){
sol=max(n-1, m*2-1);
}
else{
sol=(n/m+1)*m-1;
}
cout << sol << '\n';
if(sol==n-1){
for(int i=0; i<sol; i++){
cout << 1 << ' ';
}
cout << '\n';
}
else{
int br=(sol+m-1)/m+1;
for(int i=1; i<=sol; i++){
if(i%m){
cout << -br << ' ';
}
else{
cout << br*(m-1)+1 << ' ';
}
}
cout << '\n';
}
}
else if(n<m){
if(m%n==0){
sol=max(m-1, n*2-1);
}
else{
sol=(m/n+1)*n-1;
}
cout << sol << '\n';
if(sol==m-1){
for(int i=0; i<sol; i++){
cout << -1 << ' ';
}
cout << '\n';
}
else{
int br=(sol+n-1)/n+1;
for(int i=1; i<=sol; i++){
if(i%n){
cout << br << ' ';
}
else{
cout << -br*(n-1)-1 << ' ';
}
}
cout << '\n';
}
}
else{
cout << n-1 << '\n';
for(int i=0; i<n-1; i++){
cout << 1 << ' ';
}
cout << '\n';
}
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t;
cin >> t;
while(t--){
solve();
}
return 0;
}
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