#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 5;
typedef long long ll;
const ll inf=1e15;
#define pb push_back
const int INF=(0x3f3f3f3f);
int main(){
ios::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
int t;
cin>>t;
while(t-->0){
int n,m;
cin>>n>>m;
if(max(n,m)%min(n,m)==0){
cout<<max(n,m)-1<<'\n';
int x=-1;
if(n==max(n,m))x=1;
for(int i=0;i<max(n,m)-1;i++)cout<<(i+1)*x<<' ';
cout<<'\n';
}else if(min(n,m)==2){
cout<<max(n,m)<<'\n';
int x=-1;
if(n==2)x=1;
int tmp=max(n,m);
int tm=(max(n,m)+1)*(-1);
vector<int>answ;
for(int i=0;i<max(n,m);i++){
if(i%2==0){
answ.pb(tmp);
tmp--;
}else{
answ.pb(tm);
tm++;
}
}
for(int i=0;i<answ.size();i++){
cout<<answ[i]*x<<' ';
}
cout<<'\n';
}else{
/* if(n>m)
while(__gcd(n,m)!=1)n--;
else
while(__gcd(n,m)!=1)m--;*/
cout<<n+m-gcd(n,m)-1<<'\n';
int x=-1;
if(n==2)x=1;
int tmp=max(n,m);
int tm=(max(n,m)+1)*(-1);
vector<int>answ;
for(int i=0;i<n+m-gcd(n,m)-1;i++){
if(i%2==0){
answ.pb(tmp);
tmp--;
}else{
answ.pb(tm);
tm++;
}
}
for(int i=0;i<answ.size();i++){
answ[i]*=x;
}
int su=0;
for(int i=0;i<min(n,m);i++){
su+=answ[i];
}
if(n<m&&su>0){
for(int i=0;i<answ.size();i++){
answ[i]*=-1;
}
}else if(n>m&&su<0){
for(int i=0;i<answ.size();i++){
answ[i]*=-1;
}
}
for(int i=0;i<answ.size();i++){
cout<<answ[i]<<' ';
}
cout<<'\n';
}
}
}
Compilation message
sequence.cpp: In function 'int main()':
sequence.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<answ.size();i++){
~^~~~~~~~~~~~
sequence.cpp:51:17: error: 'gcd' was not declared in this scope
cout<<n+m-gcd(n,m)-1<<'\n';
^~~
sequence.cpp:51:17: note: suggested alternative: 'gcvt'
cout<<n+m-gcd(n,m)-1<<'\n';
^~~
gcvt
sequence.cpp:66:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<answ.size();i++){
~^~~~~~~~~~~~
sequence.cpp:74:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<answ.size();i++){
~^~~~~~~~~~~~
sequence.cpp:78:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<answ.size();i++){
~^~~~~~~~~~~~
sequence.cpp:82:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<answ.size();i++){
~^~~~~~~~~~~~
