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>
using namespace std;
int a[1005][1005];
void solve()
{
int n,m;
cin>>n>>m;
bool swaps=false;
if(n<m)
{
swap(n,m);
swaps=true;
}
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++) a[i][j]=0;
}
int res=0;
int t=n/2;
for(int i=1;i<=(m-1)/2;i++)
{
for(int j=1;j<=n;j++,t--)
{
a[j][res+1]=1;
if(!t)
{
res++;
t=n/2+1;
}
}
}
cout<<res+n<<'\n';
if(swaps) swap(n,m);
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
int cur=a[i][j];
if(swaps) cur=(a[j][i]^1);
if(cur) cout<<'-';
else cout<<'+';
}
cout<<'\n';
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin>>t;
while(t--) solve();
}
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