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>
typedef long long ll;
using namespace std;
void solve(){
    int n, m;
    cin >> n >> m;
    
    if(n<m){
        cout << m << "\n";
        for(int i=0; i<n; i++){
            for(int j=0; j<m; j++){
                cout << "-";
            }
            cout << "\n";
        }
    }
    else if(n>m){ 
        cout << n << "\n";
        for(int i=0; i<n; i++){
            for(int j=0; j<m; j++){
                cout << "+";
            }
            cout << "\n";
        }
    }
    else{
       cout << n+ceil(n/2) << endl;
       for(int i=0; i<n; i++){
            for(int j=0; j<m; j++){
                if(j<ceil(m/2)+m%2-1){
                    cout << "-";
                }
                else{
                    cout << "+";
                }
            }
            cout << "\n";
        } 
    }
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    while(t--){
        solve();
    }
    return 0;
}
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