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;
    cout << n+floor(n/2) << "\n";
    for(int i=0; i<n; i++){
       for(int j=0; j<m; j++){
           if(j>ceil(m/2)){
               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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