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 main()
{
ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
int t;
cin >> t;
while(t--){
int n, m;
cin >> n >> m;
if(n<=m){
int e = (n-1)/2;
cout << m+e << endl;
for(int i=0; i<n; i++){
if(e!=0){
for(int j=0; j<m; j++)
cout << '+';
e--;
}
else{
for(int j=0; j<m; j++)
cout << '-';
}
cout << endl;
}
}
else{
int e = (m-1)/2;
cout << n+e << endl;
for(int i=0; i<n; i++){
if(e!=0){
for(int j=0; j<m; j++)
cout << '-';
e--;
}
else{
for(int j=0; j<m; j++)
cout << '+';
}
cout << endl;
}
}
}
}
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