#include <bits/stdc++.h>
using namespace std;
void solve() {}
const long long maxn = 1050;
long long n, a, b;
long long ans[maxn][maxn];
void no() {
  cout << "NO" << '\n';
  exit(0);
}
signed main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> a >> b;
  if (min(a, b) > 1) no();
  if ((n == 2 or n == 3) and a == 1 and b == 1) no();
  long long c = 1, d = 0;
  if (b != 1) {
    swap(a, b);
    swap(c, d);
  }
  for (long long i = 1; i <= n; i++) {
    ans[i][i] = 0;
    for (long long j = 1; j <= n; j++) {
      if (i != j) {
        ans[i][j] = ans[j][i] = d;
      }
    }
  }
  for (long long i = a; i + 1 <= n; i++) {
    ans[i][i + 1] = ans[i + 1][i] = c;
  }
  cout << "YES" << '\n';
  for (long long i = 1; i <= n; i++) {
    for (long long j = 1; j <= n; j++) {
      cout << ans[i][j];
    }
    cout << '\n';
  }
}
