#include<bits/stdc++.h>
#define int long long
const int N = 1e5 + 10;
using namespace std;
int T;
int n, m, q;
void solve () {
    cin >> n >> m >> q;
    vector <int> hang (n + 1, 0);
    vector <int> lie (m + 1, 0);
    vector <int> ph (n + 1, -1);
    vector <int> pl (m + 1, -1);
    for (int i = 1, op, x, c; i <= q; ++i) {
        cin >> op >> x >> c;
        if (op == 0) {
            hang[x] = i;
            ph[x] = c;
        }
        if (op == 1) {
            lie[x] = i;
            pl[x] = c;
        }
    }
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            if (hang[i] > lie[j]) cout << ph[i] << " ";
            else if (hang[i] < lie[j])cout << pl[j] << " ";
            else cout << "0" << " ";
        }
        cout << '\n';        
    }

}
signed main() {
    freopen("paint.in","r",stdin);
    freopen("paint.out","w",stdout);
    for (cin >> T; T; --T) solve();
    return 0;
}