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OI-codes/Luogu/P7886/P7886.cpp

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#include <bits/stdc++.h>
using namespace std;
int t, n, m, k, c, l;
vector<int> ans;
int main() {
cin >> t;
while (t--) {
c = 1;
cin >> n >> m >> k;
if (n * m % k != 0) {
cout << "NO" << endl;
} else {
cout << "YES" << endl;
for (int i = 1; i <= n; i++) {
ans.clear();
if (i & 1) {
for (int j = 1; j <= m; j++) {
if (!--c) {
l++;
c = k;
}
ans.push_back(l);
}
} else {
for (int j = m; j >= 1; j--) {
if (!--c) {
l++;
c = k;
}
ans.insert(ans.begin(), l);
}
}
for (auto i : ans) {
cout << i << ' ';
}
cout << endl;
}
}
}
return 0;
}