#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;
#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout (T t, U...u) {cout << t << (sizeof... (u) ? ", " : ""), dout (u...);}
#else
#define debug(...) 7122
#endif
#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second
const int SIZE = 1005;
int n, m, q;
bool g[SIZE][SIZE];
void solve() {
cin >> n >> m >> q;
while (m--) {
FOR (i, 1, n) {
int p;
cin >> p;
g[p][i] = 1;
}
}
FOR (k, 1, n) FOR (i, 1, n) if (g[i][k]) FOR (j, 1, n) g[i][j] |= g[k][j];
while (q--) {
int a, b;
cin >> a >> b;
cout << (g[a][b] ? "DA" : "NE") << '\n';
}
}
int main() {
Waimai;
solve();
}
