//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("no-stack-protector")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
//#pragma GCC optimize("inline")
//#pragma GCC optimize("-fgcse")
//#pragma GCC optimize("-fgcse-lm")
//#pragma GCC optimize("-fipa-sra")
//#pragma GCC optimize("-ftree-pre")
//#pragma GCC optimize("-ftree-vrp")
//#pragma GCC optimize("-fpeephole2")
//#pragma GCC optimize("-ffast-math")
//#pragma GCC optimize("-fsched-spec")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-falign-jumps")
//#pragma GCC optimize("-falign-loops")
//#pragma GCC optimize("-falign-labels")
//#pragma GCC optimize("-fdevirtualize")
//#pragma GCC optimize("-fcaller-saves")
//#pragma GCC optimize("-fcrossjumping")
//#pragma GCC optimize("-fthread-jumps")
//#pragma GCC optimize("-funroll-loops")
//#pragma GCC optimize("-fwhole-program")
//#pragma GCC optimize("-freorder-blocks")
//#pragma GCC optimize("-fschedule-insns")
//#pragma GCC optimize("inline-functions")
//#pragma GCC optimize("-ftree-tail-merge")
//#pragma GCC optimize("-fschedule-insns2")
//#pragma GCC optimize("-fstrict-aliasing")
//#pragma GCC optimize("-fstrict-overflow")
//#pragma GCC optimize("-falign-functions")
//#pragma GCC optimize("-fcse-skip-blocks")
//#pragma GCC optimize("-fcse-follow-jumps")
//#pragma GCC optimize("-fsched-llerblock")
//#pragma GCC optimize("-fpartial-inlining")
//#pragma GCC optimize("no-stack-protector")
//#pragma GCC optimize("-freorder-functions")
//#pragma GCC optimize("-findirect-inlining")
//#pragma GCC optimize("-fhoist-adjacent-loads")
//#pragma GCC optimize("-frerun-cse-after-loop")
//#pragma GCC optimize("-inline-small-functions")
//#pragma GCC optimize("-finline-small-functions")
//#pragma GCC optimize("-ftree-switch-conversion")
//#pragma GCC optimize("-foptimize-sibling-calls")
//#pragma GCC optimize("-fexpensive-optimizations")
//#pragma GCC optimize("-funsafe-loop-optimizations")
//#pragma GCC optimize("inline-functions-called-once")
//#pragma GCC optimize("-fdelete-null-poller-checks")
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned ll
#define vi vector<ll>
#define vvi vector<vi>
#define all(x) x.begin(), x.end()
#define pb push_back
#define mp make_pair
#define ld long double
#define pii pair<ll, ll>
#define mt make_tuple
#define mn(a, b) a = min(a, b)
#define mx(a, b) a = max(a, b)
#define base complex<ld>
#define START_DEPTH 18
using namespace std;
const ll inf = (ll)1e18;
const ld eps = (ld)1e-12;
const ll mod = (ll)1e9 + 7;
const ll mod2 = (ll)1e9 + 9;
const ll MAXN = (ll)2e5 + 10;
const ll MAXC = (ll)1e5 + 10;
const ll MAXLOG = (ll)20;
const ll asci = (ll)256;
const ll block = 316;
const ld PI = acos(-1LL);
const ll INF = 2e9;
const ld e = 2.7182818284;
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//
//typedef tree<
//ll,
//null_type,
//less<ll>,
//rb_tree_tag,
//tree_order_statistics_node_update>
//ordered_set;
// === Debug macro starts here ===
template<typename A, typename B>
string to_string(pair<A, B> p);
template<typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);
template<typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
string to_string(const string &s) {
return '"' + s + '"';
}
string to_string(const char *s) {
return to_string((string) s);
}
string to_string(vector<bool> v) {
bool first = true;
string res = "{";
for (ll i = 0; i < static_cast<ll>(v.size()); i++) {
if (!first) {
res += ", ";
}
first = false;
res += to_string(v[i]);
}
res += "}";
return res;
}
template<typename A>
string to_string(A v) {
bool first = true;
string res = "{";
for (const auto &x: v) {
if (!first) {
res += ", ";
}
first = false;
res += to_string(x);
}
res += "}";
return res;
}
template<typename A, typename B>
string to_string(pair<A, B> p) {
return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
template<typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")";
}
string to_string(char c) {
return string() + c;
}
template<typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " +
to_string(get<3>(p)) + ")";
}
template<typename A, std::size_t N>
string to_string(A (&v)[N]) {
bool first = true;
string res = "{";
for (ll i = 0; i < N; i++) {
if (!first) {
res += ", ";
}
first = false;
res += to_string(v[i]);
}
res += "}";
return res;
}
void debug_out() { cerr << "\n"; }
template<typename Head, typename... Tail>
void debug_out(Head &H, Tail... T) {
cerr << " " << to_string(H);
debug_out(T...);
}
#ifdef DEBUG
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__);
#else
#define dbg(...);
#endif
// === Debug macro ends here ===
pii operator +(const pii &a, const pii &b) {
return {a.first + b.first, a.second + b.second};
}
template <class T>
istream& operator >>(istream &in, vector<T> &arr){
for (T &cnt : arr) {
in >> cnt;
}
return in;
};
void solve() {
int n, m, q; cin >> n >> m >> q;
vvi comps(n);
vi id(n);
for (int i = 0; i < n; ++i) comps[i] = {i}, id[i] = i;
for (int j = 0; j < m; ++j) {
vi p(n); cin >> p;
dbg(comps);
dbg(id);
dbg(p);
for (int i = 0; i < n; ++i) {
if (id[p[i] - 1] != id[i]) {
int id_n = id[p[i] - 1];
for (int k : comps[id_n]) {
comps[id[i]].push_back(k);
id[k] = id[i];
}
comps[id_n].clear();
}
dbg(comps);
dbg(id);
}
}
dbg(comps);
dbg(id);
while (q--) {
int a, b; cin >> a >> b;
--a, --b;
if (id[a] == id[b]) {
cout << "DA\n";
} else cout << "NE\n";
}
}
signed main() {
srand(time(0LL));
#ifdef DEBUG
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#else
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
#endif
cout.precision(30);
//#define TEST
#ifdef TEST
ll t; cin >> t;
while (t--)
#endif
solve();
return 0LL;
}
