#include <iostream>
#include <vector>
using namespace std;
vector<vector<int>> moves;
vector<vector<int>> dp;
int n, m, q;
int makeDp(int toy, int box){
if(toy == box) return dp[toy][box] = 1;
if(dp[toy][box] == 2) return 0;
if(dp[toy][box] != -1) return dp[toy][box];
dp[toy][box] = 2;
for(int i = 1; i<=m; i++){
if(makeDp(toy, moves[i][box]) == 1){
dp[toy][box] = 1;
break;
}
}
if(dp[toy][box] == 2 ) dp[toy][box] = 0;
return dp[toy][box];
}
int main(void){
//freopen("input.txt", "r", stdin);
cin>>n>>m>>q;
moves.assign(m+1, vector<int>(n+1, 0));
dp.assign(n+1, vector<int>(n+1, -1));
for(int i = 1; i<=m; i++){
for(int j = 1; j<=n; j++) cin>>moves[i][j];
}
for(int i = 0; i<q; i++){
int t, b;
cin>>t>>b;
if(makeDp(t, b)) cout<<"DA\n";
else cout<<"NE\n";
}
return 0;
}
