#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;
vi graph[201];
vector<pii> edges;
int odw[201];
bool is;
void dfs(int v, int c)
{
odw[v] = c;
forall(it,graph[v])
{
if(odw[it] == -1) dfs(it,c^1);
else
{
if(odw[it] == c) is = 0;
}
}
}
int main()
{
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//random_start();
int n,m,q;
cin >> n >> m >> q;
rep(i,m)
{
int a,b;
cin >> a >> b;
edges.pb({a,b});
}
rep(qq,q)
{
int l,r;
cin >> l >> r;
l--;
r--;
rep2(i,1,n)
{
graph[i] = {};
odw[i] = -1;
}
rep2(i,0,l-1)
{
graph[edges[i].ff].pb(edges[i].ss);
graph[edges[i].ss].pb(edges[i].ff);
}
rep2(i,r+1,m-1)
{
graph[edges[i].ff].pb(edges[i].ss);
graph[edges[i].ss].pb(edges[i].ff);
}
is=1;
rep2(i,1,n)
{
if(odw[i]== -1) dfs(i,0);
}
if(is) cout << "NO\n";
else cout << "YES\n";
}
}
