#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ll long long
#define ar array
#define ld long double
const int N = 3e5 + 20;
const int K = 200;
const int INF = 1e15;
const int LOG = 24;
const int MOD = 998244353;
struct DSU{
vector<int> p;
vector<int> c;
vector<int> sz;
vector<int> bi;
DSU(int n){
p.clear();
sz.clear();
bi.clear();
c.clear();
p.resize(n);
sz.resize(n, 1);
bi.resize(n, 1);
c.resize(n, 0);
for(int i = 0;i < n;i++)p[i] = i;
}
ar<int,2 > find(int x){
if(x == p[x])return {x, c[x]};
ar<int,2 > q = find(p[x]);
return {q[0], q[1] ^ c[x]};
}
vector<pair<int&, int> > rb;
bool join(int a,int b){
ar<int, 2> pa = find(a);
ar<int, 2> pb = find(b);
a = pa[0];
b = pb[0];
int ca = pa[1];
int cb = pb[1];
rb.push_back({p[a], p[a]});
rb.push_back({sz[a], sz[a]});
rb.push_back({bi[a], bi[a]});
rb.push_back({c[a], c[a]});
rb.push_back({p[b], p[b]});
rb.push_back({sz[b], sz[b]});
rb.push_back({bi[b], bi[b]});
rb.push_back({c[b], c[b]});
if(a == b){
if(ca == cb)bi[a] = 0;
return 0;
}
if(sz[a] < sz[b])swap(a, b), swap(ca, cb);
sz[a] += sz[b];
p[b] = a;
c[b] = cb ^ ca ^ 1;
bi[a] &= bi[b];
return 1;
}
inline bool bip(int x){
return bi[find(x)[0]];
}
void roll(){
for(int i = 0;i < 8;i++){
rb.back().first = rb.back().second;
rb.pop_back();
}
}
};
signed main(){ios_base::sync_with_stdio(false);cin.tie(0);
int n, m, q;
cin>>n>>m>>q;
ar<int, 2> e[m];
for(int i = 0;i < m;i++){
int u, v;
cin>>u>>v;
--u, --v;
e[i] = {u, v};
}
//assert(0);
if(n <= 2000 && m <= 2000 && q <= 2000){
while(q--){
int l, r;
cin>>l>>r;
--l, --r;
DSU d(n);
bool ans = 1;
for(int i = 0;i < m;i++){
if(l <= i && i <= r)continue;
d.join(e[i][0], e[i][1]);
if(!d.bip(e[i][0])){
ans = 0;
break;
}
}
cout<< (ans ? "NO\n" : "YES\n");
}
return 0;
}
}
