#include<bits/stdc++.h>
using namespace std;
#define rep(i,x,y) for(int i=(x);i<=(y);++i)
template<class T> bool maximize(T &a, const T &b){ return (a < b) ? a = b, 1 : 0; }
template<class T> bool minimize(T &a, const T &b){ return (a > b) ? a = b, 1 : 0; }
typedef long long ll;
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back
/// end of template ///
const int N = 2e5 + 5;
const int M = 2e5 + 5;
const int Q = 2e5 + 5;
const int lim = 1000;
struct Dsu
{
int n,par[N];
bool ok,xr[N];
Dsu() {}
void init(int _n)
{
n=_n;
for(int i=1;i<=n;++i) par[i]=i,xr[i]=0;
ok=1;
}
int get(int x)
{
if(x==par[x]) return x;
int p=par[x];
par[x]=get(p);
xr[x]^=xr[p];
return par[x];
}
bool unite(int u, int v)
{
int s=get(u),t=get(v);
if(s==t)
{
if(xr[u]==xr[v]) ok=0;
return 0;
}
xr[s]=(xr[u]^1^xr[v]);
par[s]=t;
return 1;
}
};
struct History
{
int u,par,val;
} history[2*lim+10];
int n,m,q,U[M],V[M],L[Q],R[Q];
vector<ii> qr[N/lim+10];
bool ans[Q];
void solve()
{
cin>>n>>m>>q;
rep(i,1,m) cin>>U[i]>>V[i];
int numBlock=(m+lim-1)/lim;
rep(i,1,q)
{
int l,r;
cin>>l>>r;
L[i]=l;
R[i]=r;
qr[(l-1)/lim+1].pb({r,i});
}
rep(block,1,numBlock)
{
int st=(block-1)*lim+1;
sort(all(qr[block]),greater<ii>());
Dsu dsu;
dsu.init(n);
rep(j,1,st-1) dsu.unite(U[j],V[j]);
int ptr=m;
for(ii cm : qr[block])
{
int r=cm.fi,id=cm.se,l=L[id];
while(r<ptr)
{
dsu.unite(U[ptr],V[ptr]);
--ptr;
}
int _h=0;
bool lastOk=dsu.ok;
rep(i,st,l-1)
{
dsu.get(U[i]);
history[++_h]={U[i],dsu.par[U[i]],dsu.xr[U[i]]};
dsu.get(V[i]);
history[++_h]={V[i],dsu.par[V[i]],dsu.xr[V[i]]};
}
rep(i,st,l-1)
{
dsu.unite(U[i],V[i]);
}
ans[id]=1-dsu.ok;
dsu.ok=lastOk;
while(_h>0)
{
int u=history[_h].u,par=history[_h].par,val=history[_h].val;
dsu.xr[u]=val;
dsu.par[u]=par;
dsu.par[par]=par;
dsu.xr[par]=0;
--_h;
}
}
}
rep(i,1,q)
{
cout<<(ans[i]?"YES\n":"NO\n");
}
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
#define TASK "OLP304"
// freopen(TASK".inp","r",stdin);
// freopen(TASK".out","w",stdout);
int testcase=1;
// cin>>testcase;
while (testcase--)
solve();
return 0;
}
