#include <bits/stdc++.h>
using namespace std;
struct query
{
int l,r,i;
query(){}
query(int _l,int _r,int _i)
{
l=_l;
r=_r;
i=_i;
}
};
struct edge
{
int x,y;
edge(){}
edge(int _x,int _y)
{
x=_x;
y=_y;
}
};
int n,m,k;
query a[200001];
pair<int,int> e[200001],q[200001];
void read()
{
cin>>n>>m>>k;
for(int i=1;i<=m;i++)
{
int x,y;
cin>>x>>y;
e[i]={x,y};
}
for(int i=1;i<=k;i++)
{
int l,r;
cin>>l>>r;
q[i]={l,r};
a[i]={l,r,i};
}
}
int used[200001];
vector<int> v[200001];
bool pos;
void dfs(int i)
{
for(int j=0;j<v[i].size();j++)
{
int nb=v[i][j];
if(!used[nb])
{
used[nb]=1;
if(used[i]==1)used[nb]=2;
dfs(nb);
}
else if(used[i]==used[nb])pos=0;
}
}
void slow()
{
for(int i=1;i<=k;i++)
{
pos=1;
for(int j=1;j<=n;j++)
{
used[j]=0;
v[j].clear();
}
for(int j=1;j<q[i].first;j++)
{
v[e[j].first].push_back(e[j].second);
v[e[j].second].push_back(e[j].first);
}
for(int j=q[i].second+1;j<=m;j++)
{
v[e[j].first].push_back(e[j].second);
v[e[j].second].push_back(e[j].first);
}
for(int j=1;j<=n;j++)
{
if(!used[j])
{
used[j]=1;
dfs(j);
}
}
if(pos)cout<<"NO"<<endl;
else cout<<"YES"<<endl;
}
}
int minr[200001];
int sz[200001];
pair<int,int> p[200001];
void init()
{
pos=1;
for(int i=1;i<=n;i++)
p[i]={i,0},sz[i]=1;
}
pair<int,int> parent(int x)
{
if(x==p[x].first)return p[x];
int curr=p[x].second;
p[x]=parent(p[x].first);
p[x].second+=curr;
return p[x];
}
void unite(int x,int y)
{
pair<int,int> pxx=parent(x);
pair<int,int> pyy=parent(y);
int px=pxx.first;
int py=pyy.first;
if(px!=py)
{
if(sz[px]>sz[py])swap(px,py);
p[px]={py,pxx.second+1};
sz[py]+=sz[px];
}
else
{
//cout<<x<<" "<<y<<" "<<pxx.second<<" "<<pyy.second<<endl;
if(pxx.second%2==pyy.second%2)
pos=0;
}
}
void subt()
{
for(int i=1;i<=min(200,m);i++)
{
//cout<<i<<endl;
init();
for(int j=1;j<i;j++)
{
unite(e[j].first,e[j].second);
if(pos==0)
{
//cout<<"in"<<" "<<i<<" "<<j<<endl;
minr[i]=m+1;
break;
}
}
for(int j=m;j>i;j--)
{
unite(e[j].first,e[j].second);
if(pos==0)
{
//cout<<"in"<<" "<<i<<" "<<j<<endl;
minr[i]=max(minr[i],j);
break;
}
}
}
for(int i=1;i<=k;i++)
{
if(minr[q[i].first]>q[i].second)cout<<"YES"<<endl;
else cout<<"NO"<<endl;
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
read();
if(n<=2000)slow();
else subt();
return 0;
}
