#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 = 1300;
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;
}
} dsu;
int n,m,q,U[M],V[M],L[Q],R[Q],f[Q];
vector<ii> qr[N/lim+10];
bool ans[Q];
void dnc(int l, int r, int lo, int hi)
{
if(l>r) return;
int mid((l+r)>>1);
rep(i,max(mid,lo),hi)
{
cout<<mid<<' '<<i<<' '<<U[i]<<' '<<V[i]<<'\n';
dsu.unite(U[i],V[i]);
if(dsu.ok==0)
{
break;
}
f[mid]=i;
}
dsu.ok=1;
rep(i,max(mid,lo),min(f[mid+1],m))
{
dsu.xr[U[i]]=0;
dsu.par[U[i]]=U[i];
dsu.xr[V[i]]=0;
dsu.par[V[i]]=V[i];
}
dnc(l,mid-1,lo,f[mid]);
dnc(mid+1,r,f[mid],hi);
}
void solve()
{
cin>>n>>m>>q;
rep(i,1,m) cin>>U[i]>>V[i];
dsu.init(n);
dnc(1,m,1,m);
rep(i,1,m) cout<<i<<' '<<f[i]<<'\n';
rep(i,1,q)
{
int l,r;
cin>>l>>r;
cout<<(f[l]>=r?"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;
}
