#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
using namespace std;
#define fi ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//#define ll double
#define ll1 long long
#define F first
#define S second
#define sz size()
#define all(s) s.begin(),s.end()
#define all1(s) s.rbegin(),s.rend()
int main()
{
//freopen("stdin.in","r",stdin);freopen("stdout.out","w",stdout);
int T=1;
//cin>>T;ll oo=0;
while(T--)
{
ll n,k,z;
cin>>n>>k>>z;
ll arr[n];
for(ll i=0;i<n;i++){
cin>>arr[i];
}
map<ll,ll>m,d;
for(ll i=0;i<z;i++){
ll a,b;
cin>>a>>b;
m[a]=b;
}ll c=k-z;ll mn=1e18;ll o=0;
for(ll i=0;i<n;i++){
d[arr[i]]++;
if(d[arr[i]]==m[arr[i]])c++;
while(c==k){//cout<<i<<" "<<o<<"\n";
mn=min(mn,(i-o+1));d[arr[o]]--;
if(d[arr[o]]<m[arr[o]])c--;
o++;
}
}cout<<mn;
}
}
