#include "bits/stdc++.h"
#define ff first
#define ss second
#define pp pop_back
#define ll long long
#define pb emplace_back
#define pq priority_queue
#define ls(v) (int)v.size()
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define mnpq(asd) asd,vector<asd>,greater<asd>
#define fe(a,b,i) for(int i = a;i<=b;++i)
#define ef(a,b,i) for(int i = a;i>=b;--i)
#define pii pair<int,int>
#define wr cout << "------------------------" << endl
using namespace std;
signed main(){
ios::sync_with_stdio(false);cin.tie(nullptr);
int n,q,m;
cin >> n >> q >> m;
int id = -1;
for(int i = 1;i<=n;++i){
int x;
cin >> x;
if(x == m)
id = i;
}
assert(~id);
while(q--){
int l,r;
cin >> l >> r;
if(l == r)
continue;
if(l <= id and id <= r){
if(m == 1)
id = l;
else
id = l + 1;
}
}
cout << id << endl;
return 0;
}
