#include<cstdio>
#include<algorithm>
#include<vector>
using namespace std;
int main()
{
    int i,j,n,m,k;
    vector<int> a;
    freopen("stergeri.in","r",stdin);
    freopen("stergeri.out","w",stdout);
    scanf("%d%d%d",&n,&m,&k);
    for(i=1;i<=n;i++) a.push_back(i);
    while(m)
    {
        scanf("%d %d",&i,&j);
        a.erase(a.begin()+i,a.begin()+j+1);
        m--;
    }
    printf("%d",a[k-1]);
    return 0;
}