# include <stdio.h>
long int x,y,n,m,k,i,j,q;
int a[4000000];
int main ()
{
freopen ("stergeri.in","r",stdin);
freopen ("stergeri.out","w",stdout);
scanf ("%li",&n);
scanf ("%li",&m);
scanf ("%li",&k);
for (i=1;i<=n;i++)
a[i]=i;
for (j=0;j<m;j++)
{
scanf ("%li",&x);
scanf ("%li",&y);
for (q=x;q<=n;q++)
a[q]=a[q+y-x+1];
}
printf ("%li",a[k]);
return 0;
}