# include <stdio.h>   
long int x,y,n,m,k,i,j,q;   
int a[2000000];   
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;   
}