#include<stdio.h>

#define INPUT "stergeri.in"
#define OUTPUT "stergeri.out"
#define DIM 10001

void Rezolvare();
int n,m,k,x,y,a[DIM];
int main()
{
    freopen(INPUT,"r",stdin);
    freopen(OUTPUT,"w",stdout);
    Rezolvare();
    return 0;
}
void Rezolvare()
{
	 int i,j,p;
	 scanf("%d%d%d",&n,&m,&k);
	 for(i=1; i<=n; ++i)
     	a[i]=i;
	 for(i=1; i<=m; ++i)
     {
			  scanf("%d%d",&x,&y);
			  for(j=x; j<=y; ++j)
			  {
				 for(p=x; p<n; ++p)
					a[p]=a[p+1];
				 --n;
			  }

	 }
	 printf("%d",a[k]);
}