#include<fstream.h>
int main()
{
	unsigned long n,k,a[70001],i,m,x,y,j;

ifstream fin("stergeri.in");
ofstream fout("stergeri.out");
fin>>n>>m>>k;
for(i=1;i<=n;i++) a[i]=i;
for(i=1;i<=m;i++)
{
	cin>>x>>y;
	for(j=x;j<=y;j++) a[j]=a[j+x];
}
fout<<a[k];
fin.close();
fout.close();
return 0;
}
/*
1 2 3 4 5 6 7 8 9 10 11 12
- 1 2 3 8 9 10 11 12
- 1 8 9 10 11 12*/