#include<stdio.h>
FILE *in=fopen("stergeri.in","r");
FILE *out=fopen("stergeri.out","w");
int main()
{
long int n,m,i,j,k,a,b,v[16000],aa;
fscanf(in,"%ld",&n);
fscanf(in,"%ld",&m);
fscanf(in,"%ld",&k);
v[0]=0;
for(i=1;i<=n;i++) v[i]=i;
for(i=1;i<=m;i++)
	{
	fscanf(in,"%ld",&a);
	fscanf(in,"%ld",&b);
	aa=a;
	for(j=a;j<=b;j++)
		v[j]=0;
	for(j=b+1;j<=n;j++)
		v[a++]=v[j];
	n-=(b-aa+1);
	}
for(i=1;k>0;i++)
	{
	k--;
	if(k==0) fprintf(out,"%ld",v[i]);
	}
return 0;
}