#include <stdio.h>
int v[200000000];
int main(){
	long i,j,x,y,k,n,m;
	freopen("stergeri.in","r",stdin);
	freopen("stergeri.out","w",stdout);
	scanf("%ld%ld%ld",&n,&m,&k);
	for (i=1;i<=n;++i)
		v[i]=i;
	for (i=1;i<=m;++i){
		scanf("%lld%lld",&x,&y);
		for (j=1;j<=n;++j)
			if (x<=j&&j<=n-y+x)
				v[j]=v[j+y-x+1];
	}
	printf("%lld",v[k]);
	return 0;
}