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            #define MAXN 100005int c[MAXN];int lowbit(int x){ return x&(-x);}void update(int x,int num){ while(x>0) { c[x]+=num; x-=lowbit(x); }}int getSum(int x){ int s=0; while(x<=MAXN) { s+=c[x]; x+=lowbit(x); } return s;}int main(){ //freopen("in.txt","r",stdin); int n,a,b; while(~scanf("%d",&n)&&n) { memset(c,0,sizeof(c)); for(int j=1; j<=n; j++) { scanf("%d%d",&a,&b); update(b,1); update(a-1,-1); } for(int i=1; i