36 lines
626 B
C++
36 lines
626 B
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <cstdlib>
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#include <algorithm>
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#define N 86444
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using namespace std;
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int s[N],e[N],n;
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inline void read()
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{
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memset(s,0,sizeof s);
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memset(e,0,sizeof e);
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for(int i=1,a,b;i<=n;i++)
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{
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scanf("%d%d",&a,&b);
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if(a>b) swap(a,b);
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s[a]++; e[b]++;
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}
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}
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inline void go()
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{
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int ans=0,res=0;
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for(int i=0;i<=86400;i++)
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{
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res+=s[i];
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ans=max(ans,res);
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res-=e[i];
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}
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printf("%d\n",ans);
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}
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int main()
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{
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while(scanf("%d",&n),n) read(),go();
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return 0;
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}
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