OJ-Problems-Source/HDOJ/3650_autoAC.cpp
2016-09-04 14:13:02 +08:00

36 lines
626 B
C++

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