OJ-Problems-Source/POJ/3190_csdn.cpp

64 lines
938 B
C++
Raw Normal View History

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<queue>
using namespace std;
const int maxn=60000;
int n,use[maxn];
struct Node
{
int l;
int r;
int pos;
bool operator <(const Node &a)const
{
if(r==a.r)
return l>a.l;
return r>a.r;
}
}a[maxn];
priority_queue<Node> q;
bool cmp(Node a,Node b)
{
if(a.l==b.l)
return a.r<b.r;
return a.l<b.l;
}
int main()
{
while(scanf("%d",&n)!=EOF)
{
for(int i=0;i<n;i++)
{
scanf("%d%d",&a[i].l,&a[i].r);
a[i].pos=i;
}
sort(a,a+n,cmp);
q.push(a[0]);
int now=0,ans=1;
use[a[0].pos]=1;
for(int i=1;i<n;i++)
{
if(!q.empty()&&q.top().r<a[i].l)
{
use[a[i].pos]=use[q.top().pos];
q.pop();
}
else
{
ans++;
use[a[i].pos]=ans;
}
q.push(a[i]);
}
printf("%d\n",ans);
for(int i=0;i<n;i++)
printf("%d\n",use[i]);
while(!q.empty())
q.pop();
}
return 0;
}