```
#include<cstdio>
#include<algorithm>
#define N 1000000
using namespace std;
struct Thing{long long int b,e;}thing[N];
bool cmp(Thing a,Thing b)
{
return a.e < b.e;
}
int main()
{
int n,ans = 1;
scanf("%d",&n);
for(int i=1;i<=n;i++)scanf("%lld%lld",&thing[i].b,&thing[i].e);
sort(thing+1,thing+1+n,cmp);
// for(int i=1;i<=n;i++)printf("%d %d\n",thing[i].b,thing[i].e);
long long int t = thing[1].e;
for(int i=1;i<=n;i++)
{
if (t <= thing[i].b)ans++,t = thing[i].e;
}
printf("%d",ans);
return 0;
}```
by Merci @ 2019-02-03 13:18:10
@[石破天惊](/space/show?uid=9032) 你的循环有错，我代码发给你了QwQ
by Merci @ 2019-02-03 13:18:43
@[sam上帝](/space/show?uid=122822) 为什么要从 **1** 开始
by 石破天惊 @ 2019-02-03 13:23:46
@[sam上帝](/space/show?uid=122822) 谢谢**dalao**，过了(￣▽￣)／
by 石破天惊 @ 2019-02-03 13:26:36
@[石破天惊](/space/show?uid=9032) 1和2都行
by Merci @ 2019-02-03 13:37:14