sort是左闭右开区间，你这个bs[n]比较不到吧
应该是
```cpp
sort(bs+1, bs+n+1, cmp)
```
by a746 @ 2023-04-06 13:25:34
@[a746](/user/533770) 过了，谢谢大佬！
by permeate798 @ 2023-04-06 20:37:00
```
#include<bits/stdc++.h>
using namespace std;
struct A {
int s;
int f;
};
bool cmp(A b,A d) {
return b.f<d.f;
}
int main() {
int n,t=0,sum=1;
cin>>n;
A c[n];
for(int i=0; i<n; i++) {
cin>>c[i].s>>c[i].f;
}
sort(c,c+n,cmp);
t=c[0].f;
for(int i=1; i<n; i++) {
if(c[i].s>=t) {
t=c[i].f;
sum++;
}
}
cout<<sum;
return 0;
}
```
by jiangjinke @ 2023-06-14 16:16:18