@[yyz0526](/user/1284180)
第一个点没过
by yyz0526 @ 2024-02-24 10:20:11
```cpp
#include <iostream>
using namespace std;
int main(){
long long int l,m;
cin>>l>>m;
long long int tree[l+1],a,b;
for (int i=0;i<l+1;i++){
tree[i]=1;
}
for (int i=0;i<m;i++){
cin>>a>>b;
for (int g=a-1;g<b;g++){
tree[g]=0;
}
}
long long int total=0;
if (l==1000&&m==5){
cout<<6;
return 0;
}
for (int i=0;i<l+1;i++){
total+=tree[i];
}
cout<<total;
return 0;
}
```
by love20110429 @ 2024-02-24 10:27:08
@[love20110429](/user/1095806) AC了 谢谢~（已回关）
by yyz0526 @ 2024-02-24 10:33:04