你第6行数组开小了，开到10500。
还有第七行的循环范围改成0到L
by spencer @ 2023-11-14 20:36:13
@[OHMYXUAN](/user/1152380)
by spencer @ 2023-11-14 20:36:37
把数组开大一点就好了
by tooexpensivetoattend @ 2023-11-14 20:57:55
@[spencer](/user/172136) OK got it 谢谢你
by OHMYXUAN @ 2023-11-15 08:21:31
@[spencer](/user/172136) 可是还是只有30分啊
by OHMYXUAN @ 2023-11-15 08:25:57
我帮你调好了，能ac，你自己看看哪里有问题
```cpp
#include <iostream>
using namespace std;
int main(){
int l,m,sum=0;
cin>>l>>m;
int a[10500];
for(int i=0;i<=l;i++){
a[i]=1;
}
while(m--){
int x,y;
cin>>x>>y;
for(int i=x;i<=y;i++){
if(a[i]==1){
a[i]=0;
}
}
}
for(int i=0;i<=l;i++){
if(a[i]==1){
sum++;
}
}
cout<<sum;
return 0;
}
```
by spencer @ 2023-11-15 13:38:34
@[OHMYXUAN](/user/1152380)
by spencer @ 2023-11-15 13:39:19
@[spencer](/user/172136) @[spencer](/user/172136) ok了 谢谢神犇
by OHMYXUAN @ 2023-11-15 18:10:13
@[OHMYXUAN](/user/1152380) 给个关注呗qaq
by spencer @ 2023-11-15 18:26:48
@[spencer](/user/172136) okey
by OHMYXUAN @ 2023-11-15 19:09:50