@[chenxinhao0402](/user/799227) for后面有分号
by zgy_123 @ 2023-02-01 08:35:48
@[chenxinhao0402](/user/799227)
1. memset需要加cstring头文件
2. 后面循环改为
```
for(int i=0;i<=1;i++)
if(tree[i]==0)s++;
```
by Misophiliac @ 2023-02-01 08:36:24
不行啊，全WA了
by chenxinhao0402 @ 2023-02-01 08:43:14
请问lz的l，m输入了吗
by hzoi_Shadow @ 2023-02-01 08:44:29
int后面跟了啊
by chenxinhao0402 @ 2023-02-01 08:46:37
@[chenxinhao0402](/user/799227) 最后一个循环是到l吧
by Misophiliac @ 2023-02-01 08:49:11
@[The_Shadow_Dragon](/user/848964)
by chenxinhao0402 @ 2023-02-01 08:49:31
@[chenxinhao0402](/user/799227) 你只是定义，没有输入
by hzoi_Shadow @ 2023-02-01 08:50:03
for(int i=0;i<=1,i++);
if(tree[i]==0)s++;
printf("%d",s);
return 0;
这样？
by chenxinhao0402 @ 2023-02-01 08:51:09
```
#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
int l,m,tree[10010]={0},a,b,s=0;
scanf("%d%d",&l,&m);
memset(tree,0,sizeof(tree));
for (int i=0;i<m;i++)
{
scanf("%d%d",&a,&b);
for(int j=a;j<=b; j++)
tree[j]=1;
}
for(int i=0;i<=1;i++)
if(tree[i]==0)s++;
printf("%d",s);
return 0;
}
```
采纳
by chenxinhao0402 @ 2023-02-01 08:54:04