```cpp
#include <stdio.h>
int maxn=-1;
int main(int argc, char const *argv[])
{
int n,i,a,b;scanf("%d",&n);
for(i=1;i<=n;++i)
{
scanf("%d %d",&a,&b);
if(b-a>maxn)
maxn=b-a;
}
if(maxn==-1)
puts("vacant");
else
printf("%d",maxn);
return 0;
}
```
by Etinorally @ 2022-12-04 12:49:47
```
int argc, char const *argv[]
```
这是什么意思
by AcxxMz @ 2022-12-04 12:52:06
@[bye_wjx](/user/575994)
by AcxxMz @ 2022-12-04 12:52:22
```c
#include<bits/stdc++.h>
using namespace std;
int n,a,b,maxx;
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a>>b;maxx=max(maxx,b-a);
}
if(maxx==0) cout<<"vacant";
else cout<<maxx;
}
```
by Zhouw @ 2022-12-04 13:07:41
@[1234aaa](/user/492190)
by Zhouw @ 2022-12-04 13:08:00
```c
#include<bits/stdc++.h>
using namespace std;
int main()
{
int j,n,m,high=0,sum=0;
cin>>j;
for(int i=1;i<=j;i++)
{
cin>>n>>m;
sum=m-n;
if(sum>high) high=sum;
}
if(high<=0)cout<<"vacant";
else cout<<high;
}
```
把你的也改了下
~~码风有些凌乱，别介意~~
by Zhouw @ 2022-12-04 13:15:58