@[someone002](/user/778747)
```
#include<bits/stdc++.h>
using namespace std;
int m,n,a[100005],l;
int check(int x)
{
int cnt=0,last=0;
for(int i=1;i<=n+1;i++)
{
if(a[i]-a[last]>=x)last=i;
else cnt++;
}
return cnt<=m;
}
int main()
{
cin>>l>>n>>m;
for(int i=1;i<=n;i++)cin>>a[i];
a[0]=0;
a[n+1]=l;
int l=0,r=1e9+1;
while(l+1<r)
{
int mid=(l+r)/2;
if(check(mid)==true)l=mid;
else r=mid;
}
cout<<l;
return 0;
}
```
by zvzvzgdfdw @ 2023-07-25 21:50:40