//#define LOCAL
#include<cstdio>
#include<algorithm>
using namespace std;
int const MAX_N=10005;
int const MAX_M=100;
int const INF=100000000;
int N,M,x[MAX_N],lb,ub;
//判断是否满足条件
bool C(int d)
{
int last=0;
for(int i=1;i<M;i++)
{
int crt=last+1;
while(crt<N&&x[crt]-x[last]<d)
{
crt++;
}
if(crt==N) return false;
last=crt;
}
return true;
}
void init()
{
for(int i=0;i<N;i++)
{
scanf("%d",&x[i]);
}
}
void solve()
{
init();
sort(x,x+N);
lb=0,ub=INF;
while(ub-lb>1)
{
int mid=(lb+ub)/2;
if(C(mid)) lb=mid;
else ub=mid;
}
printf("%d\n",lb);
}
int main()
{
#ifdef LOCAL
freopen("Aggressive cows.in","r",stdin);
freopen("Aggressive cows.out","w",stdout);
#endif
while(~scanf("%d%d",&N,&M))
{
solve();
}
return 0;
}
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时间: 2024-12-20 10:42:13