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| #include<bits/stdc++.h>
using namespace std; const int N=1e5; int niu[N]; int n; int m; bool check(int mid) { int t=1 ; int first=niu[0]; for(int i=1;i<n;i++) { if((niu[i]-first)>=mid) {first=niu[i]; t++;} else continue; } return t>=m;
}
int main() { cin>>n>>m; for(int i=0;i<n;i++) { cin>>niu[i];
} sort(niu,niu+n); int l=0; int r=1e9; while(l<r) { int mid=l+r+1>>1; if(!check(mid)) l =mid; else r=mid-1;
}
cout<<r;
return 0; }
|