传送门
题意: 有一组数据,你可以任意顺序拿去,求相邻两个相同数字的最小距离的max。
思路:
- 要想最小距离最大,那么意味着需要让相同的数字在整个数组中等距放置。
- 统计得到最大出现次数maxx,再统计出现maxx次的元素个数cnt。详细步骤见代码!
代码实现:
#include<bits/stdc++.h>
#define endl '\n'
#define null NULL
#define ll long long
#define int long long
#define pii pair<int, int>
#define lowbit(x) (x &(-x))
#define ls(x) x<<1
#define rs(x) (x<<1+1)
#define me(ar) memset(ar, 0, sizeof ar)
#define mem(ar,num) memset(ar, num, sizeof ar)
#define rp(i, n) for(int i = 0, i < n; i ++)
#define rep(i, a, n) for(int i = a; i <= n; i ++)
#define pre(i, n, a) for(int i = n; i >= a; i --)
#define IOS ios::sync_with_stdio(0); cin.tie(0);cout.tie(0);
const int way[4][2] = {
{
1, 0}, {
-1, 0}, {
0, 1}, {
0, -1}};
using namespace std;
const int inf = 0x7fffffff;
const double PI = acos(-1.0);
const double eps = 1e-6;
const ll mod = 1e9 + 7;
const int N = 2e5 + 5;int t, n, maxx, cnt, a[100010];
map<int, int> mp;signed main()
{
IOS;cin>>t;while(t --){
cin >> n;mp.clear();maxx = 0, cnt = 0;for(int i = 1; i <= n; i ++){
cin >> a[i], mp[a[i]] ++;maxx = max(maxx,mp[a[i]]);}for(auto it : mp) if(it.second == maxx) cnt ++;if(maxx == n) cout << 0 << endl;else if(maxx == 2) cout << n - cnt - 1 << endl;else{
int tmp = n/maxx;int m = n%maxx + n/maxx;m -= cnt;cout << tmp - 1 + (m / (maxx-1)) << endl;}}return 0;
}