# 牛客第五场D drop Voicing

• 给定一个排列支持两种操作
• 把倒数第二个拿到第一个去
• 把第一个拿到最后一个去
• 求吧整个序列调整成升序 最少需要连续操作1的操作次数

• LIS
Tutorial: 插入查找复杂度: O ( n l o g n ) O(nlogn) 总复杂度: O ( n 2 l o g ( n ) ) O(n^2 log(n))
code:
#include bits/stdc++.h

using namespace std;

#define local
#ifdef local

templateclass T
void _E(T x) { cerr  x; }

void _E(double x) { cerr  fixed  setprecision(6)  x; }

void _E(string s) { cerr  "\""  s  "\""; }

templateclass A, class B
void _E(pairA, B x) {
cerr  '(';
_E(x.first);
cerr  ", ";
_E(x.second);
cerr  ")";
}

templateclass T
void _E(vectorT x) {
cerr  "[";
for (auto it = x.begin(); it != x.end(); ++it) {
if (it != x.begin()) cerr  ", ";
_E(*it);
}
cerr  "]";
}

void ERR() {}

templateclass A, class... B
void ERR(A x, B... y) {
_E(x);
cerr  (sizeof...(y) ? ", " : " ");
ERR(y...);
}

#define debug(x...) do { cerr  "{ "#x" } - { "; ERR(x); cerr  "}"  endl; } while(false)
#else
#define debug(...) 114514.1919810
#endif
#define _rep(n, a, b) for (ll n = (a); n = (b); ++n)
#define _rev(n, a, b) for (ll n = (a); n = (b); --n)
#define _for(n, a, b) for (ll n = (a); n  (b); ++n)
#define _rof(n, a, b) for (ll n = (a); n  (b); --n)
#define oo 0x3f3f3f3f3f3f
#define ll long long
#define db long double
#define eps 1e-3
#define bin(x) cout  bitset10(x)  endl;
#define what_is(x) cerr  #x  " is "  x  endl
#define met(a, b) memset(a, b, sizeof(a))
#define all(x) x.begin(), x.end()
#define pii pairll, ll
#define pdd pairdb, db
#define endl "\n"
#define ls ch[now][0]
#define rs ch[now][1]
const ll mod = 998244353;
const ll maxn = 2e5 + 10;

ll qpow(ll a, ll b) {
ll ret = 1;
for (; b; a = a * a % mod, b = 1) {
if (b  1) {
ret = ret * a % mod;
}
}
return ret;
}

vectorll f(maxn), invf(maxn);

ll inv(ll a) {
return qpow(a, mod - 2);
}

void prework() {
f[0] = 1;
_rep(i, 1, maxn - 1) {
f[i] = f[i - 1] * i % mod;
}
invf[maxn - 1] = qpow(f[maxn - 1], mod - 2);
for (ll i = maxn - 2; i = 0; i--) {
invf[i] = invf[i + 1] * (i + 1) % mod;
}

}

ll C(ll n, ll m) {
if (n  m || m  0)return 0;
if (n == 0 || m == n) return 1;
ll res = (f[m] * invf[m - n] % mod * invf[n]) % mod;
return res;
}

vectorpii  G[maxn];
vectorll a;
int n;

ll lis(int l, int r) {
vectorll dp(n + 1, oo);
_rep(i, l, r) {
*lower_bound(all(dp), a[i]) = a[i];
}
return lower_bound(all(dp), oo) - dp.begin();
}

signed main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin  n;
a.resize(n * 2 + 1);
_rep(i, 1, n) {
cin  a[i];
a[i + n] = a[i];
}
ll res = 0;

_rep(i, 1, n) {
res = max(res, lis(i, i + n - 1));
}
cout  n-res  endl;
}

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