#pragma GCC optimize("O2") #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if __cplusplus >= 202002L #include #include #include #include #include #include #else #define ssize(v) (int)(v).size() #define popcount(x) __builtin_popcountll(x) constexpr int bit_width(const unsigned int x) { return x == 0 ? 0 : ((sizeof(unsigned int) * CHAR_BIT) - __builtin_clz(x)); } constexpr int bit_width(const unsigned long long x) { return x == 0 ? 0 : ((sizeof(unsigned long long) * CHAR_BIT) - __builtin_clzll(x)); } constexpr int countr_zero(const unsigned int x) { return x == 0 ? sizeof(unsigned int) * CHAR_BIT : __builtin_ctz(x); } constexpr int countr_zero(const unsigned long long x) { return x == 0 ? sizeof(unsigned long long) * CHAR_BIT : __builtin_ctzll(x); } constexpr unsigned int bit_ceil(const unsigned int x) { return x == 0 ? 1 : (popcount(x) == 1 ? x : (1u << bit_width(x))); } constexpr unsigned long long bit_ceil(const unsigned long long x) { return x == 0 ? 1 : (popcount(x) == 1 ? x : (1ull << bit_width(x))); } #endif //#define int ll #define INT128_MAX (__int128)(((unsigned __int128) 1 << ((sizeof(__int128) * __CHAR_BIT__) - 1)) - 1) #define INT128_MIN (-INT128_MAX - 1) #define clock chrono::steady_clock::now().time_since_epoch().count() #ifdef DEBUG #define dbg(x) cout << (#x) << " = " << x << '\n' #else #define dbg(x) #endif using namespace std; using ll = long long; using ull = unsigned long long; using ldb = long double; using pii = pair; using pll = pair; //#define double ldb template ostream& operator<<(ostream& os, const pair pr) { return os << pr.first << ' ' << pr.second; } template ostream& operator<<(ostream& os, const array &arr) { for(const T &X : arr) os << X << ' '; return os; } template ostream& operator<<(ostream& os, const vector &vec) { for(const T &X : vec) os << X << ' '; return os; } template ostream& operator<<(ostream& os, const set &s) { for(const T &x : s) os << x << ' '; return os; } signed main() { ios::sync_with_stdio(false), cin.tie(NULL); int n, m; cin >> n >> m; vector a(m); for(int &x : a) { cin >> x; x--; } a.emplace_back(-2); for(int k = 1; k < n; k++) { vector dp(n, INT_MAX); dp[k] = 0; for(int x : a) { vector ord(n); iota(ord.begin(), ord.end(), 0); sort(ord.begin(), ord.end(), [&](int i, int j) { return dp[i] < dp[j]; }); for(int i : ord) { if (dp[i] == INT_MAX) continue; { int j = i + 1; while(j < n and dp[j - 1] + 1 < dp[j]) dp[j] = dp[j - 1] + 1, j++; } { int j = i - 1; while(j >= 0 and dp[j + 1] + 1 < dp[j]) dp[j] = dp[j + 1] + 1, j--; } } vector nxt(n, INT_MAX); for(int i = 0; i < n; i++) { if (x == i - 1) nxt[i - 1] = min(dp[i], nxt[i - 1]); else if (x == i) nxt[i + 1] = min(dp[i], nxt[i + 1]); else nxt[i] = min(nxt[i], dp[i]); } dp.swap(nxt); } cout << dp[0] << " \n"[k + 1 == n]; } return 0; }