Submission #585178

#	Time	Username	Problem	Language	Result	Execution time	Memory
585178		MilosMilutinovic	Nekameleoni (COCI15_nekameleoni)	C++14	70 / 140	3081 ms	44444 KiB

nekameleoni

/**
 *    author:  wxhtzdy
 *    created: 28.06.2022 12:53:33
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n, k, q;
  cin >> n >> k >> q;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    --a[i];
  }
  const int inf = (int) 1e6;
  vector<int> mn(4 * n, inf);               
  vector<vector<pair<int, int>>> ll(4 * n);
  vector<vector<pair<int, int>>> rr(4 * n);
  function<void(int, int, int)> pull = [&](int node, int l, int r) {
    {
      ll[node].clear();
      long long seen = 0;
      int i = 0, j = 0;
      function<void(pair<int, int>)> Insert = [&](pair<int, int> v) {
        if (!(seen >> v.second & 1)) {
          seen = seen | (1LL << v.second);
          ll[node].push_back(v);
        }
      };
      while (i < (int) ll[node + node].size() || j < (int) ll[node + node + 1].size()) {
        if (i == (int) ll[node + node].size() || (j < (int) ll[node + node + 1].size() && ll[node + node][i].first > ll[node + node + 1][j].first)) {
          Insert(ll[node + node + 1][j++]);
        } else {
          Insert(ll[node + node][i++]);
        }
      }
    }
    {
      rr[node].clear();
      long long seen = 0;
      int i = rr[node + node].size() - 1, j = (int) rr[node + node + 1].size() - 1;
      function<void(pair<int, int>)> Insert = [&](pair<int, int> v) {
        if (!(seen >> v.second & 1)) {
          seen = seen | (1LL << v.second);
          rr[node].push_back(v);
        }
      };
      while (i >= 0 || j >= 0) {
        if (i < 0 || (j >= 0 && rr[node + node][i].first < rr[node + node + 1][j].first)) {
          Insert(rr[node + node + 1][j--]);
        } else {
          Insert(rr[node + node][i--]);
        }
      }
      reverse(rr[node].begin(), rr[node].end());
    }
    mn[node] = min(mn[node + node], mn[node + node + 1]);
    vector<int> cnt(k);
    int d = 0;
    function<void(int)> Add = [&](int x) {
      if (cnt[x] == 0) {
        d += 1;
      }
      cnt[x] += 1;
    };
    function<void(int)> Rem = [&](int x) {
      cnt[x] -= 1;
      if (cnt[x] == 0) {
        d -= 1;
      }
    };
    for (auto& p : rr[node + node]) {
      Add(p.second);
    }
    int ptr = 0;
    for (auto& p : rr[node + node]) {
      while (ptr < (int) ll[node + node + 1].size() && d < k) {
        Add(ll[node + node + 1][ptr].second);
        ptr += 1;  
      }
      if (d == k) {
        int b = (ptr == 0 ? rr[node + node].back().first : ll[node + node + 1][ptr - 1].first);
        mn[node] = min(mn[node], b - p.first + 1);
      }               
      Rem(p.second);
    }
  };
  function<void(int, int, int)> build = [&](int node, int l, int r) {
    if (l == r) {
      ll[node].clear();
      rr[node].clear();
      ll[node].emplace_back(l, a[l]);
      rr[node].emplace_back(r, a[r]);
      mn[node] = (k == 1 ? 1 : inf);
      return;
    }
    int mid = l + r >> 1;
    build(node + node, l, mid);
    build(node + node + 1, mid + 1, r);
    pull(node, l, r);                                              
  };
  function<void(int, int, int, int)> modify = [&](int node, int l, int r, int i) {
    if (l == r) {
      ll[node].clear();
      rr[node].clear();
      ll[node].emplace_back(l, a[l]);
      rr[node].emplace_back(r, a[r]);
      mn[node] = (k == 1 ? 1 : inf);
      return;
    }
    int mid = l + r >> 1;
    if (i <= mid) {
      modify(node + node, l, mid, i);
    } else {
      modify(node + node + 1, mid + 1, r, i);
    }
    pull(node, l, r);
  };
  build(1, 0, n - 1);
  while (q--) {
    int op;
    cin >> op;
    if (op == 1) {
      int i, v;
      cin >> i >> v;
      --i; --v;
      a[i] = v;
      modify(1, 0, n - 1, i);
    } else {   
      cout << (mn[1] >= inf ? -1 : mn[1]) << '\n';
    }
  }                                                        
  return 0;
}

Compilation message (stderr)

nekameleoni.cpp: In lambda function:
nekameleoni.cpp:101:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  101 |     int mid = l + r >> 1;
      |               ~~^~~
nekameleoni.cpp: In lambda function:
nekameleoni.cpp:115:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  115 |     int mid = l + r >> 1;
      |               ~~^~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14