Submission #659399

#	Time	Username	Problem	Language	Result	Execution time	Memory
659399		600Mihnea	The short shank; Redemption (BOI21_prison)	C++17	Compilation error	0 ms	0 KiB

prison

#pragma GCC optimize("O1")
#include <bits/stdc++.h>

using namespace std;

const int N = 2000000 + 7;
const int INF = (int) 1e9 + 7;
int n;
int d;
int t;
int trebel[N];
bool block[N];
int ant[N];
bool valid[N]
pair<int, int> tree_min_valid[4 * N];

void st_valid(int v, int tl, int tr, int i, int x) {
  if (tr < i || i < tl) {
    return;
  }
  if (tl == tr) {
    tree_min_valid[v] = {x, i};
    return;
  }
  int tm = (tl + tr) / 2;
  st_valid(2 * v, tl, tm, i, x);
  st_valid(2 * v + 1, tm + 1, tr, i, x);
  tree_min_valid[v] = min(tree_min_valid[2 * v], tree_min_valid[2 * v + 1]);
}

pair<int, int> get_min_valid(int v, int tl, int tr, int l, int r) {
  if (tr < l || r < tl) {
    return {INF, -1};
  }
  if (l <= tl && tr <= r) {
    return tree_min_valid[v];
  }
  int tm = (tl + tr) / 2;
  return min(get_min_valid(2 * v, tl, tm, l, r), get_min_valid(2 * v + 1, tm + 1, tr, l, r));
}

pair<int, int> tree[4 * N];
int lazy[4 * N];

void add(int v, int tl, int tr, int l, int r, int x) {
  if (lazy[v]) {
    tree[v].first += lazy[v];
    if (tl < tr) {
      lazy[2 * v] += lazy[v];
      lazy[2 * v + 1] += lazy[v];
    }
    lazy[v] = 0;
  }
  if (tr < l || r < tl) {
    return;
  }
  if (l <= tl && tr <= r) {
    tree[v].first += x;
    if (tl < tr) {
      lazy[2 * v] += x;
      lazy[2 * v + 1] += x;
    }
    return;
  }
  int tm = (tl + tr) / 2;
  add(2 * v, tl, tm, l, r, x);
  add(2 * v + 1, tm + 1, tr, l, r, x);
  tree[v] = max(tree[2 * v], tree[2 * v + 1]);
}

void build(int v, int tl, int tr) {
  if (tl == tr) {
    tree[v] = {0, tl};
  } else {
    int tm = (tl + tr) / 2;
    build(2 * v, tl, tm);
    build(2 * v + 1, tm + 1, tr);
    tree[v] = max(tree[2 * v], tree[2 * v + 1]);
  }
}

int main() {
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

  for (int i = 0; i < 4 * N; i++) {
    tree_min_valid[i] = {INF, -1};
  }

  cin >> n >> d >> t;
  for (int i = 1; i <= n; i++) {
    cin >> trebel[i];
  }
  build(1, 1, n - 1);
  vector<int> stk;
  for (int i = 1; i <= n; i++) {
    while (!stk.empty() && trebel[stk.back()] - stk.back() >= trebel[i] - i) {
      stk.pop_back();
    }
    stk.push_back(i);
    int L = 0, R = (int) stk.size() - 1;
    while (L <= R) {
      int mid = (L + R) / 2;
      int j = stk[mid];
      if (trebel[j] + i - j <= t) {
        ant[i] = j;
        L = mid + 1;
      } else {
        R = mid - 1;
      }
    }
  }
  for (int i = 1; i <= n; i++) {
    valid[i] = (ant[i] > 0);
    if (valid[i]) {
      st_valid(1, 1, n, i, ant[i]);
    }
  }
  for (int j = 1; j <= n; j++) {
    if (valid[j]) {
      add(1, 1, n - 1, ant[j], j, +1);
    }
  }

  for (int iqd = 1; iqd <= d; iqd++) {
    int jj = tree[1].second;
    add(1, 1, n - 1, jj, jj, -(int) 1e9);
    block[jj] = 1;
    while (1) {
      auto it = get_min_valid(1, 1, n, jj + 1, n);
      int j = it.second;
      if (it.first <= jj) {
        valid[j] = 0;
        if (ant[j] <= j - 1) {
          add(1, 1, n - 1, ant[j], j - 1, -1);
        }
        st_valid(1, 1, n, j, INF);
      } else {
        break;
      }
    }
  }
  int sol = 0;
  for (int i = 1; i <= n; i++) {
    sol += valid[i];
  }
  cout << sol << "\n";

  return 0;
}

Compilation message (stderr)

prison.cpp:15:1: error: expected initializer before 'pair'
   15 | pair<int, int> tree_min_valid[4 * N];
      | ^~~~
prison.cpp: In function 'void st_valid(int, int, int, int, int)':
prison.cpp:22:5: error: 'tree_min_valid' was not declared in this scope
   22 |     tree_min_valid[v] = {x, i};
      |     ^~~~~~~~~~~~~~
prison.cpp:28:3: error: 'tree_min_valid' was not declared in this scope
   28 |   tree_min_valid[v] = min(tree_min_valid[2 * v], tree_min_valid[2 * v + 1]);
      |   ^~~~~~~~~~~~~~
prison.cpp: In function 'std::pair<int, int> get_min_valid(int, int, int, int, int)':
prison.cpp:36:12: error: 'tree_min_valid' was not declared in this scope; did you mean 'get_min_valid'?
   36 |     return tree_min_valid[v];
      |            ^~~~~~~~~~~~~~
      |            get_min_valid
prison.cpp: In function 'int main()':
prison.cpp:86:5: error: 'tree_min_valid' was not declared in this scope; did you mean 'get_min_valid'?
   86 |     tree_min_valid[i] = {INF, -1};
      |     ^~~~~~~~~~~~~~
      |     get_min_valid
prison.cpp:113:5: error: 'valid' was not declared in this scope
  113 |     valid[i] = (ant[i] > 0);
      |     ^~~~~
prison.cpp:119:9: error: 'valid' was not declared in this scope
  119 |     if (valid[j]) {
      |         ^~~~~
prison.cpp:132:9: error: 'valid' was not declared in this scope
  132 |         valid[j] = 0;
      |         ^~~~~
prison.cpp:144:12: error: 'valid' was not declared in this scope
  144 |     sol += valid[i];
      |            ^~~~~