Submission #979189

#	Time	Username	Problem	Language	Result	Execution time	Memory
979189		duckindog	Lottery (CEOI18_lot)	C++17	100 / 100	818 ms	8672 KiB

lot

#include <bits/stdc++.h>

using namespace std;

const int N = 10'000 + 10;
int n, l;
int a[N];
int q;
int Q[N];

int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);

  cin >> n >> l;
  for (int i = 1; i <= n; ++i) cin >> a[i];
  cin >> q;
  for (int i = 1; i <= q; ++i) cin >> Q[i];

  vector<int> rrh(Q + 1, Q + q + 1);
  sort(rrh.begin(), rrh.end());
  rrh.resize(unique(rrh.begin(), rrh.end()) - rrh.begin());

  vector<vector<int>> f(n + 2, vector<int> (rrh.size() + 2));

  for (int i = 2; i <= n - l + 1; ++i) {
    int sum = 0;
    for (int j = 1; j <= l; ++j) sum += a[i + j - 1] != a[j];
    int cnt = 0;
    {
      int it = lower_bound(rrh.begin(), rrh.end(), sum) - rrh.begin() + 1;
      f[i + cnt][it] += 1;
      f[1 + cnt][it] += 1;
    }

    for (int j = l + 1; j <= n; ++j) { 
      if (i + cnt + l > n) break;
      
      sum -= a[i + cnt] != a[1 + cnt];
      cnt += 1;
      sum += a[i + cnt + l - 1] != a[cnt + l];
      
      int it = lower_bound(rrh.begin(), rrh.end(), sum) - rrh.begin() + 1;
      f[i + cnt][it] += 1;
      f[1 + cnt][it] += 1;
    }
  }

  for (int i = 1; i <= n; ++i) { 
    for (int j = 1; j <= rrh.size(); ++j) f[i][j] += f[i][j - 1];
  }

  for (int i = 1; i <= q; ++i) { 
    int it = lower_bound(rrh.begin(), rrh.end(), Q[i]) - rrh.begin() + 1;
    for (int j = 1; j <= n - l + 1; ++j) cout << f[j][it] << " \n"[j == n - l + 1];
  }
}

Compilation message (stderr)

lot.cpp: In function 'int32_t main()':
lot.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int j = 1; j <= rrh.size(); ++j) f[i][j] += f[i][j - 1];
      |                     ~~^~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20