oj.uz

Submission #514976

# Submission time Handle Problem Language Result Execution time Memory
514976 2022-01-19T00:06:50 Z CrouchingDragon Safety (NOI18_safety) C++17
0 / 100
 18 ms 5412 KB 
#include <bits/stdc++.h>

template <typename T>
using minpq = std::priority_queue<T, std::vector<T>, std::greater<T>>;

constexpr int64_t inf = std::numeric_limits<int64_t>::max() / 2;

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);
  int N, H;
  std::cin >> N >> H;
  std::vector<int> S(N);
  for (int i = 0; i < N; ++i) {
    std::cin >> S[i];
  }
  std::priority_queue<int64_t> left;
  minpq<int64_t> right;
  left.push(-inf);
  right.push(+inf);
  int64_t cost = 0, offset = 0;
  for (int i = 0; i < N; ++i) {
    int64_t x = S[i];
    int64_t l = left.top() - offset, r = right.top() + offset;
    if (l <= x && x <= r) {
      left.push(x + offset);
      right.push(x - offset);
    } else if (x < l) {
      cost += l - x;
      left.push(x + offset);
      right.push(l - offset);
    } else {
      cost += x - r;
      left.push(r + offset);
      right.push(x - offset);
    }
    assert(left.top() - offset <= right.top() + offset);
    offset += H;
  }
  std::cout << cost << '\n';
  exit(0);
}

Subtask #1
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 5412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Incorrect 1 ms 208 KB Output isn't correct
4 Halted 0 ms 0 KB -