Submission #1090869

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1090869	2024-09-19 01:09:19	vjudge1	Safety (NOI18_safety)	C++17	100 / 100	156 ms	21064 KiB

safety

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#include <cassert>
#include <iostream>
#include <set>
#include <vector>
int main() {
  std::cin.tie(NULL)->sync_with_stdio(false);
  
  int n, h;
  std::cin >> n >> h;
  std::vector<int> m(2, 0);
  std::vector<long long> x_shift(2, 0);
  std::vector<long long> c(2, 0);
  x_shift[0] = h, x_shift[1] = -h;
  std::multiset<long long> m_changes[2]; // xpos for each m changes +1
  for (int i = 0; i < n; i++) {
    long long x;
    std::cin >> x;
    // shift by h
    x_shift[0] -= h;
    x_shift[1] += h;
    c[0] += 1LL * m[0] * h;
    c[1] -= 1LL * m[1] * h;
    // append to line
    m[0]--;
    m[1]++;
    m_changes[0].insert(x - x_shift[0]);
 
 
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