Submission #800968

#	Time	Username	Problem	Language	Result	Execution time	Memory
800968		abczz	이상한 기계 (APIO19_strange_device)	C++17	100 / 100	1194 ms	69040 KiB

strange_device

#include <iostream>
#include <numeric>
#include <array>
#include <algorithm>
#include <vector>
#define ll long long

using namespace std;

ll n, a, b, l, r, x, y, z;
string S;
vector <array<__int128, 2>> V;
__int128 cl, cr, k, p, f;

void print(__int128 v) {
  S.clear();
  while (v) {
    S.push_back(char('0'+v%10));
    v /= 10;
  }
  if (S.empty()) S.push_back('0');
  reverse(S.begin(), S.end());
  cout << S << '\n';
}
int main() {
  cin >> n >> a >> b;
  x = (b+1)%a, y = a;
  z = gcd(x, y);
  k = y/z;
  k *= b;
  for (int i=0; i<n; ++i) {
    cin >> l >> r;
    cl = l, cr = r;
    cr = min(cl+k-1, cr);
    cl %= k;
    cr %= k;
    if (cl > cr) {
      V.push_back({cl, k-1});
      V.push_back({0, cr});
    }
    else V.push_back({cl, cr});
  }
  sort(V.begin(), V.end());
  p = -1;
  for (auto [l, r] : V) {
    if (l <= p && p <= r) {
      f += r-p;
    }
    else if (p < l) {
      f += r-l+1;
    }
    p = max(p, r);
  }
  print(f);
}

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30