Submission #272675

#	Time	Username	Problem	Language	Result	Execution time	Memory
272675		Haunted_Cpp	A Game with Grundy (CCO20_day1problem1)	C++17	0 / 25	1 ms	384 KiB

Main

/**
 *  author: Haunted_Cpp
**/
 
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
template<typename T> ostream &operator << (ostream &os, const vector<T> &v) { os << '{'; string sep; for (const auto &x : v) os << sep << x, sep = ", "; return os << '}'; }
template<typename T, size_t size> ostream &operator << (ostream &os, const array<T, size> &arr) { os << '{'; string sep; for (const auto &x : arr) os << sep << x, sep = ", "; return os << '}'; }
template<typename A, typename B> ostream &operator << (ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
 
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
 
#ifdef LOCAL
#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#else
#define debug(...) 47
#endif

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0); 
  int n;
  cin >> n;
  int l, r, y;
  cin >> l >> r >> y;
  multiset<pair<double, int>> sweep;
  auto get_intersection = [&](int x, double slope) {
    double b = - slope * x;
    return (y - b) / slope;
  };
  auto is_integer = [&](double cur) {
    if (cur == l || cur == r) return false;
    int tst = cur;
    return cur == tst;
  };
  for (int i = 0; i < n; i++) {
    int x, vi, hi;
    cin >> x >> vi >> hi;
    double slope = 1.0 * vi / hi;
    sweep.insert({get_intersection(x, slope), 1});
    sweep.insert({get_intersection(x, - slope), 0});
  }
  int how_many = 0;
  sweep.insert({r, 1});
  map<int, double> cnt;
  double ant = l;
  for (auto to : sweep) {
    int hi = floor(to.first);
    int lo = ceil(ant);
    const int add = hi - lo + 1 - (is_integer(ant) && is_integer(to.first) ? 2 : 0);
    cnt[how_many] += add;
    if (to.second == 0) ++how_many;
    if (to.second == 1) --how_many;
    ant = to.first;
  }
  long long s = 0;
  for (int i = 0; i <= n; i++) {
    s += cnt[i];
    cout << s << '\n';
  }
  return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10