Submission #710853

#	Time	Username	Problem	Language	Result	Execution time	Memory
710853		awu	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2104 ms	156752 KiB

Main

#include <bits/extc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")

#define int long long
#define f first
#define s second
#define all(x) x.begin(), x.end()
#define debug(x) do{auto y = x; cout << #x << " = " << y << endl;}while(0)
// #define endl "\n"
#define unordered_map __gnu_pbds::gp_hash_table
using pii = pair<int, int>;

const int inf = 1ll << 60;
const int MOD = 1e9 + 7;

signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n; cin >> n;
  vector<pii> pts(n);
#pragma GCC ivdep
  for(int i = 0; i < n; i++) {
    int x, y; cin >> x >> y;
    pts[i] = {x - y, -(x + y)};
  }
  sort(all(pts));
  int hi = -inf;
  int ans = 0;
  for(auto p : pts) {
    p.s *= -1;
    if(p.s > hi) {
      hi = p.s;
      ans++;
    }
  }
  cout << ans << endl;
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 0 / 20