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Submission #668632

# Submission time Handle Problem Language Result Execution time Memory
668632 2022-12-04T10:05:43 Z 600Mihnea Lightning Rod (NOI18_lightningrod) C++17
100 / 100
 356 ms 76360 KB 
#include <bits/stdc++.h>


using namespace std;

inline void read(int& x) {
    x = 0;
    char ch = getchar_unlocked();
    while (ch&16){
		x = (x << 3) + (x << 1) + (ch&15);
		ch = getchar_unlocked();
	}
}


struct T
{
  int x;
  int y;
};

bool eat(T a, T b)
{
  return a.x <= b.x && a.y <= b.y;
}

signed main()
{
  int n;
  read(n);
  vector<T> stk;
  stk.reserve(n);
  for (int i = 1; i <= n; i++)
  {
    int x, y;
    read(x);
    read(y);
    T cur = {-x - y, x - y};
    if (stk.empty())
    {
      stk.push_back(cur);
    }
    else
    {
      if (eat(stk.back(), cur))
      {
        continue;
      }
      while (!stk.empty() && eat(cur, stk.back()))
      {
        stk.pop_back();
      }
      stk.push_back(cur);
    }
  }
  cout << (int) stk.size() << "\n";
  return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 201 ms 76360 KB Output is correct
2 Correct 208 ms 76212 KB Output is correct
3 Correct 186 ms 74156 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 340 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 9 ms 588 KB Output is correct
15 Correct 9 ms 752 KB Output is correct
16 Correct 8 ms 1284 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 49428 KB Output is correct
2 Correct 203 ms 49300 KB Output is correct
3 Correct 197 ms 48148 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 201 ms 76360 KB Output is correct
2 Correct 208 ms 76212 KB Output is correct
3 Correct 186 ms 74156 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 296 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 308 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 9 ms 588 KB Output is correct
18 Correct 9 ms 752 KB Output is correct
19 Correct 8 ms 1284 KB Output is correct
20 Correct 198 ms 49428 KB Output is correct
21 Correct 203 ms 49300 KB Output is correct
22 Correct 197 ms 48148 KB Output is correct
23 Correct 356 ms 588 KB Output is correct
24 Correct 314 ms 404 KB Output is correct
25 Correct 282 ms 3000 KB Output is correct