답안 #668632

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
668632	2022-12-04T10:05:43 Z	600Mihnea	Lightning Rod (NOI18_lightningrod)	C++17	100 / 100	356 ms	76360 KB

lightningrod

#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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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