oj.uz

Submission #373837

# Submission time Handle Problem Language Result Execution time Memory
373837 2021-03-05T21:44:46 Z guka415 Lightning Rod (NOI18_lightningrod) C++14
66 / 100
 2000 ms 76104 KB 
#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
#include <algorithm>

using namespace std;
typedef pair<int, int> pii;

const int sz = 1e7 + 5;
int n;
int p[sz][2];
int mxx[sz], mny[sz];

int main() {
	int xp, yp, ret = 0, mx = -2e9;
	scanf("%d", &n);
	for (int i = 0; i < n; i++) {
		scanf("%d %d", &xp, &yp);
		p[i][0] = xp + yp;
		p[i][1] = xp - yp;
	}
	mxx[0] = p[0][0];
	for (int i = 1; i < n; i++)
		mxx[i] = (mxx[i - 1] < p[i][0] ? p[i][0] : mxx[i - 1]);
	mny[n - 1] = p[n - 1][1];
	for (int i = n - 2; i >= 0; i--)
		mny[i] = (mny[i + 1] > p[i][1] ? p[i][1] : mny[i + 1]);
	for (int i = 1; i < n - 1; i++)
		ret += (mxx[i - 1]<p[i][0] && mny[i + 1]>p[i][1]);
	ret += (mny[1] > p[0][1]);
	ret += (mxx[n - 2] < p[n - 1][0]);
	printf("%d", ret);
	return 0;
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:15:23: warning: unused variable 'mx' [-Wunused-variable]
   15 |  int xp, yp, ret = 0, mx = -2e9;
      |                       ^~
lightningrod.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
lightningrod.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |   scanf("%d %d", &xp, &yp);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2032 ms 72872 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 53 ms 3200 KB Output is correct
15 Correct 62 ms 3436 KB Output is correct
16 Correct 47 ms 3308 KB Output is correct

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2055 ms 76104 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2032 ms 72872 KB Time limit exceeded
2 Halted 0 ms 0 KB -