oj.uz

Submission #146587

# Submission time Handle Problem Language Result Execution time Memory
146587 2019-08-24T15:21:24 Z gs14004 Safety (NOI18_safety) C++17
100 / 100
 82 ms 6292 KB 
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pi = pair<int, int>;
const int MAXN = 250005;

int n, h, x[MAXN], y[MAXN];

struct pque{
	bool neg;
	lint offset = 0;
	priority_queue<lint> pq;
	void push(lint x){
		if(neg) x = -x;
		pq.push(x - offset);
	}
	lint top(){
		lint x = pq.top() + offset;
		if(neg) x = -x;
		return x;
	}
	void pop(){
		pq.pop();
	}
	void add_offset(lint x){
		if(neg) x = -x;
		offset += x;
	}
}pql, pqr;

int main(){
	scanf("%d %d",&n,&h);
	lint ans = 0;
	pqr.neg = 1;
	for(int i=0; i<n; i++){
		scanf("%d",&x[i]);
		y[i] = h;
		if(i > 0){
			pql.add_offset(-y[i]);
			pqr.add_offset(y[i - 1]);
			if(pqr.top() < x[i]){
				ans += x[i] - pqr.top();
				pqr.push(x[i]);
				pqr.push(x[i]);
				pql.push(pqr.top());
				pqr.pop();
			}
			else if(pql.top() > x[i]){
				ans += pql.top() - x[i];
				pql.push(x[i]);
				pql.push(x[i]);
				pqr.push(pql.top());
				pql.pop();
			}
			else{
				pql.push(x[i]);
				pqr.push(x[i]);
			}
		}
		else{
			pql.push(x[i]);
			pqr.push(x[i]);
		}
	}
	cout << ans << endl;
}

Compilation message

safety.cpp: In function 'int main()':
safety.cpp:32:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&h);
  ~~~~~^~~~~~~~~~~~~~~
safety.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x[i]);
   ~~~~~^~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 5776 KB Output is correct
2 Correct 77 ms 6056 KB Output is correct
3 Correct 81 ms 6144 KB Output is correct

Subtask #5
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 380 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 380 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct

Subtask #7
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 380 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 4 ms 504 KB Output is correct
29 Correct 4 ms 504 KB Output is correct
30 Correct 4 ms 504 KB Output is correct
31 Correct 3 ms 376 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 3 ms 500 KB Output is correct
34 Correct 3 ms 504 KB Output is correct

Subtask #8
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 380 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 4 ms 504 KB Output is correct
35 Correct 4 ms 504 KB Output is correct
36 Correct 4 ms 504 KB Output is correct
37 Correct 3 ms 376 KB Output is correct
38 Correct 3 ms 504 KB Output is correct
39 Correct 3 ms 500 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 5 ms 632 KB Output is correct
42 Correct 4 ms 504 KB Output is correct
43 Correct 4 ms 636 KB Output is correct
44 Correct 4 ms 636 KB Output is correct
45 Correct 3 ms 632 KB Output is correct
46 Correct 3 ms 632 KB Output is correct

Subtask #9
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 55 ms 5776 KB Output is correct
20 Correct 77 ms 6056 KB Output is correct
21 Correct 81 ms 6144 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 380 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 4 ms 504 KB Output is correct
38 Correct 4 ms 504 KB Output is correct
39 Correct 4 ms 504 KB Output is correct
40 Correct 3 ms 376 KB Output is correct
41 Correct 3 ms 504 KB Output is correct
42 Correct 3 ms 500 KB Output is correct
43 Correct 3 ms 504 KB Output is correct
44 Correct 5 ms 632 KB Output is correct
45 Correct 4 ms 504 KB Output is correct
46 Correct 4 ms 636 KB Output is correct
47 Correct 4 ms 636 KB Output is correct
48 Correct 3 ms 632 KB Output is correct
49 Correct 3 ms 632 KB Output is correct
50 Correct 81 ms 6292 KB Output is correct
51 Correct 71 ms 5772 KB Output is correct
52 Correct 52 ms 5880 KB Output is correct
53 Correct 66 ms 6096 KB Output is correct
54 Correct 82 ms 6136 KB Output is correct
55 Correct 47 ms 5856 KB Output is correct
56 Correct 48 ms 5872 KB Output is correct
57 Correct 53 ms 5856 KB Output is correct
58 Correct 48 ms 5604 KB Output is correct
59 Correct 67 ms 5948 KB Output is correct