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Submission #712095

# Submission time Handle Problem Language Result Execution time Memory
712095 2023-03-18T06:18:39 Z Pherokung Lightning Rod (NOI18_lightningrod) C++14
80 / 100
 2000 ms 262144 KB 
#include<bits/stdc++.h>
using namespace std;
#define MAXN 10000005
#define F first
#define S second
int n,x[MAXN],y[MAXN],rod[MAXN],ans=0;
deque<int> dq;
bool oper(pair<int,int> i,pair<int,int> j){
	return i.F > j.F;
}

int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d%d",&x[i],&y[i]);
		rod[i] = 1;
	}

	for(int i=1;i<=n;i++){
		while(!dq.empty()){
			int p = dq.front();
			if(y[i] - x[i] >= y[p] - x[p]){
				rod[p] = 0;
				dq.pop_front();
			}
			else break;
		}
		dq.push_front(i);
	}
	while(!dq.empty()) dq.pop_front();
	
	for(int i=n;i>=1;i--){
		while(!dq.empty()){
			int p = dq.front();
			if(y[i] + x[i] >= y[p] + x[p]){
				rod[p] = 0;
				dq.pop_front();
			}
			else break;
		}
		dq.push_front(i);
	}
	while(!dq.empty()) dq.pop_front();
	
	for(int i=1;i<=n;i++) ans += rod[i];
	
	printf("%d",ans);
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
lightningrod.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d%d",&x[i],&y[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1563 ms 262144 KB Output is correct
2 Correct 1580 ms 262144 KB Output is correct
3 Correct 1505 ms 258424 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 0 ms 212 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 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 0 ms 212 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 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 0 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 0 ms 212 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 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 0 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 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 0 ms 212 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 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 0 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 46 ms 2436 KB Output is correct
15 Correct 39 ms 2516 KB Output is correct
16 Correct 33 ms 2880 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1595 ms 244068 KB Output is correct
2 Correct 1649 ms 243792 KB Output is correct
3 Correct 1568 ms 237888 KB Output is correct

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1563 ms 262144 KB Output is correct
2 Correct 1580 ms 262144 KB Output is correct
3 Correct 1505 ms 258424 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 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 1 ms 212 KB Output is correct
10 Correct 1 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 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 46 ms 2436 KB Output is correct
18 Correct 39 ms 2516 KB Output is correct
19 Correct 33 ms 2880 KB Output is correct
20 Correct 1595 ms 244068 KB Output is correct
21 Correct 1649 ms 243792 KB Output is correct
22 Correct 1568 ms 237888 KB Output is correct
23 Execution timed out 2102 ms 259452 KB Time limit exceeded
24 Halted 0 ms 0 KB -