Submission #219589

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
219589	2020-04-05T16:27:11 Z	GioChkhaidze	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2000 ms	118524 KB

lightningrod

#include <bits/stdc++.h>
using namespace std;
const int N=1e7+7;
bool f[N];
int n,x,y,X[N],Y[N],st[N],sts;

inline void fastscan(int &number)  { 
  register int c; 
  number = 0; 
  c = getchar(); 
  for (; (c>47 && c<58); c=getchar()) 
      number = number *10 + c - 48; 
} 

main () {
	fastscan(n);
	for (int i=1; i<=n; i++) {
		fastscan(x);
		fastscan(y);
		X[i]=x-y;
		Y[i]=x+y;
	}
	
	for (int i=1; i<=n; i++) {
		if (sts) {
			while (sts && X[st[sts]]>=X[i]) {
				f[st[sts]]=1;
				--sts;
			}
		}
		st[++sts]=i;
	}

	sts=0;
	
	for (int i=n; i>=1; i--) {
		if (f[i]) continue;
		if (sts) {
			while (sts && Y[st[sts]]<=Y[i]) {
				--sts;
			}
		}
		st[++sts]=i;
	}
	cout<<sts;
}

Compilation message

lightningrod.cpp:15:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^

Subtask #1

4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1456 ms	116196 KB	Output is correct
2	Correct	1450 ms	114380 KB	Output is correct
3	Correct	1398 ms	111224 KB	Output is correct

Subtask #2

7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	4 ms	384 KB	Output is correct
6	Correct	4 ms	384 KB	Output is correct
7	Correct	4 ms	384 KB	Output is correct

Subtask #3

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	4 ms	384 KB	Output is correct
6	Correct	4 ms	384 KB	Output is correct
7	Correct	4 ms	384 KB	Output is correct
8	Correct	5 ms	384 KB	Output is correct
9	Correct	5 ms	384 KB	Output is correct
10	Correct	4 ms	384 KB	Output is correct

Subtask #4

21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	4 ms	384 KB	Output is correct
6	Correct	4 ms	384 KB	Output is correct
7	Correct	4 ms	384 KB	Output is correct
8	Correct	5 ms	384 KB	Output is correct
9	Correct	5 ms	384 KB	Output is correct
10	Correct	4 ms	384 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	5 ms	512 KB	Output is correct
13	Correct	5 ms	384 KB	Output is correct

Subtask #5

26.0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	4 ms	384 KB	Output is correct
6	Correct	4 ms	384 KB	Output is correct
7	Correct	4 ms	384 KB	Output is correct
8	Correct	5 ms	384 KB	Output is correct
9	Correct	5 ms	384 KB	Output is correct
10	Correct	4 ms	384 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	5 ms	512 KB	Output is correct
13	Correct	5 ms	384 KB	Output is correct
14	Correct	51 ms	3064 KB	Output is correct
15	Correct	50 ms	3192 KB	Output is correct
16	Correct	42 ms	3576 KB	Output is correct

Subtask #6

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1361 ms	118524 KB	Output is correct
2	Correct	1363 ms	117240 KB	Output is correct
3	Correct	1343 ms	114784 KB	Output is correct

Subtask #7

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1456 ms	116196 KB	Output is correct
2	Correct	1450 ms	114380 KB	Output is correct
3	Correct	1398 ms	111224 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	5 ms	384 KB	Output is correct
6	Correct	5 ms	384 KB	Output is correct
7	Correct	5 ms	384 KB	Output is correct
8	Correct	4 ms	384 KB	Output is correct
9	Correct	4 ms	384 KB	Output is correct
10	Correct	4 ms	384 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	5 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	5 ms	384 KB	Output is correct
15	Correct	5 ms	512 KB	Output is correct
16	Correct	5 ms	384 KB	Output is correct
17	Correct	51 ms	3064 KB	Output is correct
18	Correct	50 ms	3192 KB	Output is correct
19	Correct	42 ms	3576 KB	Output is correct
20	Correct	1361 ms	118524 KB	Output is correct
21	Correct	1363 ms	117240 KB	Output is correct
22	Correct	1343 ms	114784 KB	Output is correct
23	Execution timed out	2086 ms	100052 KB	Time limit exceeded
24	Halted	0 ms	0 KB	-