Submission #836948

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
836948	2023-08-24T17:53:02 Z	Abrar_Al_Samit	Radio Towers (IOI22_towers)	C++17	23 / 100	4000 ms	7700 KB

towers

#include "towers.h"
#include <bits/stdc++.h>
 
using namespace std;
 
//subtask 2 & 3
 
const int nax = 100005;
int n;
bool l_maxima[nax];
int l[nax], r[nax];
int h[nax];
int pmax[nax], nmax[nax];
 
void init(int N, vector<int> H) {
  n = N;
 
  for(int i=0; i<n; ++i) h[i] = H[i]; 
}
 
bool is[nax];
int max_towers(int L, int R, int D) {
	vector<int>H;
	for(int i=L; i<=R; ++i) {
		H.push_back(h[i]);
	}
	n = R-L+1;
 
	int mn = H[0];
  	for(int i=1; i<n-1; ++i) {
    	if(H[i]>H[i-1] && H[i]>H[i+1]) {
    		l_maxima[i] = 1;
    		l[i] = H[i] - mn;
    		mn = 2e9;
    	} else {
    		mn = min(mn, H[i]);
    	}
  	}
 
 
  	int p = -1;
  	for(int i=1; i<n; ++i) if(l_maxima[i]) {
  		pmax[i] = p;
  		p = i;
  	}
  	p = n;
  	for(int i=n-1; i>0; --i) if(l_maxima[i]) {
  		nmax[i] = p;
  		p = i;
  	}
 
  	mn = H[n-1];
  	for(int i=n-2; i>0; --i) {
  		if(l_maxima[i]) {
  			r[i] = H[i] - mn;
  			mn = 2e9;
  		} else {
  			mn = min(mn, H[i]);
  		}
  	}
 
 
 
	int ret = 1;
 
	set<pair<int,int>>s;
	for(int i=1; i<n; ++i) if(l_maxima[i]) {
		s.insert(make_pair(min(l[i], r[i]), i));
		is[i] = 1;
	}
 
	while(!s.empty() && s.begin()->first<D) {
		auto [x, i] = *s.begin();
		s.erase(s.begin());
		is[i] = 0;
 
		int lmin = H[i] - l[i], rmin = H[i] - r[i];
 
		if(pmax[i]!=-1 && is[pmax[i]]) {
			s.erase(make_pair(min(l[pmax[i]], r[pmax[i]]), pmax[i]));
			r[pmax[i]] = max(r[pmax[i]], H[pmax[i]] - rmin);
			s.insert(make_pair(min(l[pmax[i]], r[pmax[i]]), pmax[i]));

			nmax[pmax[i]] = nmax[i];
		}
		if(nmax[i]!=n && is[nmax[i]]) {
			s.erase(make_pair(min(l[nmax[i]], r[nmax[i]]), nmax[i]));
			l[nmax[i]] = max(l[nmax[i]], H[nmax[i]] - lmin);
			s.insert(make_pair(min(l[nmax[i]], r[nmax[i]]), nmax[i]));

			pmax[nmax[i]] = pmax[i];
		}
	} 
	ret = max(ret, (int)s.size() + 1);
	return ret;
}

Subtask #1
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	4038 ms	2344 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #2
11.0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	336 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	1 ms	336 KB	Output is correct
5	Correct	1 ms	336 KB	Output is correct
6	Correct	1 ms	336 KB	Output is correct
7	Correct	1 ms	336 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	0 ms	208 KB	Output is correct
10	Correct	0 ms	208 KB	Output is correct
11	Correct	0 ms	208 KB	Output is correct
12	Correct	0 ms	208 KB	Output is correct
13	Correct	0 ms	208 KB	Output is correct
14	Correct	1 ms	208 KB	Output is correct
15	Correct	1 ms	336 KB	Output is correct
16	Correct	1 ms	336 KB	Output is correct
17	Correct	1 ms	336 KB	Output is correct
18	Correct	0 ms	208 KB	Output is correct
19	Correct	0 ms	208 KB	Output is correct
20	Correct	1 ms	336 KB	Output is correct
21	Correct	1 ms	336 KB	Output is correct
22	Correct	1 ms	336 KB	Output is correct
23	Correct	0 ms	336 KB	Output is correct
24	Correct	1 ms	336 KB	Output is correct
25	Correct	1 ms	336 KB	Output is correct
26	Correct	1 ms	336 KB	Output is correct
27	Correct	1 ms	336 KB	Output is correct
28	Correct	1 ms	336 KB	Output is correct
29	Correct	1 ms	336 KB	Output is correct
30	Correct	1 ms	336 KB	Output is correct
31	Correct	1 ms	336 KB	Output is correct
32	Correct	0 ms	336 KB	Output is correct
33	Correct	0 ms	336 KB	Output is correct
34	Correct	0 ms	336 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct

Subtask #3
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	336 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	1 ms	336 KB	Output is correct
5	Correct	1 ms	336 KB	Output is correct
6	Correct	1 ms	336 KB	Output is correct
7	Correct	1 ms	336 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	0 ms	208 KB	Output is correct
10	Correct	0 ms	208 KB	Output is correct
11	Correct	0 ms	208 KB	Output is correct
12	Correct	0 ms	208 KB	Output is correct
13	Correct	0 ms	208 KB	Output is correct
14	Correct	1 ms	208 KB	Output is correct
15	Correct	1 ms	336 KB	Output is correct
16	Correct	1 ms	336 KB	Output is correct
17	Correct	1 ms	336 KB	Output is correct
18	Correct	0 ms	208 KB	Output is correct
19	Correct	0 ms	208 KB	Output is correct
20	Correct	1 ms	336 KB	Output is correct
21	Correct	1 ms	336 KB	Output is correct
22	Correct	1 ms	336 KB	Output is correct
23	Correct	0 ms	336 KB	Output is correct
24	Correct	1 ms	336 KB	Output is correct
25	Correct	1 ms	336 KB	Output is correct
26	Correct	1 ms	336 KB	Output is correct
27	Correct	1 ms	336 KB	Output is correct
28	Correct	1 ms	336 KB	Output is correct
29	Correct	1 ms	336 KB	Output is correct
30	Correct	1 ms	336 KB	Output is correct
31	Correct	1 ms	336 KB	Output is correct
32	Correct	0 ms	336 KB	Output is correct
33	Correct	0 ms	336 KB	Output is correct
34	Correct	0 ms	336 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct
36	Correct	8 ms	1452 KB	Output is correct
37	Correct	17 ms	2336 KB	Output is correct
38	Correct	11 ms	1564 KB	Output is correct
39	Correct	22 ms	2460 KB	Output is correct
40	Correct	10 ms	1564 KB	Output is correct
41	Correct	38 ms	4756 KB	Output is correct
42	Correct	9 ms	1428 KB	Output is correct
43	Correct	11 ms	1440 KB	Output is correct
44	Correct	15 ms	1436 KB	Output is correct
45	Correct	15 ms	1352 KB	Output is correct
46	Correct	9 ms	1488 KB	Output is correct
47	Correct	18 ms	2332 KB	Output is correct
48	Correct	17 ms	1948 KB	Output is correct
49	Correct	10 ms	1560 KB	Output is correct
50	Correct	9 ms	1472 KB	Output is correct
51	Correct	9 ms	1456 KB	Output is correct
52	Correct	18 ms	4736 KB	Output is correct
53	Correct	21 ms	5576 KB	Output is correct
54	Correct	22 ms	5552 KB	Output is correct
55	Correct	9 ms	1980 KB	Output is correct
56	Correct	16 ms	1988 KB	Output is correct
57	Correct	38 ms	4652 KB	Output is correct
58	Correct	32 ms	4912 KB	Output is correct
59	Correct	24 ms	4672 KB	Output is correct
60	Correct	22 ms	5548 KB	Output is correct
61	Correct	34 ms	5520 KB	Output is correct
62	Correct	37 ms	5536 KB	Output is correct
63	Correct	27 ms	5528 KB	Output is correct
64	Correct	15 ms	1968 KB	Output is correct
65	Correct	10 ms	1936 KB	Output is correct
66	Correct	9 ms	1968 KB	Output is correct
67	Correct	10 ms	2080 KB	Output is correct

Subtask #4
0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	4006 ms	7700 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	4019 ms	1520 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #6
0 / 19.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	336 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	1 ms	336 KB	Output is correct
5	Correct	1 ms	336 KB	Output is correct
6	Correct	1 ms	336 KB	Output is correct
7	Correct	1 ms	336 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	0 ms	208 KB	Output is correct
10	Correct	0 ms	208 KB	Output is correct
11	Correct	0 ms	208 KB	Output is correct
12	Correct	0 ms	208 KB	Output is correct
13	Correct	0 ms	208 KB	Output is correct
14	Correct	1 ms	208 KB	Output is correct
15	Correct	1 ms	336 KB	Output is correct
16	Correct	1 ms	336 KB	Output is correct
17	Correct	1 ms	336 KB	Output is correct
18	Correct	0 ms	208 KB	Output is correct
19	Correct	0 ms	208 KB	Output is correct
20	Correct	1 ms	336 KB	Output is correct
21	Correct	1 ms	336 KB	Output is correct
22	Correct	1 ms	336 KB	Output is correct
23	Correct	0 ms	336 KB	Output is correct
24	Correct	1 ms	336 KB	Output is correct
25	Correct	1 ms	336 KB	Output is correct
26	Correct	1 ms	336 KB	Output is correct
27	Correct	1 ms	336 KB	Output is correct
28	Correct	1 ms	336 KB	Output is correct
29	Correct	1 ms	336 KB	Output is correct
30	Correct	1 ms	336 KB	Output is correct
31	Correct	1 ms	336 KB	Output is correct
32	Correct	0 ms	336 KB	Output is correct
33	Correct	0 ms	336 KB	Output is correct
34	Correct	0 ms	336 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct
36	Correct	8 ms	1452 KB	Output is correct
37	Correct	17 ms	2336 KB	Output is correct
38	Correct	11 ms	1564 KB	Output is correct
39	Correct	22 ms	2460 KB	Output is correct
40	Correct	10 ms	1564 KB	Output is correct
41	Correct	38 ms	4756 KB	Output is correct
42	Correct	9 ms	1428 KB	Output is correct
43	Correct	11 ms	1440 KB	Output is correct
44	Correct	15 ms	1436 KB	Output is correct
45	Correct	15 ms	1352 KB	Output is correct
46	Correct	9 ms	1488 KB	Output is correct
47	Correct	18 ms	2332 KB	Output is correct
48	Correct	17 ms	1948 KB	Output is correct
49	Correct	10 ms	1560 KB	Output is correct
50	Correct	9 ms	1472 KB	Output is correct
51	Correct	9 ms	1456 KB	Output is correct
52	Correct	18 ms	4736 KB	Output is correct
53	Correct	21 ms	5576 KB	Output is correct
54	Correct	22 ms	5552 KB	Output is correct
55	Correct	9 ms	1980 KB	Output is correct
56	Correct	16 ms	1988 KB	Output is correct
57	Correct	38 ms	4652 KB	Output is correct
58	Correct	32 ms	4912 KB	Output is correct
59	Correct	24 ms	4672 KB	Output is correct
60	Correct	22 ms	5548 KB	Output is correct
61	Correct	34 ms	5520 KB	Output is correct
62	Correct	37 ms	5536 KB	Output is correct
63	Correct	27 ms	5528 KB	Output is correct
64	Correct	15 ms	1968 KB	Output is correct
65	Correct	10 ms	1936 KB	Output is correct
66	Correct	9 ms	1968 KB	Output is correct
67	Correct	10 ms	2080 KB	Output is correct
68	Execution timed out	4006 ms	7700 KB	Time limit exceeded
69	Halted	0 ms	0 KB	-

Subtask #7
0 / 23.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	4038 ms	2344 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Submission #836948

Compilation message

Subtask #1 0 / 4.0

Subtask #2 11.0 / 11.0

Subtask #3 12.0 / 12.0

Subtask #4 0 / 14.0

Subtask #5 0 / 17.0

Subtask #6 0 / 19.0

Subtask #7 0 / 23.0

Subtask #1
0 / 4.0

Subtask #2
11.0 / 11.0

Subtask #3
12.0 / 12.0

Subtask #4
0 / 14.0

Subtask #5
0 / 17.0

Subtask #6
0 / 19.0

Subtask #7
0 / 23.0