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Submission #518723

# Submission time Handle Problem Language Result Execution time Memory
518723 2022-01-24T13:46:31 Z zhangjishen Global Warming (CEOI18_glo) C++
100 / 100
 65 ms 3412 KB 
#include<bits/stdc++.h>
using namespace std;

#define mp make_pair
#define pb push_back
#define fi first
#define se second
template<typename T> bool chkmin(T &a, T b){return b < a ? a = b, 1 : 0;}
template<typename T> bool chkmax(T &a, T b){return b > a ? a = b, 1 : 0;}
const int inf = 2e9 + 10, MAXN = 2e5 + 10;

int n, x, a[MAXN], f[MAXN], L[MAXN], R[MAXN];
int main(){
	// input
	scanf("%d %d", &n, &x);
	for(int i = 1; i <= n; i++)
		scanf("%d", &a[i]);
	// L
	for(int i = 1; i <= n; i++)
		f[i] = inf;
	for(int i = 1; i <= n; i++){
		L[i] = lower_bound(f + 1, f + 1 + n, a[i] + x) - f;
		int j = lower_bound(f + 1, f + 1 + n, a[i]) - f;
		f[j] = a[i];
	}
	// R
	for(int i = 1; i <= n; i++)
		f[i] = inf;
	for(int i = n; i >= 1; i--){	// LDS of reverse = LIS of - reverse
		R[i] = lower_bound(f + 1, f + 1 + n, -a[i]) - f;
		f[R[i]] = -a[i];
	}
	// ans
	int ans = 0;
	for(int i = 1; i <= n; i++)
		chkmax(ans, L[i] + R[i] - 1);
	printf("%d\n", ans);
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%d %d", &n, &x);
      |  ~~~~~^~~~~~~~~~~~~~~~~
glo.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 368 KB Output is correct
22 Correct 2 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 3296 KB Output is correct
2 Correct 54 ms 3412 KB Output is correct
3 Correct 60 ms 3352 KB Output is correct
4 Correct 57 ms 3360 KB Output is correct
5 Correct 47 ms 3408 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 1076 KB Output is correct
2 Correct 12 ms 1100 KB Output is correct
3 Correct 13 ms 1100 KB Output is correct
4 Correct 11 ms 1100 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 13 ms 1100 KB Output is correct
7 Correct 10 ms 972 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1788 KB Output is correct
2 Correct 25 ms 1748 KB Output is correct
3 Correct 65 ms 3316 KB Output is correct
4 Correct 41 ms 3364 KB Output is correct
5 Correct 23 ms 1880 KB Output is correct
6 Correct 36 ms 3184 KB Output is correct
7 Correct 36 ms 3196 KB Output is correct
8 Correct 20 ms 1868 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 368 KB Output is correct
22 Correct 2 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 54 ms 3296 KB Output is correct
28 Correct 54 ms 3412 KB Output is correct
29 Correct 60 ms 3352 KB Output is correct
30 Correct 57 ms 3360 KB Output is correct
31 Correct 47 ms 3408 KB Output is correct
32 Correct 12 ms 1076 KB Output is correct
33 Correct 12 ms 1100 KB Output is correct
34 Correct 13 ms 1100 KB Output is correct
35 Correct 11 ms 1100 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 13 ms 1100 KB Output is correct
38 Correct 10 ms 972 KB Output is correct
39 Correct 26 ms 1788 KB Output is correct
40 Correct 25 ms 1748 KB Output is correct
41 Correct 65 ms 3316 KB Output is correct
42 Correct 41 ms 3364 KB Output is correct
43 Correct 23 ms 1880 KB Output is correct
44 Correct 36 ms 3184 KB Output is correct
45 Correct 36 ms 3196 KB Output is correct
46 Correct 20 ms 1868 KB Output is correct
47 Correct 25 ms 1868 KB Output is correct
48 Correct 28 ms 1836 KB Output is correct
49 Correct 55 ms 3352 KB Output is correct
50 Correct 40 ms 3404 KB Output is correct
51 Correct 40 ms 2628 KB Output is correct
52 Correct 42 ms 3412 KB Output is correct
53 Correct 34 ms 3332 KB Output is correct
54 Correct 55 ms 3296 KB Output is correct
55 Correct 45 ms 3396 KB Output is correct