oj.uz

Submission #342692

# Submission time Handle Problem Language Result Execution time Memory
342692 2021-01-02T16:18:22 Z maskoff K blocks (IZhO14_blocks) C++14
53 / 100
 1000 ms 5564 KB 
#include <bits/stdc++.h>
 
#define file ""
 
#define all(x) x.begin(), x.end()
 
#define sc second
#define fr first
 
#define pb push_back
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
 
const ll inf = 1e18 + 5;
const ll mod = 1e9 + 7;
 
const int N = 1e5 + 5;
 
int dx[] = {+1, 0, -1, 0};
int dy[] = {0, +1, 0, -1};
 
struct line {
	ll tag;
	ll ans;
	ll mx;
	ll dp;
}	t[N * 4];
 
ll a[N], l[N], n, k, dp[N]; 
 
void push(int u, int l, int r) {
 	if (l == r || t[u].tag == -1) return;
 	
 	t[u + u].mx = max(t[u].tag, t[u + u].mx);
 	t[u + u + 1].mx = max(t[u].tag, t[u + u + 1].mx);
 
 	t[u + u].ans = t[u + u].mx + t[u + u].dp;
 	t[u + u + 1].ans = t[u + u + 1].mx + t[u + u + 1].dp;
 
 	t[u + u].tag = max(t[u + u].tag, t[u].tag);
 	t[u + u + 1].tag = max(t[u + u + 1].tag, t[u].tag);

 	t[u].tag = -1;
}
 
void update_mx(int u, int ul, int ur, int l, int r, ll val) {
	push(u, ul, ur);
	if (l > ur || ul > r) return;
	if (l <= ul && ur <= r) {
	 	t[u].mx = max(t[u].mx, val);
	 	t[u].ans = t[u].mx + t[u].dp;
	 	t[u].tag = max(t[u].tag, val);
	 	push(u, ul, ur);
	 	return;
 	}
 	int um = ul + ur >> 1;
 	update_mx(u + u, ul, um, l, r, val);
 	update_mx(u + u + 1, um + 1, ur, l, r, val);
 	t[u].ans = min(t[u + u].ans, t[u + u + 1].ans); 
}
 
void update(int u, int l, int r, int pos, ll val) {	
	push(u, l, r);
	if (l == r) {
		t[u].ans = val;
		t[u].dp = val;
		return;		 	
	}
	int m = l + r >> 1;
	if (pos <= m) update(u + u, l, m, pos, val);
	else update (u + u + 1, m + 1, r, pos, val);
	t[u].ans = min(t[u + u].ans, t[u + u + 1].ans); 
	t[u].dp = min(t[u + u].dp, t[u + u + 1].dp);
}
 
void clear(int u, int l, int r) {
 	t[u].tag = -1, t[u].ans = 1e18, t[u].mx = 0;
 	if (l == r) return;
 	int m = l + r >> 1;
 	clear(u * 2, l, m);
 	clear(u * 2 + 1, m + 1, r);
}
 
ll get(int u, int ul, int ur, int l, int r) {
	push(u, ul, ur);
 	if (l > ur || ul > r) return 1e18 * 1ll;
 	if (l <= ul && ur <= r) return t[u].ans;
 	int um = ul + ur >> 1ll;
 	return min(get(u + u, ul, um, l, r), get(u + u + 1, um + 1, ur, l, r));
}
 
int main() {  
 
	ios_base :: sync_with_stdio(false);               
	cin.tie(nullptr);
	srand(time(nullptr));
	cin >> n >> k;
	a[0] = 1e9;
	for (int i = 1; i <= n; i++) cin >> a[i];
	ll mx = 0;
	for (int i = 1; i <= n; i++) mx = max(mx, a[i]), dp[i] = mx;
	stack<int> s;
	s.push(0);
	for (int i = 1; i <= n; i++) {
	 	while (a[s.top()] <= a[i]) s.pop();
	 	l[i] = s.top() + 1;
	 	s.push(i);
	}
 
	clear(1, 1, n);
	for (int i = 1; i <= n; i++) 
	 		update(1, 1, n, i, dp[i - 1]);
 
	for (int block = 2; block <= k; block++) {
	 	for (int i = block; i <= n; i++) {
	 	 	update_mx(1, 1, n, l[i], i, a[i]);
	 	 	dp[i] = get(1, 1, n, block, i);
	 	}
	 	clear(1, 1, n);
	 	for (int i = block + 1; i <= n; i++) 
	 		update(1, 1, n, i, dp[i - 1]);
	}
	cout << dp[n];
 
  return 0;
}

Compilation message

blocks.cpp: In function 'void update_mx(int, int, int, int, int, ll)':
blocks.cpp:60:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |   int um = ul + ur >> 1;
      |            ~~~^~~~
blocks.cpp: In function 'void update(int, int, int, int, ll)':
blocks.cpp:73:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   73 |  int m = l + r >> 1;
      |          ~~^~~
blocks.cpp: In function 'void clear(int, int, int)':
blocks.cpp:83:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   83 |   int m = l + r >> 1;
      |           ~~^~~
blocks.cpp: In function 'll get(int, int, int, int, int)':
blocks.cpp:92:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   92 |   int um = ul + ur >> 1ll;
      |            ~~~^~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 492 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 1 ms 364 KB Output is correct
37 Correct 1 ms 364 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 2 ms 364 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 1 ms 364 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 0 ms 364 KB Output is correct
46 Correct 0 ms 364 KB Output is correct
47 Correct 0 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 1 ms 364 KB Output is correct
50 Correct 0 ms 364 KB Output is correct
51 Correct 1 ms 364 KB Output is correct
52 Correct 1 ms 364 KB Output is correct
53 Correct 2 ms 364 KB Output is correct
54 Correct 2 ms 364 KB Output is correct
55 Correct 2 ms 364 KB Output is correct
56 Correct 2 ms 364 KB Output is correct
57 Correct 2 ms 364 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 492 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 1 ms 364 KB Output is correct
37 Correct 1 ms 364 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 2 ms 364 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 1 ms 364 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 0 ms 364 KB Output is correct
46 Correct 0 ms 364 KB Output is correct
47 Correct 0 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 1 ms 364 KB Output is correct
50 Correct 0 ms 364 KB Output is correct
51 Correct 1 ms 364 KB Output is correct
52 Correct 1 ms 364 KB Output is correct
53 Correct 2 ms 364 KB Output is correct
54 Correct 2 ms 364 KB Output is correct
55 Correct 2 ms 364 KB Output is correct
56 Correct 2 ms 364 KB Output is correct
57 Correct 2 ms 364 KB Output is correct
58 Correct 211 ms 1644 KB Output is correct
59 Correct 17 ms 5484 KB Output is correct
60 Correct 310 ms 5564 KB Output is correct
61 Execution timed out 1087 ms 5484 KB Time limit exceeded
62 Halted 0 ms 0 KB -