oj.uz

Submission #647611

# Submission time Handle Problem Language Result Execution time Memory
647611 2022-10-03T10:05:18 Z dattranxxx K blocks (IZhO14_blocks) C++11
100 / 100
 202 ms 3004 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;

const int N = 1e5 + 5;
const ll inf = 1e18;
int a[N];

int n, m;

vector<ll> pre, cur;
#define fi first
#define se second

void solve(int l, int r, int x, int y) {
	if (l > r) return;
	int m = l + r >> 1;
	pair<ll, int> best = {inf, -1};
	
	for (int i = min(m, y), val = a[i]; i >= x; --i, val = max(val, a[i]))
		best = min(best, {pre[i - 1] + val, i});
	cur[m] = best.fi;
	solve(l, m - 1, x, best.se);
	solve(m + 1, r, best.se, y);
}

void task1() {
	for (int k = 1; k <= m; ++k) {
		for (int i = 1; i <= n; ++i) {
			cur[i] = inf;
			for (int j = i, val = a[i]; j; --j, val = max(val, a[j])) {
				cur[i] = min(cur[i], pre[j - 1] + val);
			}
		}
		cur.swap(pre);
	}
	cout << pre[n];
}

int main() {
	if (fopen("kblocks.inp", "r"))
		freopen("kblocks.inp", "r", stdin),
		freopen("kblocks.out", "w", stdout);
	cin >> n >> m;
	for (int i = 1; i <= n; ++i)
		cin >> a[i];
	pre.assign(n + 1, inf); cur.assign(n + 1, inf);
	pre[0] = 0;
	
	//if (n <= 100) return task1(), 0;
	
	for (int k = 1; k <= m; ++k) {
		stack<pair<int, ll>> st;
		cur.assign(n + 1, inf);
		for (int i = 1; i <= n; ++i) {
			ll val = pre[i - 1];
			while (!st.empty() && a[i] > a[st.top().fi]) {
				val = min(val, st.top().se); st.pop();
			} 
			cur[i] = min(cur[st.empty() ? 0 : st.top().fi], val + a[i]);
			st.emplace(i, val);
		}
		cur.swap(pre);
	}
	cout << pre[n];
	return 0;
}

Compilation message

blocks.cpp: In function 'void solve(int, int, int, int)':
blocks.cpp:17:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |  int m = l + r >> 1;
      |          ~~^~~
blocks.cpp: In function 'int main()':
blocks.cpp:42:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |   freopen("kblocks.inp", "r", stdin),
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:43:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |   freopen("kblocks.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 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 1 ms 212 KB Output is correct
6 Correct 1 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 0 ms 212 KB Output is correct
10 Correct 0 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 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# 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 1 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 0 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 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 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #3
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 1 ms 212 KB Output is correct
6 Correct 1 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 0 ms 212 KB Output is correct
10 Correct 0 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 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 1 ms 212 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 1 ms 212 KB Output is correct

Subtask #4
47.0 / 47.0

# 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 1 ms 212 KB Output is correct
6 Correct 1 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 0 ms 212 KB Output is correct
10 Correct 0 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 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 1 ms 212 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 1 ms 212 KB Output is correct
58 Correct 7 ms 492 KB Output is correct
59 Correct 16 ms 1112 KB Output is correct
60 Correct 21 ms 1120 KB Output is correct
61 Correct 59 ms 1168 KB Output is correct
62 Correct 159 ms 2152 KB Output is correct
63 Correct 34 ms 2260 KB Output is correct
64 Correct 91 ms 2184 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 1 ms 212 KB Output is correct
68 Correct 1 ms 212 KB Output is correct
69 Correct 1 ms 212 KB Output is correct
70 Correct 1 ms 212 KB Output is correct
71 Correct 24 ms 504 KB Output is correct
72 Correct 4 ms 468 KB Output is correct
73 Correct 8 ms 496 KB Output is correct
74 Correct 15 ms 1104 KB Output is correct
75 Correct 18 ms 1188 KB Output is correct
76 Correct 70 ms 1228 KB Output is correct
77 Correct 202 ms 2300 KB Output is correct
78 Correct 43 ms 2200 KB Output is correct
79 Correct 105 ms 2252 KB Output is correct
80 Correct 38 ms 2252 KB Output is correct
81 Correct 48 ms 2380 KB Output is correct
82 Correct 200 ms 2256 KB Output is correct
83 Correct 1 ms 212 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 19 ms 572 KB Output is correct
86 Correct 6 ms 468 KB Output is correct
87 Correct 8 ms 572 KB Output is correct
88 Correct 17 ms 1440 KB Output is correct
89 Correct 22 ms 1496 KB Output is correct
90 Correct 71 ms 1492 KB Output is correct
91 Correct 196 ms 3004 KB Output is correct
92 Correct 35 ms 2960 KB Output is correct
93 Correct 115 ms 2980 KB Output is correct
94 Correct 4 ms 468 KB Output is correct
95 Correct 17 ms 500 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 1 ms 212 KB Output is correct
98 Correct 1 ms 212 KB Output is correct
99 Correct 0 ms 212 KB Output is correct