oj.uz

Submission #497467

# Submission time Handle Problem Language Result Execution time Memory
497467 2021-12-23T06:21:14 Z Nalrimet Bigger segments (IZhO19_segments) C++17
100 / 100
 86 ms 32568 KB 
#include <bits/stdc++.h>

#pragma GCC optimization("g", on)
#pragma GCC optimize ("inline")
#pragma GCC optimization("03")
#pragma GCC optimization("unroll-loops")
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")

#define ll long long
#define pb push_back
#define F first
#define S second

using namespace std;

const int N = 5 * 1e5 + 5;
const int inf = 1e9 + 7;

long long a[N], pref[N], dp[N], mn[N], lef[N];
vector<int> v[N];
int n;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

	cin >> n;

//8
//7 2 3 5 1 4 6 10
// pref[i] - pref[j] >= pref[j] - pref[k]
// pref[i] >= 2 * pref[j] - pref[k]
	for(ll i = 1; i <= n; ++i){
        cin >> a[i];
        pref[i] = pref[i - 1] + a[i];
	}
    for(ll i = 1; i <= n; ++i){
        lef[i] = max(lef[i], lef[i - 1]);
        dp[i] = dp[lef[i]] + 1;
        int l, r, mid;
        l = i + 1;
        r = n;
        while(l < r){
            mid = (l + r) / 2;
            if(2 * pref[i] - pref[lef[i]] <= pref[mid]) r = mid;
            else l = mid + 1;
        }
        if(2 * pref[i] - pref[lef[i]] <= pref[l]) lef[l] = max(lef[l], i);
	}

	cout << dp[n];

	return 0;
}

Compilation message

segments.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization("g", on)
      | 
segments.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization("03")
      | 
segments.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization("unroll-loops")
      | 
segments.cpp:7: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    7 | #pragma comment(linker, "/stack:200000000")
      |

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 6 ms 12068 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 8 ms 12004 KB Output is correct
6 Correct 9 ms 12020 KB Output is correct
7 Correct 9 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 12092 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 6 ms 11980 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 6 ms 12068 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 8 ms 12004 KB Output is correct
6 Correct 9 ms 12020 KB Output is correct
7 Correct 9 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 12092 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 6 ms 11980 KB Output is correct
16 Correct 7 ms 12108 KB Output is correct
17 Correct 6 ms 12108 KB Output is correct
18 Correct 7 ms 12108 KB Output is correct
19 Correct 6 ms 12048 KB Output is correct
20 Correct 7 ms 12000 KB Output is correct
21 Correct 6 ms 12108 KB Output is correct
22 Correct 6 ms 11980 KB Output is correct
23 Correct 6 ms 11980 KB Output is correct
24 Correct 7 ms 12108 KB Output is correct
25 Correct 7 ms 12108 KB Output is correct
26 Correct 8 ms 12108 KB Output is correct
27 Correct 6 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 6 ms 12108 KB Output is correct
30 Correct 8 ms 11980 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 6 ms 12068 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 8 ms 12004 KB Output is correct
6 Correct 9 ms 12020 KB Output is correct
7 Correct 9 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 12092 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 6 ms 11980 KB Output is correct
16 Correct 7 ms 12108 KB Output is correct
17 Correct 6 ms 12108 KB Output is correct
18 Correct 7 ms 12108 KB Output is correct
19 Correct 6 ms 12048 KB Output is correct
20 Correct 7 ms 12000 KB Output is correct
21 Correct 6 ms 12108 KB Output is correct
22 Correct 6 ms 11980 KB Output is correct
23 Correct 6 ms 11980 KB Output is correct
24 Correct 7 ms 12108 KB Output is correct
25 Correct 7 ms 12108 KB Output is correct
26 Correct 8 ms 12108 KB Output is correct
27 Correct 6 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 6 ms 12108 KB Output is correct
30 Correct 8 ms 11980 KB Output is correct
31 Correct 7 ms 12108 KB Output is correct
32 Correct 6 ms 12184 KB Output is correct
33 Correct 6 ms 12108 KB Output is correct
34 Correct 6 ms 12108 KB Output is correct
35 Correct 7 ms 12204 KB Output is correct
36 Correct 8 ms 12176 KB Output is correct
37 Correct 7 ms 12080 KB Output is correct
38 Correct 8 ms 12108 KB Output is correct
39 Correct 7 ms 12108 KB Output is correct
40 Correct 8 ms 12204 KB Output is correct
41 Correct 8 ms 12068 KB Output is correct
42 Correct 9 ms 12108 KB Output is correct
43 Correct 8 ms 12160 KB Output is correct
44 Correct 6 ms 12080 KB Output is correct
45 Correct 7 ms 12100 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 6 ms 12068 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 8 ms 12004 KB Output is correct
6 Correct 9 ms 12020 KB Output is correct
7 Correct 9 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 12092 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 6 ms 11980 KB Output is correct
16 Correct 7 ms 12108 KB Output is correct
17 Correct 6 ms 12108 KB Output is correct
18 Correct 7 ms 12108 KB Output is correct
19 Correct 6 ms 12048 KB Output is correct
20 Correct 7 ms 12000 KB Output is correct
21 Correct 6 ms 12108 KB Output is correct
22 Correct 6 ms 11980 KB Output is correct
23 Correct 6 ms 11980 KB Output is correct
24 Correct 7 ms 12108 KB Output is correct
25 Correct 7 ms 12108 KB Output is correct
26 Correct 8 ms 12108 KB Output is correct
27 Correct 6 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 6 ms 12108 KB Output is correct
30 Correct 8 ms 11980 KB Output is correct
31 Correct 7 ms 12108 KB Output is correct
32 Correct 6 ms 12184 KB Output is correct
33 Correct 6 ms 12108 KB Output is correct
34 Correct 6 ms 12108 KB Output is correct
35 Correct 7 ms 12204 KB Output is correct
36 Correct 8 ms 12176 KB Output is correct
37 Correct 7 ms 12080 KB Output is correct
38 Correct 8 ms 12108 KB Output is correct
39 Correct 7 ms 12108 KB Output is correct
40 Correct 8 ms 12204 KB Output is correct
41 Correct 8 ms 12068 KB Output is correct
42 Correct 9 ms 12108 KB Output is correct
43 Correct 8 ms 12160 KB Output is correct
44 Correct 6 ms 12080 KB Output is correct
45 Correct 7 ms 12100 KB Output is correct
46 Correct 17 ms 15564 KB Output is correct
47 Correct 19 ms 15720 KB Output is correct
48 Correct 21 ms 15940 KB Output is correct
49 Correct 20 ms 16016 KB Output is correct
50 Correct 23 ms 16164 KB Output is correct
51 Correct 21 ms 16068 KB Output is correct
52 Correct 16 ms 14080 KB Output is correct
53 Correct 12 ms 13316 KB Output is correct
54 Correct 16 ms 15416 KB Output is correct
55 Correct 22 ms 16160 KB Output is correct
56 Correct 16 ms 15592 KB Output is correct
57 Correct 18 ms 15552 KB Output is correct
58 Correct 18 ms 15564 KB Output is correct
59 Correct 17 ms 15696 KB Output is correct
60 Correct 17 ms 15656 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 6 ms 12068 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 8 ms 12004 KB Output is correct
6 Correct 9 ms 12020 KB Output is correct
7 Correct 9 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 7 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 12092 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 6 ms 11980 KB Output is correct
16 Correct 7 ms 12108 KB Output is correct
17 Correct 6 ms 12108 KB Output is correct
18 Correct 7 ms 12108 KB Output is correct
19 Correct 6 ms 12048 KB Output is correct
20 Correct 7 ms 12000 KB Output is correct
21 Correct 6 ms 12108 KB Output is correct
22 Correct 6 ms 11980 KB Output is correct
23 Correct 6 ms 11980 KB Output is correct
24 Correct 7 ms 12108 KB Output is correct
25 Correct 7 ms 12108 KB Output is correct
26 Correct 8 ms 12108 KB Output is correct
27 Correct 6 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 6 ms 12108 KB Output is correct
30 Correct 8 ms 11980 KB Output is correct
31 Correct 7 ms 12108 KB Output is correct
32 Correct 6 ms 12184 KB Output is correct
33 Correct 6 ms 12108 KB Output is correct
34 Correct 6 ms 12108 KB Output is correct
35 Correct 7 ms 12204 KB Output is correct
36 Correct 8 ms 12176 KB Output is correct
37 Correct 7 ms 12080 KB Output is correct
38 Correct 8 ms 12108 KB Output is correct
39 Correct 7 ms 12108 KB Output is correct
40 Correct 8 ms 12204 KB Output is correct
41 Correct 8 ms 12068 KB Output is correct
42 Correct 9 ms 12108 KB Output is correct
43 Correct 8 ms 12160 KB Output is correct
44 Correct 6 ms 12080 KB Output is correct
45 Correct 7 ms 12100 KB Output is correct
46 Correct 17 ms 15564 KB Output is correct
47 Correct 19 ms 15720 KB Output is correct
48 Correct 21 ms 15940 KB Output is correct
49 Correct 20 ms 16016 KB Output is correct
50 Correct 23 ms 16164 KB Output is correct
51 Correct 21 ms 16068 KB Output is correct
52 Correct 16 ms 14080 KB Output is correct
53 Correct 12 ms 13316 KB Output is correct
54 Correct 16 ms 15416 KB Output is correct
55 Correct 22 ms 16160 KB Output is correct
56 Correct 16 ms 15592 KB Output is correct
57 Correct 18 ms 15552 KB Output is correct
58 Correct 18 ms 15564 KB Output is correct
59 Correct 17 ms 15696 KB Output is correct
60 Correct 17 ms 15656 KB Output is correct
61 Correct 59 ms 29720 KB Output is correct
62 Correct 69 ms 29560 KB Output is correct
63 Correct 70 ms 30044 KB Output is correct
64 Correct 78 ms 32236 KB Output is correct
65 Correct 70 ms 32568 KB Output is correct
66 Correct 80 ms 32472 KB Output is correct
67 Correct 71 ms 28468 KB Output is correct
68 Correct 37 ms 20248 KB Output is correct
69 Correct 59 ms 28732 KB Output is correct
70 Correct 86 ms 32528 KB Output is correct
71 Correct 52 ms 29592 KB Output is correct
72 Correct 62 ms 29968 KB Output is correct
73 Correct 64 ms 30596 KB Output is correct
74 Correct 60 ms 31000 KB Output is correct
75 Correct 63 ms 30932 KB Output is correct