/*
Uruchamiamy samolot zwiadowczy ( + 500% do wzlamaniej )
/▄/ /█/ /◐/ /▐/ /▌/ /▀/ /░/ /🔥/ choose own style!
***IT'S OUR LONG WAY TO THE OIILLLL***
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*/
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/detail/standard_policies.hpp>'
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;template <typename T> using ordered_set = tree <T, null_type, less< T >, rb_tree_tag,tree_order_statistics_node_update>;
#define pb push_back
#define ll long long
#define ld long double
#define fi first
#define se second
//#define pi 3.14159265358979323846
#define pii pair < ll , int >
#define pipii pair< int, pair < int , int > >
#define siz(n) (int)(n.size())
#define TIME 1.0 * clock() / CLOCKS_PER_SEC
const int inf=1e9 + 7;
const ll inf18=1e18 + 7;
const int N=1e5 + 7;
const int MN = 2097152;
const int M = 1e9 + 7;
int k, n, m, st, en;
vector < pii > g[N];
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
#ifdef Estb_probitie
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int n;
cin >> n;
int a[n];
ll pref[n] = {};
ll psum[n] = {};
for (int i = 0; i < n; ++i)
cin >> a[i];
pref[0] = a[0];
for (int i = 1; i < n; ++i)
pref[i] = pref[i - 1] + a[i];
int dp[n] = {};
int st[n] = {};
dp[0] = 1;
st[0] = 0;
int ans = 0;
for (int i = 0; i < n; ++i)
{
if (i)
if (dp[i] < dp[i - 1])
{
dp[i] = dp[i - 1];
st[i] = st[i - 1];
psum[i] = psum[i - 1];
}
ans = max(ans, dp[i]);
ll ousum = pref[i];
if (st[i])
ousum -= pref[st[i] - 1];
while(ousum - 2 * a[st[i]] >= psum[i])
{
psum[i] += a[st[i]];
ousum -= a[st[i]];
++st[i];
}
int l = i + 1, r = n;
while(l < r)
{
int mid = (l + r) >> 1;
if (pref[mid] - pref[i] < ousum)
l = mid + 1; else r = mid;
}
// cout<<pref[i] - (st[i] - 1)<<" "<<dp[i]<<'\n';
if (l == n) continue;
if (dp[l] <= dp[i] + 1)
{
dp[l] = dp[i] + 1;
st[l] = i + 1;
psum[l] = ousum;
}
}
cout << ans;
}
Compilation message
segments.cpp:35:50: warning: missing terminating ' character
#include <ext/pb_ds/detail/standard_policies.hpp>'
^
segments.cpp:35:50: warning: extra tokens at end of #include directive
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2684 KB |
Output is correct |
3 |
Correct |
4 ms |
2680 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
4 ms |
2684 KB |
Output is correct |
6 |
Correct |
4 ms |
2680 KB |
Output is correct |
7 |
Correct |
19 ms |
2680 KB |
Output is correct |
8 |
Correct |
4 ms |
2680 KB |
Output is correct |
9 |
Correct |
4 ms |
2680 KB |
Output is correct |
10 |
Correct |
4 ms |
2680 KB |
Output is correct |
11 |
Correct |
5 ms |
2680 KB |
Output is correct |
12 |
Correct |
4 ms |
2680 KB |
Output is correct |
13 |
Correct |
4 ms |
2680 KB |
Output is correct |
14 |
Correct |
4 ms |
2680 KB |
Output is correct |
15 |
Correct |
4 ms |
2684 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2684 KB |
Output is correct |
3 |
Correct |
4 ms |
2680 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
4 ms |
2684 KB |
Output is correct |
6 |
Correct |
4 ms |
2680 KB |
Output is correct |
7 |
Correct |
19 ms |
2680 KB |
Output is correct |
8 |
Correct |
4 ms |
2680 KB |
Output is correct |
9 |
Correct |
4 ms |
2680 KB |
Output is correct |
10 |
Correct |
4 ms |
2680 KB |
Output is correct |
11 |
Correct |
5 ms |
2680 KB |
Output is correct |
12 |
Correct |
4 ms |
2680 KB |
Output is correct |
13 |
Correct |
4 ms |
2680 KB |
Output is correct |
14 |
Correct |
4 ms |
2680 KB |
Output is correct |
15 |
Correct |
4 ms |
2684 KB |
Output is correct |
16 |
Correct |
4 ms |
2680 KB |
Output is correct |
17 |
Correct |
4 ms |
2680 KB |
Output is correct |
18 |
Correct |
4 ms |
2680 KB |
Output is correct |
19 |
Correct |
4 ms |
2680 KB |
Output is correct |
20 |
Correct |
4 ms |
2680 KB |
Output is correct |
21 |
Correct |
4 ms |
2680 KB |
Output is correct |
22 |
Correct |
4 ms |
2684 KB |
Output is correct |
23 |
Correct |
4 ms |
2680 KB |
Output is correct |
24 |
Correct |
4 ms |
2680 KB |
Output is correct |
25 |
Correct |
4 ms |
2680 KB |
Output is correct |
26 |
Correct |
4 ms |
2680 KB |
Output is correct |
27 |
Correct |
4 ms |
2680 KB |
Output is correct |
28 |
Correct |
4 ms |
2680 KB |
Output is correct |
29 |
Correct |
4 ms |
2680 KB |
Output is correct |
30 |
Correct |
4 ms |
2680 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2684 KB |
Output is correct |
3 |
Correct |
4 ms |
2680 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
4 ms |
2684 KB |
Output is correct |
6 |
Correct |
4 ms |
2680 KB |
Output is correct |
7 |
Correct |
19 ms |
2680 KB |
Output is correct |
8 |
Correct |
4 ms |
2680 KB |
Output is correct |
9 |
Correct |
4 ms |
2680 KB |
Output is correct |
10 |
Correct |
4 ms |
2680 KB |
Output is correct |
11 |
Correct |
5 ms |
2680 KB |
Output is correct |
12 |
Correct |
4 ms |
2680 KB |
Output is correct |
13 |
Correct |
4 ms |
2680 KB |
Output is correct |
14 |
Correct |
4 ms |
2680 KB |
Output is correct |
15 |
Correct |
4 ms |
2684 KB |
Output is correct |
16 |
Correct |
4 ms |
2680 KB |
Output is correct |
17 |
Correct |
4 ms |
2680 KB |
Output is correct |
18 |
Correct |
4 ms |
2680 KB |
Output is correct |
19 |
Correct |
4 ms |
2680 KB |
Output is correct |
20 |
Correct |
4 ms |
2680 KB |
Output is correct |
21 |
Correct |
4 ms |
2680 KB |
Output is correct |
22 |
Correct |
4 ms |
2684 KB |
Output is correct |
23 |
Correct |
4 ms |
2680 KB |
Output is correct |
24 |
Correct |
4 ms |
2680 KB |
Output is correct |
25 |
Correct |
4 ms |
2680 KB |
Output is correct |
26 |
Correct |
4 ms |
2680 KB |
Output is correct |
27 |
Correct |
4 ms |
2680 KB |
Output is correct |
28 |
Correct |
4 ms |
2680 KB |
Output is correct |
29 |
Correct |
4 ms |
2680 KB |
Output is correct |
30 |
Correct |
4 ms |
2680 KB |
Output is correct |
31 |
Correct |
4 ms |
2808 KB |
Output is correct |
32 |
Correct |
4 ms |
2936 KB |
Output is correct |
33 |
Correct |
5 ms |
2808 KB |
Output is correct |
34 |
Correct |
5 ms |
2680 KB |
Output is correct |
35 |
Correct |
5 ms |
2808 KB |
Output is correct |
36 |
Correct |
5 ms |
2808 KB |
Output is correct |
37 |
Correct |
5 ms |
2784 KB |
Output is correct |
38 |
Correct |
4 ms |
2684 KB |
Output is correct |
39 |
Correct |
4 ms |
2808 KB |
Output is correct |
40 |
Correct |
5 ms |
2808 KB |
Output is correct |
41 |
Correct |
4 ms |
2808 KB |
Output is correct |
42 |
Correct |
5 ms |
2808 KB |
Output is correct |
43 |
Correct |
4 ms |
2808 KB |
Output is correct |
44 |
Correct |
5 ms |
2808 KB |
Output is correct |
45 |
Correct |
4 ms |
2808 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2684 KB |
Output is correct |
3 |
Correct |
4 ms |
2680 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
4 ms |
2684 KB |
Output is correct |
6 |
Correct |
4 ms |
2680 KB |
Output is correct |
7 |
Correct |
19 ms |
2680 KB |
Output is correct |
8 |
Correct |
4 ms |
2680 KB |
Output is correct |
9 |
Correct |
4 ms |
2680 KB |
Output is correct |
10 |
Correct |
4 ms |
2680 KB |
Output is correct |
11 |
Correct |
5 ms |
2680 KB |
Output is correct |
12 |
Correct |
4 ms |
2680 KB |
Output is correct |
13 |
Correct |
4 ms |
2680 KB |
Output is correct |
14 |
Correct |
4 ms |
2680 KB |
Output is correct |
15 |
Correct |
4 ms |
2684 KB |
Output is correct |
16 |
Correct |
4 ms |
2680 KB |
Output is correct |
17 |
Correct |
4 ms |
2680 KB |
Output is correct |
18 |
Correct |
4 ms |
2680 KB |
Output is correct |
19 |
Correct |
4 ms |
2680 KB |
Output is correct |
20 |
Correct |
4 ms |
2680 KB |
Output is correct |
21 |
Correct |
4 ms |
2680 KB |
Output is correct |
22 |
Correct |
4 ms |
2684 KB |
Output is correct |
23 |
Correct |
4 ms |
2680 KB |
Output is correct |
24 |
Correct |
4 ms |
2680 KB |
Output is correct |
25 |
Correct |
4 ms |
2680 KB |
Output is correct |
26 |
Correct |
4 ms |
2680 KB |
Output is correct |
27 |
Correct |
4 ms |
2680 KB |
Output is correct |
28 |
Correct |
4 ms |
2680 KB |
Output is correct |
29 |
Correct |
4 ms |
2680 KB |
Output is correct |
30 |
Correct |
4 ms |
2680 KB |
Output is correct |
31 |
Correct |
4 ms |
2808 KB |
Output is correct |
32 |
Correct |
4 ms |
2936 KB |
Output is correct |
33 |
Correct |
5 ms |
2808 KB |
Output is correct |
34 |
Correct |
5 ms |
2680 KB |
Output is correct |
35 |
Correct |
5 ms |
2808 KB |
Output is correct |
36 |
Correct |
5 ms |
2808 KB |
Output is correct |
37 |
Correct |
5 ms |
2784 KB |
Output is correct |
38 |
Correct |
4 ms |
2684 KB |
Output is correct |
39 |
Correct |
4 ms |
2808 KB |
Output is correct |
40 |
Correct |
5 ms |
2808 KB |
Output is correct |
41 |
Correct |
4 ms |
2808 KB |
Output is correct |
42 |
Correct |
5 ms |
2808 KB |
Output is correct |
43 |
Correct |
4 ms |
2808 KB |
Output is correct |
44 |
Correct |
5 ms |
2808 KB |
Output is correct |
45 |
Correct |
4 ms |
2808 KB |
Output is correct |
46 |
Correct |
18 ms |
5752 KB |
Output is correct |
47 |
Correct |
22 ms |
5880 KB |
Output is correct |
48 |
Correct |
24 ms |
6264 KB |
Output is correct |
49 |
Correct |
23 ms |
6392 KB |
Output is correct |
50 |
Correct |
23 ms |
6392 KB |
Output is correct |
51 |
Incorrect |
26 ms |
6392 KB |
Output isn't correct |
52 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2684 KB |
Output is correct |
3 |
Correct |
4 ms |
2680 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
4 ms |
2684 KB |
Output is correct |
6 |
Correct |
4 ms |
2680 KB |
Output is correct |
7 |
Correct |
19 ms |
2680 KB |
Output is correct |
8 |
Correct |
4 ms |
2680 KB |
Output is correct |
9 |
Correct |
4 ms |
2680 KB |
Output is correct |
10 |
Correct |
4 ms |
2680 KB |
Output is correct |
11 |
Correct |
5 ms |
2680 KB |
Output is correct |
12 |
Correct |
4 ms |
2680 KB |
Output is correct |
13 |
Correct |
4 ms |
2680 KB |
Output is correct |
14 |
Correct |
4 ms |
2680 KB |
Output is correct |
15 |
Correct |
4 ms |
2684 KB |
Output is correct |
16 |
Correct |
4 ms |
2680 KB |
Output is correct |
17 |
Correct |
4 ms |
2680 KB |
Output is correct |
18 |
Correct |
4 ms |
2680 KB |
Output is correct |
19 |
Correct |
4 ms |
2680 KB |
Output is correct |
20 |
Correct |
4 ms |
2680 KB |
Output is correct |
21 |
Correct |
4 ms |
2680 KB |
Output is correct |
22 |
Correct |
4 ms |
2684 KB |
Output is correct |
23 |
Correct |
4 ms |
2680 KB |
Output is correct |
24 |
Correct |
4 ms |
2680 KB |
Output is correct |
25 |
Correct |
4 ms |
2680 KB |
Output is correct |
26 |
Correct |
4 ms |
2680 KB |
Output is correct |
27 |
Correct |
4 ms |
2680 KB |
Output is correct |
28 |
Correct |
4 ms |
2680 KB |
Output is correct |
29 |
Correct |
4 ms |
2680 KB |
Output is correct |
30 |
Correct |
4 ms |
2680 KB |
Output is correct |
31 |
Correct |
4 ms |
2808 KB |
Output is correct |
32 |
Correct |
4 ms |
2936 KB |
Output is correct |
33 |
Correct |
5 ms |
2808 KB |
Output is correct |
34 |
Correct |
5 ms |
2680 KB |
Output is correct |
35 |
Correct |
5 ms |
2808 KB |
Output is correct |
36 |
Correct |
5 ms |
2808 KB |
Output is correct |
37 |
Correct |
5 ms |
2784 KB |
Output is correct |
38 |
Correct |
4 ms |
2684 KB |
Output is correct |
39 |
Correct |
4 ms |
2808 KB |
Output is correct |
40 |
Correct |
5 ms |
2808 KB |
Output is correct |
41 |
Correct |
4 ms |
2808 KB |
Output is correct |
42 |
Correct |
5 ms |
2808 KB |
Output is correct |
43 |
Correct |
4 ms |
2808 KB |
Output is correct |
44 |
Correct |
5 ms |
2808 KB |
Output is correct |
45 |
Correct |
4 ms |
2808 KB |
Output is correct |
46 |
Correct |
18 ms |
5752 KB |
Output is correct |
47 |
Correct |
22 ms |
5880 KB |
Output is correct |
48 |
Correct |
24 ms |
6264 KB |
Output is correct |
49 |
Correct |
23 ms |
6392 KB |
Output is correct |
50 |
Correct |
23 ms |
6392 KB |
Output is correct |
51 |
Incorrect |
26 ms |
6392 KB |
Output isn't correct |
52 |
Halted |
0 ms |
0 KB |
- |