#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
//#pragma GCC optimization("g", on)
//#pragma GCC optimization("03")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("inline")
//#pragma GCC optimize("-fgcse,-fgcse-lm")
//#pragma GCC optimize("-ftree-pre,-ftree-vrp")
//#pragma GCC optimize("-ffast-math")
//#pragma GCC optimize("-fipa-sra")
//#pragma GCC optimize("-fpeephole2")
//#pragma GCC optimize("-fsched-spec")
//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//#pragma GCC optimize("unroll-loops")
#define aboba ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define br break;
#define sp " "
#define en "\n"
#define pb push_back
#define sz size()
#define bg begin()
#define ed end()
#define in insert
#define ss second
#define ff first
#define setp(a) cout << fixed; cout << setprecision(a);
#define all(v) v.begin(), v.end()
typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef double db;
typedef tree<
long long,
null_type,
less_equal<long long>,
rb_tree_tag,
tree_order_statistics_node_update> orset;
void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
ll bp(ll x, ll y, ll z) { ll res = 1; while (y) { if (y & 1) { res = (res * x) % z; y--; } x = (x * x) % z; y >>= 1; } return res; }
// C(n, k) = ((fact[n] * bp(fact[k], mod - 2)) % mod * bp(fact[n - k], mod - 2)) % mod;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll lcm(ll a, ll b) { return (a / __gcd(a, b)) * b; }
const ll N = 5e5 + 11;
const ll inf = 1e18 + 7;
ll tt = 1;
ll a[N];
pll dp[N];
ll cnt[5005];
ll p[N];
void solve() {
ll n; cin >> n;
for (int i = 1;i <= n;i++) cin >> a[i], p[i] = p[i - 1] + a[i];
dp[1] = {1, -a[1]};
for (int i = 1;i <= n;i++) {
dp[i] = max(dp[i], {dp[i - 1].ff, dp[i - 1].ss - a[i]});
// cout << dp[i].ff << sp << dp[i].ss << en;
ll l = i + 1, r = n, pos = 0;
while (l <= r) {
ll m = (l + r) / 2;
if (p[m] - p[i] >= -dp[i].ss) {
r = m - 1;
pos = m;
} else l = m + 1;
}
if (pos == 0) continue;
dp[pos] = max(dp[pos], {dp[i].ff + 1, -(p[pos] - p[i])});
}
cout << dp[n].ff << en;
}
int main() {
aboba
// freopen("cownomics");
// precalc();
// cin >> tt;
for (int i = 1;i <= tt;i++) {
solve();
}
}
Compilation message
segments.cpp: In function 'void freopen(std::string)':
segments.cpp:47:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
47 | void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:47:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
47 | void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
4444 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4440 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
1 ms |
4444 KB |
Output is correct |
12 |
Correct |
1 ms |
4444 KB |
Output is correct |
13 |
Correct |
1 ms |
4440 KB |
Output is correct |
14 |
Correct |
1 ms |
4444 KB |
Output is correct |
15 |
Correct |
1 ms |
4444 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
4444 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4440 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
1 ms |
4444 KB |
Output is correct |
12 |
Correct |
1 ms |
4444 KB |
Output is correct |
13 |
Correct |
1 ms |
4440 KB |
Output is correct |
14 |
Correct |
1 ms |
4444 KB |
Output is correct |
15 |
Correct |
1 ms |
4444 KB |
Output is correct |
16 |
Correct |
1 ms |
4440 KB |
Output is correct |
17 |
Correct |
1 ms |
4444 KB |
Output is correct |
18 |
Correct |
1 ms |
4444 KB |
Output is correct |
19 |
Correct |
1 ms |
4444 KB |
Output is correct |
20 |
Correct |
1 ms |
4444 KB |
Output is correct |
21 |
Correct |
1 ms |
4572 KB |
Output is correct |
22 |
Correct |
1 ms |
4444 KB |
Output is correct |
23 |
Correct |
1 ms |
4440 KB |
Output is correct |
24 |
Correct |
1 ms |
4440 KB |
Output is correct |
25 |
Correct |
1 ms |
4444 KB |
Output is correct |
26 |
Correct |
1 ms |
4444 KB |
Output is correct |
27 |
Correct |
1 ms |
4444 KB |
Output is correct |
28 |
Correct |
1 ms |
4444 KB |
Output is correct |
29 |
Correct |
1 ms |
4444 KB |
Output is correct |
30 |
Correct |
1 ms |
4444 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
4444 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4440 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
1 ms |
4444 KB |
Output is correct |
12 |
Correct |
1 ms |
4444 KB |
Output is correct |
13 |
Correct |
1 ms |
4440 KB |
Output is correct |
14 |
Correct |
1 ms |
4444 KB |
Output is correct |
15 |
Correct |
1 ms |
4444 KB |
Output is correct |
16 |
Correct |
1 ms |
4440 KB |
Output is correct |
17 |
Correct |
1 ms |
4444 KB |
Output is correct |
18 |
Correct |
1 ms |
4444 KB |
Output is correct |
19 |
Correct |
1 ms |
4444 KB |
Output is correct |
20 |
Correct |
1 ms |
4444 KB |
Output is correct |
21 |
Correct |
1 ms |
4572 KB |
Output is correct |
22 |
Correct |
1 ms |
4444 KB |
Output is correct |
23 |
Correct |
1 ms |
4440 KB |
Output is correct |
24 |
Correct |
1 ms |
4440 KB |
Output is correct |
25 |
Correct |
1 ms |
4444 KB |
Output is correct |
26 |
Correct |
1 ms |
4444 KB |
Output is correct |
27 |
Correct |
1 ms |
4444 KB |
Output is correct |
28 |
Correct |
1 ms |
4444 KB |
Output is correct |
29 |
Correct |
1 ms |
4444 KB |
Output is correct |
30 |
Correct |
1 ms |
4444 KB |
Output is correct |
31 |
Correct |
1 ms |
4440 KB |
Output is correct |
32 |
Correct |
1 ms |
4584 KB |
Output is correct |
33 |
Correct |
1 ms |
4444 KB |
Output is correct |
34 |
Correct |
1 ms |
4444 KB |
Output is correct |
35 |
Correct |
1 ms |
4620 KB |
Output is correct |
36 |
Correct |
1 ms |
4444 KB |
Output is correct |
37 |
Correct |
1 ms |
4440 KB |
Output is correct |
38 |
Correct |
1 ms |
4444 KB |
Output is correct |
39 |
Correct |
1 ms |
4444 KB |
Output is correct |
40 |
Correct |
1 ms |
4444 KB |
Output is correct |
41 |
Correct |
1 ms |
4440 KB |
Output is correct |
42 |
Correct |
1 ms |
4440 KB |
Output is correct |
43 |
Correct |
1 ms |
4444 KB |
Output is correct |
44 |
Correct |
1 ms |
4444 KB |
Output is correct |
45 |
Correct |
1 ms |
4440 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
4444 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4440 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
1 ms |
4444 KB |
Output is correct |
12 |
Correct |
1 ms |
4444 KB |
Output is correct |
13 |
Correct |
1 ms |
4440 KB |
Output is correct |
14 |
Correct |
1 ms |
4444 KB |
Output is correct |
15 |
Correct |
1 ms |
4444 KB |
Output is correct |
16 |
Correct |
1 ms |
4440 KB |
Output is correct |
17 |
Correct |
1 ms |
4444 KB |
Output is correct |
18 |
Correct |
1 ms |
4444 KB |
Output is correct |
19 |
Correct |
1 ms |
4444 KB |
Output is correct |
20 |
Correct |
1 ms |
4444 KB |
Output is correct |
21 |
Correct |
1 ms |
4572 KB |
Output is correct |
22 |
Correct |
1 ms |
4444 KB |
Output is correct |
23 |
Correct |
1 ms |
4440 KB |
Output is correct |
24 |
Correct |
1 ms |
4440 KB |
Output is correct |
25 |
Correct |
1 ms |
4444 KB |
Output is correct |
26 |
Correct |
1 ms |
4444 KB |
Output is correct |
27 |
Correct |
1 ms |
4444 KB |
Output is correct |
28 |
Correct |
1 ms |
4444 KB |
Output is correct |
29 |
Correct |
1 ms |
4444 KB |
Output is correct |
30 |
Correct |
1 ms |
4444 KB |
Output is correct |
31 |
Correct |
1 ms |
4440 KB |
Output is correct |
32 |
Correct |
1 ms |
4584 KB |
Output is correct |
33 |
Correct |
1 ms |
4444 KB |
Output is correct |
34 |
Correct |
1 ms |
4444 KB |
Output is correct |
35 |
Correct |
1 ms |
4620 KB |
Output is correct |
36 |
Correct |
1 ms |
4444 KB |
Output is correct |
37 |
Correct |
1 ms |
4440 KB |
Output is correct |
38 |
Correct |
1 ms |
4444 KB |
Output is correct |
39 |
Correct |
1 ms |
4444 KB |
Output is correct |
40 |
Correct |
1 ms |
4444 KB |
Output is correct |
41 |
Correct |
1 ms |
4440 KB |
Output is correct |
42 |
Correct |
1 ms |
4440 KB |
Output is correct |
43 |
Correct |
1 ms |
4444 KB |
Output is correct |
44 |
Correct |
1 ms |
4444 KB |
Output is correct |
45 |
Correct |
1 ms |
4440 KB |
Output is correct |
46 |
Correct |
8 ms |
10332 KB |
Output is correct |
47 |
Correct |
12 ms |
10496 KB |
Output is correct |
48 |
Correct |
12 ms |
10676 KB |
Output is correct |
49 |
Correct |
11 ms |
10916 KB |
Output is correct |
50 |
Correct |
11 ms |
10984 KB |
Output is correct |
51 |
Correct |
13 ms |
10844 KB |
Output is correct |
52 |
Correct |
7 ms |
7516 KB |
Output is correct |
53 |
Correct |
4 ms |
7004 KB |
Output is correct |
54 |
Correct |
10 ms |
10088 KB |
Output is correct |
55 |
Correct |
11 ms |
10840 KB |
Output is correct |
56 |
Correct |
8 ms |
10332 KB |
Output is correct |
57 |
Correct |
9 ms |
10284 KB |
Output is correct |
58 |
Correct |
9 ms |
10332 KB |
Output is correct |
59 |
Correct |
9 ms |
10844 KB |
Output is correct |
60 |
Correct |
10 ms |
10632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
4444 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4440 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
1 ms |
4444 KB |
Output is correct |
12 |
Correct |
1 ms |
4444 KB |
Output is correct |
13 |
Correct |
1 ms |
4440 KB |
Output is correct |
14 |
Correct |
1 ms |
4444 KB |
Output is correct |
15 |
Correct |
1 ms |
4444 KB |
Output is correct |
16 |
Correct |
1 ms |
4440 KB |
Output is correct |
17 |
Correct |
1 ms |
4444 KB |
Output is correct |
18 |
Correct |
1 ms |
4444 KB |
Output is correct |
19 |
Correct |
1 ms |
4444 KB |
Output is correct |
20 |
Correct |
1 ms |
4444 KB |
Output is correct |
21 |
Correct |
1 ms |
4572 KB |
Output is correct |
22 |
Correct |
1 ms |
4444 KB |
Output is correct |
23 |
Correct |
1 ms |
4440 KB |
Output is correct |
24 |
Correct |
1 ms |
4440 KB |
Output is correct |
25 |
Correct |
1 ms |
4444 KB |
Output is correct |
26 |
Correct |
1 ms |
4444 KB |
Output is correct |
27 |
Correct |
1 ms |
4444 KB |
Output is correct |
28 |
Correct |
1 ms |
4444 KB |
Output is correct |
29 |
Correct |
1 ms |
4444 KB |
Output is correct |
30 |
Correct |
1 ms |
4444 KB |
Output is correct |
31 |
Correct |
1 ms |
4440 KB |
Output is correct |
32 |
Correct |
1 ms |
4584 KB |
Output is correct |
33 |
Correct |
1 ms |
4444 KB |
Output is correct |
34 |
Correct |
1 ms |
4444 KB |
Output is correct |
35 |
Correct |
1 ms |
4620 KB |
Output is correct |
36 |
Correct |
1 ms |
4444 KB |
Output is correct |
37 |
Correct |
1 ms |
4440 KB |
Output is correct |
38 |
Correct |
1 ms |
4444 KB |
Output is correct |
39 |
Correct |
1 ms |
4444 KB |
Output is correct |
40 |
Correct |
1 ms |
4444 KB |
Output is correct |
41 |
Correct |
1 ms |
4440 KB |
Output is correct |
42 |
Correct |
1 ms |
4440 KB |
Output is correct |
43 |
Correct |
1 ms |
4444 KB |
Output is correct |
44 |
Correct |
1 ms |
4444 KB |
Output is correct |
45 |
Correct |
1 ms |
4440 KB |
Output is correct |
46 |
Correct |
8 ms |
10332 KB |
Output is correct |
47 |
Correct |
12 ms |
10496 KB |
Output is correct |
48 |
Correct |
12 ms |
10676 KB |
Output is correct |
49 |
Correct |
11 ms |
10916 KB |
Output is correct |
50 |
Correct |
11 ms |
10984 KB |
Output is correct |
51 |
Correct |
13 ms |
10844 KB |
Output is correct |
52 |
Correct |
7 ms |
7516 KB |
Output is correct |
53 |
Correct |
4 ms |
7004 KB |
Output is correct |
54 |
Correct |
10 ms |
10088 KB |
Output is correct |
55 |
Correct |
11 ms |
10840 KB |
Output is correct |
56 |
Correct |
8 ms |
10332 KB |
Output is correct |
57 |
Correct |
9 ms |
10284 KB |
Output is correct |
58 |
Correct |
9 ms |
10332 KB |
Output is correct |
59 |
Correct |
9 ms |
10844 KB |
Output is correct |
60 |
Correct |
10 ms |
10632 KB |
Output is correct |
61 |
Correct |
42 ms |
17920 KB |
Output is correct |
62 |
Correct |
46 ms |
18000 KB |
Output is correct |
63 |
Correct |
50 ms |
18288 KB |
Output is correct |
64 |
Correct |
52 ms |
20560 KB |
Output is correct |
65 |
Correct |
50 ms |
20944 KB |
Output is correct |
66 |
Correct |
60 ms |
20844 KB |
Output is correct |
67 |
Correct |
48 ms |
18772 KB |
Output is correct |
68 |
Correct |
27 ms |
13436 KB |
Output is correct |
69 |
Correct |
44 ms |
17156 KB |
Output is correct |
70 |
Correct |
54 ms |
21076 KB |
Output is correct |
71 |
Correct |
37 ms |
17880 KB |
Output is correct |
72 |
Correct |
42 ms |
18256 KB |
Output is correct |
73 |
Correct |
42 ms |
19032 KB |
Output is correct |
74 |
Correct |
43 ms |
19344 KB |
Output is correct |
75 |
Correct |
43 ms |
19444 KB |
Output is correct |