oj.uz

Submission #343680

# Submission time Handle Problem Language Result Execution time Memory
343680 2021-01-04T11:33:11 Z spike1236 Bigger segments (IZhO19_segments) C++14
100 / 100
 950 ms 259564 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ll long long
#define ld long double
#define all(_v) _v.begin(), _v.end()
#define sz(_v) (int)_v.size()
#define pii pair <int, int>
#define pll pair <ll, ll>
#define veci vector <int>
#define vecll vector <ll>


const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
const double PI = 3.1415926535897932384626433832795;
const double eps = 1e-9;
const int MOD1 = 1e9 + 7;
const int MOD2 = 998244353;

const int MAXN = 5e5 + 10;
ll pref[MAXN];
ll a[MAXN];
pll dp[MAXN];
int n;

pii t[MAXN * 40];
int ls[MAXN * 40];
int rs[MAXN * 40];
int sz = 1;

void upd(ll pos, pll val, int v = 1, ll tl = 1, ll tr = 1e15) {
    if(tl == tr) {
        t[v] = val;
        return;
    }
    ll tm = tl + tr >> 1;
    if(pos <= tm) {
        if(!ls[v]) ls[v] = ++sz;
        upd(pos, val, ls[v], tl, tm);
    } else {
        if(!rs[v]) rs[v] = ++sz;
        upd(pos, val, rs[v], tm + 1, tr);
    }
    t[v] = max(t[ls[v]], t[rs[v]]);
}

pll get(ll l, ll r, int v = 1, ll tl = 1, ll tr = 1e15) {
    if(l <= tl && tr <= r) return t[v];
    if(l > tr || r < tl) return mp(0, 0);
    ll tm = tl + tr >> 1;
    return max(get(l, r, ls[v], tl, tm), get(l, r, rs[v], tm + 1, tr));
}

void solve() {
    cin >> n;
    for(int i = 1; i <= n; ++i) cin >> a[i], pref[i] = pref[i - 1] + a[i];
    for(int i = 1; i <= n; ++i) {
        upd(pref[i - 1] * 2 - pref[dp[i - 1].s], mp(dp[i - 1].f, i - 1));
        dp[i] = get(0, pref[i]);
        dp[i].f++;
    }
    cout << dp[n].f;
}


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int T = 1;
    ///cin >> T;
    while(T--) solve(), cout << '\n';
    return 0;
}

Compilation message

segments.cpp: In function 'void upd(long long int, std::pair<long long int, long long int>, int, long long int, long long int)':
segments.cpp:40:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   40 |     ll tm = tl + tr >> 1;
      |             ~~~^~~~
segments.cpp: In function 'std::pair<long long int, long long int> get(long long int, long long int, int, long long int, long long int)':
segments.cpp:54:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   54 |     ll tm = tl + tr >> 1;
      |             ~~~^~~~

Subtask #1
13.0 / 13.0

# 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 0 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

Subtask #2
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 0 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 2 ms 768 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 1 ms 620 KB Output is correct
21 Correct 2 ms 632 KB Output is correct
22 Correct 1 ms 620 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 620 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 2 ms 492 KB Output is correct
30 Correct 1 ms 492 KB Output is correct

Subtask #3
10.0 / 10.0

# 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 0 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 2 ms 768 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 1 ms 620 KB Output is correct
21 Correct 2 ms 632 KB Output is correct
22 Correct 1 ms 620 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 620 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 2 ms 492 KB Output is correct
30 Correct 1 ms 492 KB Output is correct
31 Correct 6 ms 1260 KB Output is correct
32 Correct 6 ms 1516 KB Output is correct
33 Correct 6 ms 1644 KB Output is correct
34 Correct 6 ms 1644 KB Output is correct
35 Correct 6 ms 1900 KB Output is correct
36 Correct 6 ms 1900 KB Output is correct
37 Correct 5 ms 1644 KB Output is correct
38 Correct 4 ms 1388 KB Output is correct
39 Correct 5 ms 620 KB Output is correct
40 Correct 6 ms 1772 KB Output is correct
41 Correct 4 ms 620 KB Output is correct
42 Correct 5 ms 876 KB Output is correct
43 Correct 5 ms 620 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 6 ms 1004 KB Output is correct

Subtask #4
36.0 / 36.0

# 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 0 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 2 ms 768 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 1 ms 620 KB Output is correct
21 Correct 2 ms 632 KB Output is correct
22 Correct 1 ms 620 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 620 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 2 ms 492 KB Output is correct
30 Correct 1 ms 492 KB Output is correct
31 Correct 6 ms 1260 KB Output is correct
32 Correct 6 ms 1516 KB Output is correct
33 Correct 6 ms 1644 KB Output is correct
34 Correct 6 ms 1644 KB Output is correct
35 Correct 6 ms 1900 KB Output is correct
36 Correct 6 ms 1900 KB Output is correct
37 Correct 5 ms 1644 KB Output is correct
38 Correct 4 ms 1388 KB Output is correct
39 Correct 5 ms 620 KB Output is correct
40 Correct 6 ms 1772 KB Output is correct
41 Correct 4 ms 620 KB Output is correct
42 Correct 5 ms 876 KB Output is correct
43 Correct 5 ms 620 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 6 ms 1004 KB Output is correct
46 Correct 156 ms 20716 KB Output is correct
47 Correct 158 ms 23148 KB Output is correct
48 Correct 181 ms 43756 KB Output is correct
49 Correct 180 ms 46956 KB Output is correct
50 Correct 186 ms 51564 KB Output is correct
51 Correct 190 ms 50796 KB Output is correct
52 Correct 96 ms 25580 KB Output is correct
53 Correct 59 ms 15468 KB Output is correct
54 Correct 139 ms 9324 KB Output is correct
55 Correct 195 ms 49260 KB Output is correct
56 Correct 150 ms 24044 KB Output is correct
57 Correct 148 ms 20460 KB Output is correct
58 Correct 155 ms 22124 KB Output is correct
59 Correct 186 ms 30316 KB Output is correct
60 Correct 169 ms 30316 KB Output is correct

Subtask #5
27.0 / 27.0

# 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 0 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 2 ms 768 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 1 ms 620 KB Output is correct
21 Correct 2 ms 632 KB Output is correct
22 Correct 1 ms 620 KB Output is correct
23 Correct 1 ms 492 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 620 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 2 ms 492 KB Output is correct
30 Correct 1 ms 492 KB Output is correct
31 Correct 6 ms 1260 KB Output is correct
32 Correct 6 ms 1516 KB Output is correct
33 Correct 6 ms 1644 KB Output is correct
34 Correct 6 ms 1644 KB Output is correct
35 Correct 6 ms 1900 KB Output is correct
36 Correct 6 ms 1900 KB Output is correct
37 Correct 5 ms 1644 KB Output is correct
38 Correct 4 ms 1388 KB Output is correct
39 Correct 5 ms 620 KB Output is correct
40 Correct 6 ms 1772 KB Output is correct
41 Correct 4 ms 620 KB Output is correct
42 Correct 5 ms 876 KB Output is correct
43 Correct 5 ms 620 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 6 ms 1004 KB Output is correct
46 Correct 156 ms 20716 KB Output is correct
47 Correct 158 ms 23148 KB Output is correct
48 Correct 181 ms 43756 KB Output is correct
49 Correct 180 ms 46956 KB Output is correct
50 Correct 186 ms 51564 KB Output is correct
51 Correct 190 ms 50796 KB Output is correct
52 Correct 96 ms 25580 KB Output is correct
53 Correct 59 ms 15468 KB Output is correct
54 Correct 139 ms 9324 KB Output is correct
55 Correct 195 ms 49260 KB Output is correct
56 Correct 150 ms 24044 KB Output is correct
57 Correct 148 ms 20460 KB Output is correct
58 Correct 155 ms 22124 KB Output is correct
59 Correct 186 ms 30316 KB Output is correct
60 Correct 169 ms 30316 KB Output is correct
61 Correct 728 ms 95468 KB Output is correct
62 Correct 744 ms 92268 KB Output is correct
63 Correct 803 ms 114412 KB Output is correct
64 Correct 914 ms 240500 KB Output is correct
65 Correct 907 ms 259564 KB Output is correct
66 Correct 947 ms 257388 KB Output is correct
67 Correct 756 ms 205932 KB Output is correct
68 Correct 377 ms 103148 KB Output is correct
69 Correct 688 ms 45804 KB Output is correct
70 Correct 950 ms 252012 KB Output is correct
71 Correct 731 ms 91884 KB Output is correct
72 Correct 755 ms 115820 KB Output is correct
73 Correct 802 ms 150508 KB Output is correct
74 Correct 816 ms 171756 KB Output is correct
75 Correct 826 ms 171756 KB Output is correct