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답안 #238594

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
238594 2020-06-12T04:58:53 Z Aydarov03 Bigger segments (IZhO19_segments) C++14
100 / 100
 707 ms 35576 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

const int N = (int)1e6 + 5;
const int INF = (int)1e18;
int a[N];
int tree[N * 4], lz[N * 4];
int pref[N];
int dp[N];

void mk(int &a, int other) {
  if (!a) {
    a = other;
    return;
  }
  if (dp[a - 1] == dp[other - 1]) {
    a = max(a, other);
  }
  if (dp[a - 1] < dp[other - 1]) {
    a = other;
  }
}

int get_sum(int l, int r) {
  return pref[r] - pref[l - 1];
}

void push(int v, int tl, int tr) {
  if (!lz[v]) {
    return;
  }
  if (tl != tr) {
    mk(lz[v + v], lz[v]);
    mk(lz[v + v + 1], lz[v]);
  } else {
    int x = lz[v];
    if (dp[x - 1] + 1 == dp[tl]) {
      tree[v] = max(tree[v], lz[v]);
    }
    if (dp[x - 1] + 1 > dp[tl]) {
      tree[v] = x;
      dp[tl] = dp[x - 1] + 1;
    }
  }
}

void upd(int l, int r, int val, int v = 1, int tl = 1, int tr = N) {
  push(v, tl, tr);
  if (l <= tl && tr <= r) {
    lz[v] = val;
    push(v, tl, tr);
    return;
  }
  if (l > tr || tl > r) {
    return;
  }
  int mid = tl + tr >> 1;
  upd(l, r, val, v + v, tl, mid);
  upd(l, r, val, v + v + 1, mid + 1, tr);
}

int get(int pos, int v = 1, int tl = 1, int tr = N) {
  push(v, tl, tr);
  if (tl == tr) {
    return tree[v];
  }
  int mid = tl + tr >> 1;
  if (pos <= mid) {
    return get(pos, v + v, tl, mid);
  } else {
    return get(pos, v + v + 1, mid + 1, tr);
  }
}

void build(int v, int tl, int tr) {
  if (tl == tr) {
    tree[v] = 1;
    dp[tl] = 1;
    return;
  }
  int mid = tl + tr >> 1;
  build(v + v, tl, mid);
  build(v + v + 1, mid + 1, tr);
}

main() {
  int n;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    scanf("%lld", &a[i]);
    pref[i] = pref[i - 1] + a[i];
  }

  build(1, 1, n);

  for (int i = 1; i <= n; i++) {
    int best = get(i);
    int l = i, r = n + 1;
    while (r - l > 1) {
      int mid = l + r >> 1;
      if (get_sum(i + 1, mid) >= get_sum(best, i)) {
        r = mid;
      } else {
        l = mid;
      }
    }
    if (r <= n) {
      upd(r, n, i + 1);
    }
  }

  cout << dp[n];
}

Compilation message

segments.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int, long long int)':
segments.cpp:58:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = tl + tr >> 1;
             ~~~^~~~
segments.cpp: In function 'long long int get(long long int, long long int, long long int, long long int)':
segments.cpp:68:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = tl + tr >> 1;
             ~~~^~~~
segments.cpp: In function 'void build(long long int, long long int, long long int)':
segments.cpp:82:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = tl + tr >> 1;
             ~~~^~~~
segments.cpp: At global scope:
segments.cpp:87:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
segments.cpp: In function 'int main()':
segments.cpp:101:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
       int mid = l + r >> 1;
                 ~~^~~
segments.cpp:91:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld", &a[i]);
     ~~~~~^~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 512 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 512 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 512 KB Output is correct
32 Correct 7 ms 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 KB Output is correct
35 Correct 7 ms 640 KB Output is correct
36 Correct 8 ms 640 KB Output is correct
37 Correct 7 ms 640 KB Output is correct
38 Correct 7 ms 512 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 8 ms 640 KB Output is correct
42 Correct 7 ms 640 KB Output is correct
43 Correct 7 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 7 ms 640 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 512 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 512 KB Output is correct
32 Correct 7 ms 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 KB Output is correct
35 Correct 7 ms 640 KB Output is correct
36 Correct 8 ms 640 KB Output is correct
37 Correct 7 ms 640 KB Output is correct
38 Correct 7 ms 512 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 8 ms 640 KB Output is correct
42 Correct 7 ms 640 KB Output is correct
43 Correct 7 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 7 ms 640 KB Output is correct
46 Correct 32 ms 4736 KB Output is correct
47 Correct 116 ms 7548 KB Output is correct
48 Correct 129 ms 7928 KB Output is correct
49 Correct 121 ms 8184 KB Output is correct
50 Correct 121 ms 8160 KB Output is correct
51 Correct 138 ms 8184 KB Output is correct
52 Correct 69 ms 4216 KB Output is correct
53 Correct 41 ms 2680 KB Output is correct
54 Correct 122 ms 7416 KB Output is correct
55 Correct 126 ms 8184 KB Output is correct
56 Correct 116 ms 7672 KB Output is correct
57 Correct 122 ms 7672 KB Output is correct
58 Correct 118 ms 7740 KB Output is correct
59 Correct 116 ms 7800 KB Output is correct
60 Correct 119 ms 7732 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 512 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 512 KB Output is correct
32 Correct 7 ms 640 KB Output is correct
33 Correct 7 ms 640 KB Output is correct
34 Correct 7 ms 640 KB Output is correct
35 Correct 7 ms 640 KB Output is correct
36 Correct 8 ms 640 KB Output is correct
37 Correct 7 ms 640 KB Output is correct
38 Correct 7 ms 512 KB Output is correct
39 Correct 7 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 8 ms 640 KB Output is correct
42 Correct 7 ms 640 KB Output is correct
43 Correct 7 ms 640 KB Output is correct
44 Correct 7 ms 640 KB Output is correct
45 Correct 7 ms 640 KB Output is correct
46 Correct 32 ms 4736 KB Output is correct
47 Correct 116 ms 7548 KB Output is correct
48 Correct 129 ms 7928 KB Output is correct
49 Correct 121 ms 8184 KB Output is correct
50 Correct 121 ms 8160 KB Output is correct
51 Correct 138 ms 8184 KB Output is correct
52 Correct 69 ms 4216 KB Output is correct
53 Correct 41 ms 2680 KB Output is correct
54 Correct 122 ms 7416 KB Output is correct
55 Correct 126 ms 8184 KB Output is correct
56 Correct 116 ms 7672 KB Output is correct
57 Correct 122 ms 7672 KB Output is correct
58 Correct 118 ms 7740 KB Output is correct
59 Correct 116 ms 7800 KB Output is correct
60 Correct 119 ms 7732 KB Output is correct
61 Correct 158 ms 20216 KB Output is correct
62 Correct 352 ms 26540 KB Output is correct
63 Correct 606 ms 31736 KB Output is correct
64 Correct 699 ms 35192 KB Output is correct
65 Correct 637 ms 35576 KB Output is correct
66 Correct 707 ms 35364 KB Output is correct
67 Correct 538 ms 29688 KB Output is correct
68 Correct 247 ms 15992 KB Output is correct
69 Correct 664 ms 31736 KB Output is correct
70 Correct 691 ms 35576 KB Output is correct
71 Correct 619 ms 32504 KB Output is correct
72 Correct 630 ms 33164 KB Output is correct
73 Correct 646 ms 33528 KB Output is correct
74 Correct 621 ms 34040 KB Output is correct
75 Correct 635 ms 33912 KB Output is correct