oj.uz

Submission #796955

# Submission time Handle Problem Language Result Execution time Memory
796955 2023-07-29T00:46:40 Z eltu0815 Fish 2 (JOI22_fish2) C++14
31 / 100
 1515 ms 23636 KB 
#include <bits/stdc++.h>
#define MAX 500005
#define MOD (ll)(1e9+7)
#define INF (ll)(1e18)
#define inf (1987654321)
 
using namespace std;    
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
 
int n, q;
int arr[100005];

struct SEG1 {
    ll seg[400005];
    void update(int str, int ed, int idx, ll val, int node) {
        if(str == ed) {
            seg[node] = val;
            return;
        }
        int mid = str + ed >> 1;
        if(idx <= mid) update(str, mid, idx, val, node << 1);
        else update(mid + 1, ed, idx, val, node << 1 | 1);
        seg[node] = seg[node << 1] + seg[node << 1 | 1];
    }
    ll query(int str, int ed, int left, int right, int node) {
        if(str > right || ed < left) return 0;
        if(left <= str && ed <= right) return seg[node];
        int mid = str + ed >> 1;
        return query(str, mid, left, right, node << 1) + query(mid + 1, ed, left, right, node << 1 | 1);
    }
} seg1;

struct SEG2 {
    int seg[400005];
    void update(int str, int ed, int idx, int val, int node) {
        if(str == ed) {
            seg[node] = val;
            return;
        }
        int mid = str + ed >> 1;
        if(idx <= mid) update(str, mid, idx, val, node << 1);
        else update(mid + 1, ed, idx, val, node << 1 | 1);
        seg[node] = max(seg[node << 1], seg[node << 1 | 1]);
    }
    int get_mx(int str, int ed, int left, int right, int val, int node) {
        if(str > right || ed < left) return -1;
        if(seg[node] <= val) return -1;
        if(str == ed) return str;
        int mid = str + ed >> 1;
        int tmp = get_mx(mid + 1, ed, left, right, val, node << 1 | 1);
        if(tmp != -1) return tmp;
        return get_mx(str, mid, left, right, val, node << 1);
    }
    int get_mn(int str, int ed, int left, int right, ll val, int node) {
        if(str > right || ed < left) return -1;
        if(seg[node] <= val) return -1;
        if(str == ed) return str;
        int mid = str + ed >> 1;
        int tmp = get_mn(str, mid, left, right, val, node << 1);
        if(tmp != -1) return tmp;
        return get_mn(mid + 1, ed, left, right, val, node << 1 | 1);
    }
} seg2;

struct SEG3 {
    struct Node{
        int mn, cnt;
        Node() { mn = inf, cnt = 0; }
    };
    Node seg[400005];
    int lazy[400005];
    Node Merge(Node l, Node r) {
        Node ret; ret.cnt = 0;
        ret.mn = min(l.mn, r.mn);
        if(l.mn == ret.mn) ret.cnt += l.cnt;
        if(r.mn == ret.mn) ret.cnt += r.cnt;
        return ret;
    }
    void init(int str, int ed, int node) {
        lazy[node] = 0;
        if(str == ed) {
            seg[node].mn = 0, seg[node].cnt = 1;
            return;
        }
        int mid = str + ed >> 1;
        init(str, mid, node << 1);
        init(mid + 1, ed, node << 1 | 1);
        seg[node] = Merge(seg[node << 1], seg[node << 1 | 1]);
    }
    void lazyProp(int str, int ed, int node) {
        if(lazy[node]) {
            seg[node].mn += lazy[node];
            if(str != ed) {
                lazy[node << 1] += lazy[node];
                lazy[node << 1 | 1] += lazy[node];
            }
            lazy[node] = 0;
        }
    }
    void update(int str, int ed, int left, int right, int val, int node) {
        lazyProp(str, ed, node);
        if(str > right || ed < left) return;
        if(left <= str && ed <= right) {
            lazy[node] += val;
            lazyProp(str, ed, node);
            return;
        }
        int mid = str + ed >> 1;
        update(str, mid, left, right, val, node << 1);
        update(mid + 1, ed, left, right, val, node << 1 | 1);
        seg[node] = Merge(seg[node << 1], seg[node << 1 | 1]);
    }
    Node query(int str, int ed, int left, int right, int node) {
        lazyProp(str, ed, node);
        if(str > right || ed < left) return Node();
        if(left <= str && ed <= right) return seg[node];
        int mid = str + ed >> 1;
        return Merge(query(str, mid, left, right, node << 1), query(mid + 1, ed, left, right, node << 1 | 1));
    }
} seg3;

set<pii> s;
struct SEG4 {
    vector<pii> seg[400005];
    void update(int str, int ed, int l, int r, int node) {
        int mid = str + ed >> 1;
        if(str == ed || (l <= mid && r > mid)) {
            seg[node].push_back({l, r});
            seg3.update(1, n, l, r, 1, 1);
            return;
        }
        if(r <= mid) update(str, mid, l, r, node << 1);
        else update(mid + 1, ed, l, r, node << 1 | 1);
    }
    
    void erasex(int str, int ed, int x, int node) {
        while(!seg[node].empty() && seg[node].back().first <= x && x <= seg[node].back().second) {
            seg3.update(1, n, seg[node].back().first, seg[node].back().second, -1, 1);
            s.erase({seg[node].back().first, seg[node].back().second});
            seg[node].pop_back();
        }
        if(str == ed) return;
        int mid = str + ed >> 1;
        if(x <= mid) erasex(str, mid, x, node << 1);
        else erasex(mid + 1, ed, x, node << 1 | 1);
    }
} seg4;

void update(int i) {
    vector<pll> left, right;
    int j = i, sum = arr[j];
    while(j > 1) {
        j = seg2.get_mx(1, n, 1, j - 1, sum, 1);
        if(j == -1) break;
        left.push_back({j, seg1.query(1, n, 1, j, 1)});
        sum += arr[j];
    }
    
    j = i, sum = arr[j];
    while(j < n) {
        j = seg2.get_mn(1, n, j + 1, n, sum, 1);
        if(j == -1) break;
        right.push_back({j, seg1.query(1, n, 1, j - 1, 1)});
        sum += arr[j];
    }
    
    vector<pii> range;
    for(auto l : left) for(auto r : right) {
        if(r.second - l.second < min(arr[r.first], arr[l.first])) {
            range.push_back({l.first + 1, r.first - 1});
        }
    }
    if(i > 1 && seg1.query(1, n, 1, i - 1, 1) < arr[i]) range.push_back({1, i - 1});
    if(i < n && seg1.query(1, n, i + 1, n, 1) < arr[i]) range.push_back({i + 1, n});
    sort(range.begin(), range.end(), [&](auto a, auto b) {
            return a.second - a.first < b.second - b.first;
        });
    
    for(auto [l, r] : range) {
        if(s.find({l, r}) == s.end()) {
            seg4.update(1, n, l, r, 1);
            s.insert({l, r});
        }
    }
}

int compL(int i, int lim) {
    vector<int> right;
    int j = i, sum = arr[j];
    while(j < n) {
        j = seg2.get_mn(1, n, j + 1, n, sum, 1);
        if(j == -1) break;
        right.push_back(j);
        sum += arr[j];
    }
    int mx = i;
    for(auto r : right) {
        if(r <= lim && seg1.query(1, n, i, r - 1, 1) < arr[r]) mx = max(mx, r);
    }
    return mx;
}

int compR(int i, int lim) {
    vector<int> left;
    int j = i, sum = arr[j];
    while(j > 1) {
        j = seg2.get_mx(1, n, 1, j - 1, sum, 1);
        if(j == -1) break;
        left.push_back(j);
        sum += arr[j];
    }
    int mn = i;
    for(auto l : left) {
        if(l >= lim && seg1.query(1, n, l + 1, i, 1) < arr[l]) mn = min(mn, l);
    }
    return mn;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    
    cin >> n; seg3.init(1, n, 1);
    for(int i = 1; i <= n; ++i) cin >> arr[i];
    for(int i = 1; i <= n; ++i) seg1.update(1, n, i, arr[i], 1);
    for(int i = 1; i <= n; ++i) seg2.update(1, n, i, arr[i], 1);
    for(int i = 1; i <= n; ++i) update(i);
    
    cin >> q;
    while(q--) {
        int t, a, b; cin >> t >> a >> b;
        if(t == 1) {
            seg4.erasex(1, n, a, 1);
            if(a > 1) seg4.erasex(1, n, a - 1, 1);
            if(a < n) seg4.erasex(1, n, a + 1, 1);
            
            arr[a] = b;
            seg1.update(1, n, a, b, 1);
            seg2.update(1, n, a, b, 1);
            
            update(a);
            if(a > 1) update(a - 1);
            if(a < n) update(a + 1);
        }
        else {
            int l = a, r = b;
            a = compL(a, r); b = compR(b, l);
            cout << seg3.query(1, n, a, b, 1).cnt << '\n';
        }
    }
    return 0;
}

Compilation message

fish2.cpp: In member function 'void SEG1::update(int, int, int, ll, int)':
fish2.cpp:22:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'll SEG1::query(int, int, int, int, int)':
fish2.cpp:30:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'void SEG2::update(int, int, int, int, int)':
fish2.cpp:42:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'int SEG2::get_mx(int, int, int, int, int, int)':
fish2.cpp:51:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'int SEG2::get_mn(int, int, int, int, ll, int)':
fish2.cpp:60:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'void SEG3::init(int, int, int)':
fish2.cpp:87:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   87 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'void SEG3::update(int, int, int, int, int, int)':
fish2.cpp:110:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  110 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'SEG3::Node SEG3::query(int, int, int, int, int)':
fish2.cpp:119:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  119 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'void SEG4::update(int, int, int, int, int)':
fish2.cpp:128:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  128 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In member function 'void SEG4::erasex(int, int, int, int)':
fish2.cpp:145:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  145 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In function 'void update(int)':
fish2.cpp:181:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  181 |     for(auto [l, r] : range) {
      |              ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12868 KB Output is correct
4 Correct 6 ms 12756 KB Output is correct
5 Incorrect 12 ms 12924 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12864 KB Output is correct
2 Correct 363 ms 22584 KB Output is correct
3 Correct 445 ms 22272 KB Output is correct
4 Correct 361 ms 22600 KB Output is correct
5 Correct 441 ms 22228 KB Output is correct
6 Correct 118 ms 20680 KB Output is correct
7 Correct 291 ms 19272 KB Output is correct
8 Correct 118 ms 20660 KB Output is correct
9 Correct 286 ms 19312 KB Output is correct
10 Correct 360 ms 19656 KB Output is correct
11 Correct 404 ms 19724 KB Output is correct
12 Correct 151 ms 20260 KB Output is correct
13 Correct 164 ms 20304 KB Output is correct
14 Correct 158 ms 22504 KB Output is correct
15 Correct 163 ms 22356 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12868 KB Output is correct
4 Correct 6 ms 12756 KB Output is correct
5 Incorrect 12 ms 12924 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12864 KB Output is correct
2 Correct 363 ms 22584 KB Output is correct
3 Correct 445 ms 22272 KB Output is correct
4 Correct 361 ms 22600 KB Output is correct
5 Correct 441 ms 22228 KB Output is correct
6 Correct 118 ms 20680 KB Output is correct
7 Correct 291 ms 19272 KB Output is correct
8 Correct 118 ms 20660 KB Output is correct
9 Correct 286 ms 19312 KB Output is correct
10 Correct 360 ms 19656 KB Output is correct
11 Correct 404 ms 19724 KB Output is correct
12 Correct 151 ms 20260 KB Output is correct
13 Correct 164 ms 20304 KB Output is correct
14 Correct 158 ms 22504 KB Output is correct
15 Correct 163 ms 22356 KB Output is correct
16 Correct 6 ms 12756 KB Output is correct
17 Correct 887 ms 22612 KB Output is correct
18 Correct 704 ms 23636 KB Output is correct
19 Correct 875 ms 22836 KB Output is correct
20 Correct 900 ms 22668 KB Output is correct
21 Correct 841 ms 22604 KB Output is correct
22 Correct 703 ms 23580 KB Output is correct
23 Correct 821 ms 22432 KB Output is correct
24 Correct 947 ms 23076 KB Output is correct
25 Correct 853 ms 22860 KB Output is correct
26 Correct 951 ms 23084 KB Output is correct
27 Correct 270 ms 21228 KB Output is correct
28 Correct 256 ms 21232 KB Output is correct
29 Correct 272 ms 21376 KB Output is correct
30 Correct 751 ms 19564 KB Output is correct
31 Correct 760 ms 19544 KB Output is correct
32 Correct 1047 ms 20452 KB Output is correct
33 Correct 647 ms 20108 KB Output is correct
34 Correct 1045 ms 19908 KB Output is correct
35 Correct 762 ms 19168 KB Output is correct
36 Correct 876 ms 20484 KB Output is correct
37 Correct 332 ms 20572 KB Output is correct
38 Correct 323 ms 20648 KB Output is correct
39 Correct 361 ms 23156 KB Output is correct
40 Correct 342 ms 22872 KB Output is correct

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12864 KB Output is correct
2 Correct 363 ms 22584 KB Output is correct
3 Correct 445 ms 22272 KB Output is correct
4 Correct 361 ms 22600 KB Output is correct
5 Correct 441 ms 22228 KB Output is correct
6 Correct 118 ms 20680 KB Output is correct
7 Correct 291 ms 19272 KB Output is correct
8 Correct 118 ms 20660 KB Output is correct
9 Correct 286 ms 19312 KB Output is correct
10 Correct 360 ms 19656 KB Output is correct
11 Correct 404 ms 19724 KB Output is correct
12 Correct 151 ms 20260 KB Output is correct
13 Correct 164 ms 20304 KB Output is correct
14 Correct 158 ms 22504 KB Output is correct
15 Correct 163 ms 22356 KB Output is correct
16 Correct 7 ms 12756 KB Output is correct
17 Incorrect 1515 ms 22616 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12868 KB Output is correct
4 Correct 6 ms 12756 KB Output is correct
5 Incorrect 12 ms 12924 KB Output isn't correct
6 Halted 0 ms 0 KB -