oj.uz

답안 #796958

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
796958 2023-07-29T01:02:35 Z eltu0815 Fish 2 (JOI22_fish2) C++14
31 / 100
 1696 ms 23544 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];
    }
    if(i == 1) left.push_back({0, 0});
    
    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];
    }
    if(i == n) right.push_back({n + 1, seg1.query(1, n, 1, n, 1)});
    
    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});
        }
    }
    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); arr[0] = arr[n + 1] = inf;
    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

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12756 KB Output is correct
4 Correct 6 ms 12776 KB Output is correct
5 Incorrect 11 ms 12884 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12760 KB Output is correct
2 Correct 344 ms 22536 KB Output is correct
3 Correct 447 ms 22252 KB Output is correct
4 Correct 347 ms 22564 KB Output is correct
5 Correct 429 ms 22208 KB Output is correct
6 Correct 100 ms 20652 KB Output is correct
7 Correct 275 ms 19304 KB Output is correct
8 Correct 101 ms 20640 KB Output is correct
9 Correct 270 ms 19212 KB Output is correct
10 Correct 342 ms 19660 KB Output is correct
11 Correct 389 ms 19776 KB Output is correct
12 Correct 133 ms 20308 KB Output is correct
13 Correct 145 ms 20324 KB Output is correct
14 Correct 139 ms 22568 KB Output is correct
15 Correct 142 ms 22352 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12756 KB Output is correct
4 Correct 6 ms 12776 KB Output is correct
5 Incorrect 11 ms 12884 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12760 KB Output is correct
2 Correct 344 ms 22536 KB Output is correct
3 Correct 447 ms 22252 KB Output is correct
4 Correct 347 ms 22564 KB Output is correct
5 Correct 429 ms 22208 KB Output is correct
6 Correct 100 ms 20652 KB Output is correct
7 Correct 275 ms 19304 KB Output is correct
8 Correct 101 ms 20640 KB Output is correct
9 Correct 270 ms 19212 KB Output is correct
10 Correct 342 ms 19660 KB Output is correct
11 Correct 389 ms 19776 KB Output is correct
12 Correct 133 ms 20308 KB Output is correct
13 Correct 145 ms 20324 KB Output is correct
14 Correct 139 ms 22568 KB Output is correct
15 Correct 142 ms 22352 KB Output is correct
16 Correct 6 ms 12756 KB Output is correct
17 Correct 891 ms 22628 KB Output is correct
18 Correct 702 ms 23516 KB Output is correct
19 Correct 875 ms 22872 KB Output is correct
20 Correct 900 ms 22788 KB Output is correct
21 Correct 833 ms 22676 KB Output is correct
22 Correct 711 ms 23544 KB Output is correct
23 Correct 819 ms 22472 KB Output is correct
24 Correct 933 ms 23116 KB Output is correct
25 Correct 860 ms 22860 KB Output is correct
26 Correct 946 ms 23204 KB Output is correct
27 Correct 242 ms 21236 KB Output is correct
28 Correct 256 ms 21428 KB Output is correct
29 Correct 254 ms 21196 KB Output is correct
30 Correct 751 ms 19788 KB Output is correct
31 Correct 753 ms 19476 KB Output is correct
32 Correct 1031 ms 20352 KB Output is correct
33 Correct 629 ms 20332 KB Output is correct
34 Correct 1045 ms 19652 KB Output is correct
35 Correct 758 ms 19260 KB Output is correct
36 Correct 865 ms 20456 KB Output is correct
37 Correct 315 ms 20552 KB Output is correct
38 Correct 298 ms 20696 KB Output is correct
39 Correct 337 ms 23104 KB Output is correct
40 Correct 330 ms 22936 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12760 KB Output is correct
2 Correct 344 ms 22536 KB Output is correct
3 Correct 447 ms 22252 KB Output is correct
4 Correct 347 ms 22564 KB Output is correct
5 Correct 429 ms 22208 KB Output is correct
6 Correct 100 ms 20652 KB Output is correct
7 Correct 275 ms 19304 KB Output is correct
8 Correct 101 ms 20640 KB Output is correct
9 Correct 270 ms 19212 KB Output is correct
10 Correct 342 ms 19660 KB Output is correct
11 Correct 389 ms 19776 KB Output is correct
12 Correct 133 ms 20308 KB Output is correct
13 Correct 145 ms 20324 KB Output is correct
14 Correct 139 ms 22568 KB Output is correct
15 Correct 142 ms 22352 KB Output is correct
16 Correct 6 ms 12756 KB Output is correct
17 Incorrect 1696 ms 22736 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 6 ms 12756 KB Output is correct
3 Correct 6 ms 12756 KB Output is correct
4 Correct 6 ms 12776 KB Output is correct
5 Incorrect 11 ms 12884 KB Output isn't correct
6 Halted 0 ms 0 KB -