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답안 #797183

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
797183 2023-07-29T07:43:25 Z eltu0815 Fish 2 (JOI22_fish2) C++14
8 / 100
 4000 ms 46152 KB 
#include <bits/stdc++.h>
#define MAX 500005
#define MOD (ll)(1e9+7)
#define INF (ll)(1e18)
#define inf (1000000001)
 
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)) {
            assert(seg[node].empty() || (seg[node].back().first >= l && seg[node].back().second <= r));
            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];
    }
    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];
    }
    right.push_back({n + 1, seg1.query(1, n, 1, n, 1)});
    
    vector<pii> range;
    for(auto l : left) for(auto r : right) {
        if(l.first == 0 && r.first == n + 1) continue;
        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) {
            if(a.second - a.first != b.second - b.first) return a.second - a.first < b.second - b.first;
            return a.first < 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;
}

void update_query(int a, int b) {
    arr[a] = b;
    seg1.update(1, n, a, b, 1);
    seg2.update(1, n, a, b, 1);
    
    seg4.erasex(1, n, a, 1);
    update(a);
    
    if(a > 1) seg4.erasex(1, n, a - 1, 1);
    if(a > 1) update(a - 1);
    
    if(a < n) seg4.erasex(1, n, a + 1, 1);
    if(a < n) update(a + 1);
}

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_query(i, arr[i]);
    
    cin >> q;
    while(q--) {
        int t, a, b; cin >> t >> a >> b;
        if(t == 1) update_query(a, b);
        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:146:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  146 |         int mid = str + ed >> 1;
      |                   ~~~~^~~~
fish2.cpp: In function 'void update(int)':
fish2.cpp:185:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  185 |     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 12756 KB Output is correct
5 Correct 23 ms 12920 KB Output is correct
6 Correct 18 ms 12856 KB Output is correct
7 Runtime error 30 ms 25960 KB Execution killed with signal 6
8 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 2980 ms 22636 KB Output is correct
3 Correct 3903 ms 22384 KB Output is correct
4 Correct 3013 ms 22604 KB Output is correct
5 Correct 3883 ms 22460 KB Output is correct
6 Correct 309 ms 20884 KB Output is correct
7 Correct 1617 ms 19404 KB Output is correct
8 Correct 307 ms 20884 KB Output is correct
9 Correct 1791 ms 19516 KB Output is correct
10 Correct 2241 ms 19888 KB Output is correct
11 Correct 3401 ms 19968 KB Output is correct
12 Correct 715 ms 20404 KB Output is correct
13 Correct 822 ms 20424 KB Output is correct
14 Correct 535 ms 22724 KB Output is correct
15 Correct 529 ms 22460 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 12756 KB Output is correct
5 Correct 23 ms 12920 KB Output is correct
6 Correct 18 ms 12856 KB Output is correct
7 Runtime error 30 ms 25960 KB Execution killed with signal 6
8 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 2980 ms 22636 KB Output is correct
3 Correct 3903 ms 22384 KB Output is correct
4 Correct 3013 ms 22604 KB Output is correct
5 Correct 3883 ms 22460 KB Output is correct
6 Correct 309 ms 20884 KB Output is correct
7 Correct 1617 ms 19404 KB Output is correct
8 Correct 307 ms 20884 KB Output is correct
9 Correct 1791 ms 19516 KB Output is correct
10 Correct 2241 ms 19888 KB Output is correct
11 Correct 3401 ms 19968 KB Output is correct
12 Correct 715 ms 20404 KB Output is correct
13 Correct 822 ms 20424 KB Output is correct
14 Correct 535 ms 22724 KB Output is correct
15 Correct 529 ms 22460 KB Output is correct
16 Correct 6 ms 12800 KB Output is correct
17 Execution timed out 4038 ms 23072 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12756 KB Output is correct
2 Correct 2980 ms 22636 KB Output is correct
3 Correct 3903 ms 22384 KB Output is correct
4 Correct 3013 ms 22604 KB Output is correct
5 Correct 3883 ms 22460 KB Output is correct
6 Correct 309 ms 20884 KB Output is correct
7 Correct 1617 ms 19404 KB Output is correct
8 Correct 307 ms 20884 KB Output is correct
9 Correct 1791 ms 19516 KB Output is correct
10 Correct 2241 ms 19888 KB Output is correct
11 Correct 3401 ms 19968 KB Output is correct
12 Correct 715 ms 20404 KB Output is correct
13 Correct 822 ms 20424 KB Output is correct
14 Correct 535 ms 22724 KB Output is correct
15 Correct 529 ms 22460 KB Output is correct
16 Correct 6 ms 12812 KB Output is correct
17 Runtime error 3004 ms 46152 KB Execution killed with signal 6
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 12756 KB Output is correct
5 Correct 23 ms 12920 KB Output is correct
6 Correct 18 ms 12856 KB Output is correct
7 Runtime error 30 ms 25960 KB Execution killed with signal 6
8 Halted 0 ms 0 KB -