Submission #701568

#	Time	Username	Problem	Language	Result	Execution time	Memory
701568		abysmal	Fish 2 (JOI22_fish2)	C++14	13 / 100	4058 ms	4556 KiB

fish2

#include<iostream>
#include<stdio.h>
#include<stdint.h>
#include<vector>
#include<algorithm>
#include<utility>
#include<set>
#include<map>
#include<queue>
#include<stack>
#include<deque>
#include<string>
#include<assert.h>
#include<math.h>
#include<chrono>
#include<random>
#include<bitset>
#include<time.h>
#include<iomanip>

using namespace std;

const int64_t INF = (int64_t) 5 * 1e5 + 5;
const int64_t mINF = (int64_t) 1e9 + 5;
const int64_t MOD = (int64_t) 1e9 + 9;
const int nbit = 30;
const int ndig = 10;
const int nchar = 26;
const int p1 = 31;
const int p2 = 53;
const int D = 4;
int dr[D] = {0, 1, 0, -1};
int dc[D] = {1, 0, -1, 0};
// 0 right // 1 down // 2 left // 3 up

struct Solution
{
    int n;
    vector<int> a;
    vector<int64_t> bit;
    vector<int64_t> tree;
    Solution() {}

    void solve()
    {
        cin >> n;
        a.resize(n, 0);
        bit.resize(n + 1, 0);
        for(int i = 0; i < n; i++)
        {
            int val;
            cin >> val;

            update(i + 1, val);
        }

        while(__builtin_popcount(n) != 1) n++;
        tree.resize(2 * n, 0);

        for(int i = 0; i < (int) a.size(); i++)
        {
            tree[n + i] = a[i];
        }

        for(int i = n - 1; i >= 1; i--)
        {
            tree[i] = max(tree[i * 2], tree[i * 2 + 1]);
        }

        int q;
        cin >> q;
        for(int i = 0; i < q; i++)
        {
            int t;
            cin >> t;

            if(t == 1)
            {
                int id;
                int64_t x;
                cin >> id >> x;

                update(id, x);
                updateTree(id - 1);
            }
            else
            {
                int l;
                int r;
                cin >> l >> r;
                l--; r--;

                int ans = 0;
                for(int j = l; j <= r; j++)
                {
                    if(check(j, l, r)) ans++;
                }

                cout << ans << "\n";
            }
        }
    }

    bool check(int id, int left, int right)
    {
        int x = id;
        int y = id;

        int64_t tmp = a[id];
        while(x != left || y != right)
        {
            int l = left;
            int r = x;
            int i = x;
            while(l <= r)
            {
                int mid = l + (r - l) / 2;

                int64_t max_ = get(1, 0, n - 1, mid, x);
                if(max_ <= tmp)
                {
                    i = mid;
                    r = mid - 1;
                }
                else l = mid + 1;
            }

            tmp += sum(x) - sum(i);
            l = y;
            r = right;
            int j = y;
            while(l <= r)
            {
                int mid = l + (r - l) / 2;
                int64_t max_ = get(1, 0, n - 1, y, mid);

                if(max_ <= tmp)
                {
                    j = mid;
                    l = mid + 1;
                }
                else r = mid - 1;
            }

            tmp += sum(j + 1) - sum(y + 1);
            if(x == i && y == j) break;
            x = i; y = j;
        }

        return (x == left && y == right);
    }

    int64_t sum(int i)
    {
        int64_t ans = 0;
        while(i > 0)
        {
            ans += bit[i];

            i -= (i & (-i));
        }

        return ans;
    }

    int64_t get(int node, int nleft, int nright, int left, int right)
    {
        if(nleft > right || nright < left) return 0;
        if(left <= nleft && nright <= right) return tree[node];

        int mid = nleft + (nright - nleft) / 2;
        return max(get(node * 2, nleft, mid, left, right),
                   get(node * 2 + 1, mid + 1, nright, left, right));
    }

    void updateTree(int i)
    {
        tree[n + i] = a[i];

        for(int j = (n + i) / 2; j >= 1; j /= 2)
        {
            tree[j] = max(tree[j * 2], tree[j * 2 + 1]);
        }
    }

    void update(int i, int64_t val)
    {
        int64_t tmp = val - a[i - 1];
        a[i - 1] = val;
        while(i < (int) bit.size())
        {
            bit[i] += tmp;

            i += (i & (-i));
        }
    }

    int modsub(int t1, int t2)
    {
        int res = t1 - t2;
        if(res < 0) res += MOD;

        return res;
    }

    int modadd(int t1, int t2)
    {
        int res = t1 + t2;
        if(res >= MOD) res -= MOD;

        return res;
    }

    int modmul(int t1, int t2)
    {
        int64_t res = 1LL * t1 * t2;
        return (res % MOD);
    }

    bool BIT(int mask, int j)
    {
        return (mask & MASK(j));
    }

    int64_t MASK(int j)
    {
        return (1LL << j);
    }

    int64_t Abs(int64_t t1)
    {
        if(t1 < 0) return -t1;
        return t1;
    }
};

void __startup()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

//    freopen("in.txt", "r", stdin);
//    freopen("out.txt", "w", stdout);
}

int main()
{
    __startup();
    int t = 1;
//    cin >> t;

    for(int i = 1; i <= t; i++)
    {
        Solution().solve();
    }

    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 12
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 17