Submission #1247416

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247416		tvgk	Fortune Telling 2 (JOI14_fortune_telling2)	C++20	100 / 100	228 ms	18764 KiB

fortune_telling2

#include<bits/stdc++.h>
using namespace std;
#define task "a"
#define se second
#define fi first
#define ll long long
#define ii pair<ll, ll>
const long mxN = 2e5 + 7;

int n, a[mxN][3], tree[mxN * 4], q;
bool cnt[mxN * 4], ans[mxN];
vector<ii> val, querry[mxN];

void Build(int j = 1, int l = 0, int r = q)
{
    if (l == r)
    {
        tree[j] = val[l].se;
        return;
    }

    int mid = (l + r) / 2;
    Build(j * 2, l, mid);
    Build(j * 2 + 1, mid + 1, r);
    tree[j] = max(tree[j * 2], tree[j * 2 + 1]);
}

int Get(int u, int v, int j = 1, int l = 0, int r = q)
{
    if (u > val[r].fi || val[l].fi > v)
        return -1;

    if (u <= val[l].fi && val[r].fi <= v)
        return tree[j];

    int mid = (l + r) / 2;
    return max(Get(u, v, j * 2, l, mid), Get(u, v, j * 2 + 1, mid + 1, r));
}

void Upd(int vt, int j = 1, int l = 0, int r = q)
{
    if (l > vt || vt > r)
        return;

    cnt[j] ^= 1;
    if (l == r)
        return;

    int mid = (l + r) / 2;
    Upd(vt, j * 2, l, mid);
    Upd(vt, j * 2 + 1, mid + 1, r);
}

bool Get_cnt(int vt, int j = 1, int l = 0, int r = q)
{
    if (r < vt)
        return 0;

    if (vt <= l)
        return cnt[j];

    int mid = (l + r) / 2;
    return Get_cnt(vt, j * 2, l, mid) ^ Get_cnt(vt, j * 2 + 1, mid + 1, r);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen(task".INP", "r", stdin);
    //freopen(task".OUT", "w", stdout);

    cin >> n >> q;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i][0] >> a[i][1];
        if (a[i][0] > a[i][1])
        {
            swap(a[i][0], a[i][1]);
            ans[i] = 1;
        }
    }

    q--;
    for (int i = 0; i <= q; i++)
    {
        int tmp;
        cin >> tmp;
        val.push_back({tmp, i});
    }
    sort(val.begin(), val.end());
    Build();

    for (int i = 1; i <= n; i++)
    {
        int tmp = Get(a[i][0], a[i][1] - 1);
        if (tmp > 0)
            ans[i] = 1;
        querry[lower_bound(val.begin(), val.end(), ii(a[i][1], 0)) - val.begin()].push_back({i, tmp});
    }

    for (int i = q; i >= 0; i--)
    {
        Upd(val[i].se);
        for (ii j : querry[i])
            ans[j.fi] ^= Get_cnt(j.se);
    }

    ll sum = 0;
    for (int i = 1; i <= n; i++)
        sum += a[i][ans[i]];
    cout << sum;
}

• Subtask 1: 4 / 4
• Subtask 2: 31 / 31
• Subtask 3: 65 / 65