Submission #1127923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1127923		Icelast	Fortune Telling 2 (JOI14_fortune_telling2)	C++20	100 / 100	420 ms	49072 KiB

fortune_telling2

#include <iostream>
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const ll maxn = 2*1e5+5, INF = 4e18+9;
template<class Info, class Tag>
struct LazySegmentTree {
    int n;
    vector<Info> info;
    vector<Tag> tag;
    LazySegmentTree() : n(0) {}
    LazySegmentTree(int n_, Info v_ = Info()) {
        init(n_, v_);
    }
    template<class T>
    LazySegmentTree(vector<T> init_) {
        init(init_);
    }
    void init(int n_, Info v_ = Info()) {
        init(vector<Info>(n_, v_));
    }
    template<class T>
    void init(vector<T> init_) {
        n = init_.size();
        info.assign(4 << __lg(n), Info());
        tag.assign(4 << __lg(n), Tag());
        function<void(int, int, int)> build = [&](int p, int l, int r) {
            if (r - l == 1) {
                info[p] = init_[l];
                return;
            }
            int m = (l + r) / 2;
            build(2 * p, l, m);
            build(2 * p + 1, m, r);
            pull(p);
        };
        build(1, 0, n);
    }
    void pull(int p) {
        info[p] = info[2 * p] + info[2 * p + 1];
    }
    void apply(int p, const Tag &v) {
        info[p].apply(v);
        tag[p].apply(v);
    }
    void push(int p) {
        apply(2 * p, tag[p]);
        apply(2 * p + 1, tag[p]);
        tag[p] = Tag();
    }
    void modify(int p, int l, int r, int x, const Info &v) {
        if (r - l == 1) {
            info[p] = v;
            return;
        }
        int m = (l + r) / 2;
        push(p);
        if (x < m) {
            modify(2 * p, l, m, x, v);
        } else {
            modify(2 * p + 1, m, r, x, v);
        }
        pull(p);
    }
    void modify(int p, const Info &v) {
        modify(1, 0, n, p, v);
    }
    Info rangeQuery(int p, int l, int r, int x, int y) {
        if (l >= y || r <= x) {
            return Info();
        }
        if (l >= x && r <= y) {
            return info[p];
        }
        int m = (l + r) / 2;
        push(p);
        return rangeQuery(2 * p, l, m, x, y) + rangeQuery(2 * p + 1, m, r, x, y);
    }
    Info rangeQuery(int l, int r) {
        return rangeQuery(1, 0, n, l, r);
    }
    void rangeApply(int p, int l, int r, int x, int y, const Tag &v) {
        if (l >= y || r <= x) {
            return;
        }
        if (l >= x && r <= y) {
            apply(p, v);
            return;
        }
        int m = (l + r) / 2;
        push(p);
        rangeApply(2 * p, l, m, x, y, v);
        rangeApply(2 * p + 1, m, r, x, y, v);
        pull(p);
    }
    void rangeApply(int l, int r, const Tag &v) {
        return rangeApply(1, 0, n, l, r, v);
    }
    template<class F>
    int findFirst(int p, int l, int r, int x, int y, F &&pred) {
        if (l >= y || r <= x) {
            return -1;
        }
        if (l >= x && r <= y && !pred(info[p])) {
            return -1;
        }
        if (r - l == 1) {
            return l;
        }
        int m = (l + r) / 2;
        push(p);
        int res = findFirst(2 * p, l, m, x, y, pred);
        if (res == -1) {
            res = findFirst(2 * p + 1, m, r, x, y, pred);
        }
        return res;
    }
    template<class F>
    int findFirst(int l, int r, F &&pred) {
        return findFirst(1, 0, n, l, r, pred);
    }
    template<class F>
    int findLast(int p, int l, int r, int x, int y, F &&pred) {
        if (l >= y || r <= x) {
            return -1;
        }
        if (l >= x && r <= y && !pred(info[p])) {
            return -1;
        }
        if (r - l == 1) {
            return l;
        }
        int m = (l + r) / 2;
        push(p);
        int res = findLast(2 * p + 1, m, r, x, y, pred);
        if (res == -1) {
            res = findLast(2 * p, l, m, x, y, pred);
        }
        return res;
    }
    template<class F>
    int findLast(int l, int r, F &&pred) {
        return findLast(1, 0, n, l, r, pred);
    }
};

struct Tag {
    int mx = 0;
    void apply(const Tag &t) & {
        mx = max(mx, t.mx);
    }
};

struct Info {
    int mx = 0;
    void apply(const Tag &t) & {
        mx = max(mx, t.mx);
    }
    Info operator+(const Info &b) {
        return {max(mx, b.mx)};
    }
};
struct card{
    ll a, b, wa, wb, t = 0;
};
struct normalize{
    vector<ll> poi, pot;
    void add(ll x){
        poi.push_back(x);
    }
    void start(){
        sort(poi.begin(), poi.end());
        if(poi.size() > 0) pot.push_back(poi[0]);
        for(int i = 1; i < (int)poi.size(); i++){
            if(poi[i] != poi[i-1]){
                pot.push_back(poi[i]);
            }
        }
    }
    int encode(ll x){
        return lower_bound(pot.begin(), pot.end(), x) - pot.begin()+1;
    }
};
template <class T>
struct Fenwick {
    int n, log;
    vector<T> bit;

    Fenwick(int n) : n(n), log(32 - __builtin_clz(n + 1)), bit(n + 1, 0) {}

    void add(int i, T delta) {
        for (; i <= n; i += i & -i) {
            bit[i] += delta;
        }
    }

    T sum(int i) {
        T res = 0;
        for (; i > 0; i -= i & -i) {
            res += bit[i];
        }
        return res;
    }
    T sum(int l, int r) {
        return sum(r)-sum(l-1);
    }
    int kth(T k) {
        T sum = 0;
        int pos = 0;
        for (int l = log - 1; l >= 0; l--) {
            if (pos + (1 << l) <= n && sum + bit[pos + (1 << l)] <= k) {
                pos += 1 << l;
                sum += bit[pos];
            }
        }
        return pos;
    }
};
void solve(){
    int n, k;
    cin >> n >> k;
    vector<card> a(n+1);
    normalize norm;
    for(int i = 1; i <= n; i++){
        cin >> a[i].a >> a[i].b;
        if(a[i].a > a[i].b){
            swap(a[i].a, a[i].b);
            a[i].t = 1;
        }
        norm.add(a[i].a);
        norm.add(a[i].b);
        a[i].wa = a[i].a; a[i].wb = a[i].b;
    }
    vector<ll> q(k+1);
    for(int i = 1; i <= k; i++){
        cin >> q[i];
        norm.add(q[i]);
    }
    norm.start();
    for(int i = 1; i <= n; i++){
        a[i].a = norm.encode(a[i].a);
        a[i].b = norm.encode(a[i].b);
    }
    for(int i = 1; i <= k; i++){
        q[i] = norm.encode(q[i]);
    }
    int N = norm.pot.size();
    LazySegmentTree<Info, Tag> T(N+1);
    for(int i = 1; i <= k; i++){
        T.rangeApply(q[i], q[i]+1, {i});
    }
    vector<int> p(n+1, 0);
    struct event{
        ll v, id;
    };
    vector<vector<event>> sweep(k+2);
    for(int i = 1; i <= n; i++){
        p[i] = T.rangeQuery(a[i].a, a[i].b).mx;
        sweep[p[i]+1].push_back({a[i].b, i});
    }
    vector<int> side(n+1, 0);
    Fenwick<int> bit(N+1);
    for(int i = k; i >= 1; i--){
        bit.add(q[i], 1);
        for(auto it : sweep[i]){
            side[it.id] = bit.sum(it.v, N)%2;
        }
    }
    ll ans = 0;
    for(int i = 1; i <= n; i++){
        if(p[i] == 0){
            side[i] ^= a[i].t;
            if(side[i]){
                ans += a[i].wb;
            }else{
                ans += a[i].wa;
            }
        }else{
            if(side[i]){
                ans += a[i].wa;
            }else{
                ans += a[i].wb;
            }
        }
    }
    cout << ans;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //freopen("main.inp", "r", stdin);
    //freopen("main.out", "w", stdout);
    solve();
}

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