Submission #1139524

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139524		steveonalex	Teams (IOI15_teams)	C++20	100 / 100	729 ms	227432 KiB

teams

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }
#include "teams.h"
const int N = MASK(19);

struct PST{
    struct Node{
        int val;
        int child[2];
        Node(){val = 0; memset(child, -1, sizeof child);}
    };
    int n;
    vector<Node> a;
    vector<int> root_pos;
 
    PST(int _n){
        n = _n;
        a.push_back(Node());
        root_pos.push_back(0);
        build_tree(1, n, 0);
    }
 
    int get_version(){return root_pos.size();}
 
    void add_child(int &x){
        x = a.size();
        a.push_back(Node());
    }
 
    void build_tree(int l, int r, int id){
        if (l == r){a[id].val = 0; return;}
        int mid = (l + r) >> 1;
        add_child(a[id].child[0]); add_child(a[id].child[1]);
        build_tree(l, mid, a[id].child[0]);
        build_tree(mid + 1, r, a[id].child[1]);
        a[id].val = a[a[id].child[0]].val + a[a[id].child[1]].val;
    }
 
    void update(int i, int l, int r, int id, int old_id){
        a[id] = a[old_id];
        a[id].val++;
        if (l == r) return;
        int mid = (l + r) >> 1;
        if (i <= mid){
            add_child(a[id].child[0]);
            update(i, l, mid, a[id].child[0], a[old_id].child[0]);
        }
        else{
            add_child(a[id].child[1]);
            update(i, mid + 1, r, a[id].child[1], a[old_id].child[1]);
        }
    }
 
    void update(int i, int old_ver = -1){
        if (old_ver == -1) old_ver = get_version() - 1;
        int id; add_child(id);
        root_pos.push_back(id);
        int old_id = root_pos[old_ver];
        update(i, 1, n, id, old_id);
    }
 
    ll get(int u, int v, int l, int r, int id){
        if (u <= l && r <= v) return a[id].val;
        int mid = (l + r) >> 1;
        ll s1 = 0, s2 = 0;
        if (u <= mid) s1 += get(u, v, l, mid, a[id].child[0]);
        if (v > mid) s2 += get(u, v, mid + 1, r, a[id].child[1]);
        return s1 + s2;
    }
 
    ll get(int u, int v, int ver){
        return get(u, v, 1, n, root_pos[ver]);
    }
};


int n;
vector<int> query_enter[N];
PST st(N);
vector<int> ver_queue;

void init(int _n, int A[], int B[]) {
    n = _n;
    for(int i = 0; i < n; ++i){
        query_enter[A[i]].push_back(B[i]);
    } 
    ver_queue.push_back(st.get_version() - 1);
    for(int i = 1; i <= n; ++i){
        for(int j: query_enter[i]) 
            st.update(j);
        ver_queue.push_back(st.get_version() - 1);
    }
}

int can(int m, int K[]) {
    ll sum = 0;
    for(int i = 0; i < m; ++i) sum += K[i];

    if (sum > n) return 0;
    map<int,int> mp;
    for(int i= 0; i < m; ++i) mp[K[i]]++;
    
    vector<pair<int, int>> sigma(ALL(mp));

    m = sigma.size();

    int dp[m]; memset(dp, 0, sizeof dp);

    vector<int> drake;
    for(int i = 0; i < m; ++i){
        int F = sigma[i].first;
        dp[i] = sigma[i].first * sigma[i].second - st.get(F, N, ver_queue[F]);
        int ma = 0;
        vector<int> tmp;
        for(int j: drake){
            int G = sigma[j].first;
            // cout << dp[j] << " " << st.get(G, N, ver_queue[G]) << "\n";
            if (maximize(ma, dp[j] + st.get(F, N, ver_queue[G])))
              tmp.push_back(j);
        }
        dp[i] += ma;
        if (dp[i] > 0) return 0;
        drake = tmp;

        while(drake.size() && dp[drake.back()] <= dp[i]) drake.pop_back();
        drake.push_back(i);
    }
    return 1;
}

// int main(void){
//     ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
//     clock_t start = clock();

//     int n, q; cin >> n >> q;
//     int a[n], b[n];
//     for(int i = 0; i < n; ++i) cin >> a[i] >> b[i];

//     init(n, a, b);

//     while(q--){
//         int m; cin >> m;
//         int k[m];
//         for(int i = 0; i < m; ++i) cin >> k[i];
//         if (can(m, k)) cout << "YES\n";
//         else cout << "NO\n";
//     }

//     cerr << "Time elapsed: " << clock() - start << " ms\n";
//     return 0;
// }

• Subtask 1: 21 / 21
• Subtask 2: 13 / 13
• Subtask 3: 43 / 43
• Subtask 4: 23 / 23