Submission #972110

#	Time	Username	Problem	Language	Result	Execution time	Memory
972110		RaresFelix	The Potion of Great Power (CEOI20_potion)	C++17	38 / 100	1918 ms	262144 KiB

potion

#include <bits/stdc++.h>

using namespace std;

using ii = pair<int, int>;
using vi = vector<int>;

namespace AINTpers {
    struct nod {
        int cnt;
        int l, r; /// indici pt fii in V
    };
    vector<nod> V;

    int nod_nou() {
        V.push_back(nod{0, -1, -1});
        return int(V.size()) - 1;
    }

    int join(int u, int v) {
        int re = V.size();
        V.push_back(V[u]);
        V[re].cnt = V[u].cnt + V[v].cnt;
        V[re].l = u; V[re].r = v;
        return re;
    }

    int enable(int u, int p, int st, int dr) {
        if(u == -1) return -1;
        if(p < st || dr < p) return u;
        if(st == dr) {
            int v = V.size();
            V.push_back(V[u]);
            V[v].cnt = 1;
            return v;
        }
        if(V[u].l == -1) {
            V[u].l = nod_nou();
            V[u].r = nod_nou();
        }
        return join(enable(V[u].l, p, st, (st + dr) >> 1),
            enable(V[u].r, p, ((st + dr) >> 1) + 1, dr));
    }

    int disable(int u, int p, int st, int dr) {
        if(u == -1) return -1;
        if(p < st || dr < p) return u;
        if(st == dr) {
            int v = V.size();
            V.push_back(V[u]);
            V[v].cnt = 0;
            return v;
        }
        if(V[u].l == -1) { /// uhhh, nu ar trebuii sa ajungi aici
            assert(0); /// TODO, check if this is triggered
            V[u].l = nod_nou();
            V[u].r = nod_nou();
        }
        return join(disable(V[u].l, p, st, (st + dr) >> 1), 
            disable(V[u].r, p, ((st + dr) >> 1) + 1, dr));
    }

    int stare(int u, int p, int st, int dr) {
        if(u == -1) return 0;
        if(st == dr) return V[u].cnt;
        int mij = (st + dr) / 2;
        if(V[u].l == -1) return 0;
        if(p <= mij) return stare(V[u].l, p, st, mij);
        return stare(V[u].r, p, mij + 1, dr);
    }

    void enumerate(int u, int st, int dr, vi &Re) {
        if(u == -1 || !V[u].cnt) return;
        if(st == dr) {
            Re.push_back(st);
            return;
        }
        enumerate(V[u].l, st, (st + dr) >> 1, Re);
        enumerate(V[u].r, ((st + dr) >> 1) + 1, dr, Re);
    }
}

struct SetPers {
    int n;
    vector<ii> Rad;

    SetPers(int N) : n(N) {
        Rad.emplace_back(0, AINTpers::nod_nou());
    }

    void update(int t, int p) {
        int r = Rad.back().second;
        int a = AINTpers::stare(r, p, 0, n - 1);
        if(!a) {
            Rad.push_back({t, AINTpers::enable(r, p, 0, n - 1)});
        } else {
            Rad.push_back({t, AINTpers::disable(r, p, 0, n - 1)});
        }
    }

    vi list(int t) {
        auto it = upper_bound(Rad.begin(), Rad.end(), ii{t, 1e9});
        --it;
        int r = it->second;
        vi Re;
        AINTpers::enumerate(r, 0, n - 1, Re);
        return Re;
    }
};

int n;
vi H0;

vector<SetPers> S;

void init(int N, int D, int H[]) {
    n = N;
    for(int i = 0; i < n; ++i) H0.push_back(H[i]); 
    for(int i = 0; i < n; ++i)
        S.push_back(SetPers(N));
}

void curseChanges(int U, int A[], int B[]) {
    for(int i = 1; i <= U; ++i) {
        int a = A[i - 1], b = B[i - 1];
        S[a].update(i, b);
        S[b].update(i, a);
    }
}

const int INF = 1e9;

int question(int x, int y, int v) {
    vi A = S[x].list(v), B = S[y].list(v);
    vector<ii> V;
    for(auto it : A)
        V.push_back(ii{H0[it], -1});
    for(auto it : B)
        V.push_back(ii{H0[it], 1});
    sort(V.begin(), V.end());
    int re = INF;
    for(int i = 1; i < V.size(); ++i) {
        if(V[i].second != V[i - 1].second) 
            re = min(re, V[i].first - V[i - 1].first);
    }
    return re;
}

Compilation message (stderr)

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:142:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |     for(int i = 1; i < V.size(); ++i) {
      |                    ~~^~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 17 / 17
• Subtask 3: 0 / 14
• Subtask 4: 0 / 18
• Subtask 5: 21 / 21
• Subtask 6: 0 / 30