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답안 #1097295

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1097295 2024-10-06T18:53:32 Z DaciejMaciej Regions (IOI09_regions) C++17
0 / 100
 3380 ms 114008 KB 
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// #include <ext/rope>

using namespace std;
// using namespace __gnu_pbds;

typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef long double ld;

template <class T>

using VV = vector<vector<T>>;

using VI = vector<int>;
using VVI = vector<vector<int>>;

using VL = vector<long long>;
using VVL = vector<vector<long long>>;

using VC = vector<char>;
using VVC = vector<vector<char>>;

using VB = vector<bool>;
using VVB = vector<vector<bool>>;

using VD = vector<double>;
using VVD = vector<vector<double>>;

using PII = pair<int, int>;
using PLL = pair<long long, long long>;
using PIL = pair<int, long long>;
using PLI = pair<long long, int>;

using VPII = vector<pair<int, int>>;
using VPLL = vector<pair<long long, long long>>;

#define LINE '\n'
#define SPACE ' '
#define PB push_back
#define FOR(i, a, b) for (int i = (a); i < (int(b)); i++)
#define FORE(i, a, b) for (int i = (a); i <= (int)((b)); i++)
#define ALL(x) x.begin(), x.end()
#define RALL(x) x.rbegin(), x.rend()
#define sq(a) ((a) * (a))
#define sz(x) ((int)x.size())

#define fastio()                      \
    ios_base::sync_with_stdio(false); \
    cin.tie(nullptr);                 \
    cout.tie(nullptr)
#define debug(x) cerr << #x << " = " << x << endl;

// zero indexed
template <class T>
struct SegTree
{
    const T def = 0;
    int n;
    vector<T> seg;

    SegTree(int _size) : n(_size), seg(2 * _size, def) {}

    inline T merge(T a, T b)
    {
        return max(a, b);
    }

    void update(int pos, T val)
    {
        for (seg[pos += n] = val; pos /= 2;)
        {
            seg[pos] = merge(seg[pos * 2], seg[pos * 2 + 1]);
        }
    }

    T query(int l, int r) // get [l, r]
    {
        T a = def, b = def;
        for (l += n, r += n + 1; l < r; l /= 2, r /= 2)
        {
            if (l % 2)
                a = merge(a, seg[l++]);
            if (r % 2)
                b = merge(b, seg[--r]);
        }
        return merge(a, b);
    }
};

template <class T>
struct BIT
{
    int size;
    vector<T> bit;
    vector<T> arr;

    BIT(int _size) : size(_size), bit(_size + 1), arr(_size) {}

    void set(int pos, T val)
    {
        add(pos, val - arr[pos]);
    }
    void add(int pos, T val)
    {
        arr[pos] += val;

        for (pos++; pos <= size; pos += pos & -pos)
        {
            bit[pos] += val;
        }
    }
    T query(int pos)
    {
        T res = 0;
        for (pos++; pos > 0; pos -= pos & -pos)
        {
            res += bit[pos];
        }
        return res;
    }
};

const ll MOD = 1e9 + 7;

template <class T>
inline void maxi(T &a, T b)
{
    a = max(a, b);
}

template <class T>
inline void mini(T &a, T b)
{
    a = min(a, b);
}

template <class T>
inline void addi(T &a, T b)
{
    a = (a + b) % MOD;
}

template <class T>
inline void subi(T &a, T b)
{
    a = (a - b + MOD) % MOD;
}

template <class T>
inline T add(T a, T b)
{
    return (a + b) % MOD;
}

template <class T>
inline T sub(T a, T b)
{
    return (a - b + MOD) % MOD;
}

template <class T>
inline T mul(T a, T b)
{
    return ((a % MOD) * (b % MOD)) % MOD;
}

constexpr ll binpow(ll a, ll b, ll mod)
{
    ll res = 1;
    while (b > 0)
    {
        if (b & 1)
        {
            res = (res * a) % mod;
        }
        a = (a * a) % mod;
        b >>= 1;
    }

    return res;
}

const int INF = 1e9;

const int MAX_N = 1e5 + 3;

void solve()
{
    int n, r, q;
    cin >> n >> r >> q;
    VI region(r);
    VV<int> g(n);
    cin >> region[0];
    region[0]--;    
    FOR(i, 1, n) {
        int p, h;
        cin >> p >> h;
        p--, h--;
        g[p].PB(i);
        region[i] = h;
    }
    
    /*
    tin - in time
    tout - out time
    rtin - rtin[tin[u]] = u
    rg - for each region list of tin vecs
    */
    VI tin(n), tout(n), rtin(n);
    VV<int> rg(r);
    int t = 0;
    function<void(int)> dfs = [&](int c) -> void {
        tin[c] = ++t;
        rtin[tin[c]] = c;
        rg[region[c]].PB(tin[c]);
        for(auto v : g[c]) dfs(v);
        tout[c] = ++t;
    };
    dfs(0);

    const int BS = sqrt(n);
    VV<int> pre; // pre[id][reg] = ans for query a, b
    VI rid(r, -1); // compress regions ids
    int id = 0;

    function<void(int, int, int)> dfs2 = [&](int c, int pr, int p_size) -> void {
        if(region[c] == pr) p_size++;
        pre[rid[pr]][region[c]] += p_size;
        for(auto v : g[c]) dfs2(v, pr, p_size);
    };

    FOR(i, 0, r) {
        if(sz(rg[i]) < BS) continue;
        rid[i] = id;
        pre.PB(VI(r));
        dfs2(0, i, 0);
        id++;
    }

    FOR(i, 0, q) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        if(rid[a] != -1) {
            cout << pre[rid[a]][b] << endl;
        }
        else {
            int rs = 0;
            for(auto v : rg[a]) { // v is the in time for region a
                rs += lower_bound(ALL(rg[b]), tout[rtin[v]]) - 
                    lower_bound(ALL(rg[b]), tin[rtin[v]]);
            }
            cout << rs << endl;
        }
    }
}

int main()
{
    fastio();

    int t = 1;
    // cin >> t;

    while (t--)
        solve();
}

Subtask #1
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1 ms 344 KB Execution killed with signal 11
2 Runtime error 0 ms 344 KB Execution killed with signal 11
3 Runtime error 1 ms 344 KB Execution killed with signal 11
4 Runtime error 0 ms 600 KB Execution killed with signal 11
5 Runtime error 1 ms 600 KB Execution killed with signal 11
6 Runtime error 1 ms 600 KB Execution killed with signal 11
7 Runtime error 1 ms 600 KB Execution killed with signal 11
8 Runtime error 1 ms 856 KB Execution killed with signal 11
9 Runtime error 1 ms 1112 KB Execution killed with signal 11
10 Runtime error 3 ms 3160 KB Execution killed with signal 11
11 Runtime error 4 ms 4696 KB Execution killed with signal 11
12 Runtime error 6 ms 6232 KB Execution killed with signal 11
13 Runtime error 72 ms 2976 KB Execution killed with signal 6
14 Runtime error 10 ms 8536 KB Execution killed with signal 11
15 Runtime error 19 ms 23100 KB Execution killed with signal 11

Subtask #2
0 / 85.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 41 ms 41360 KB Execution killed with signal 11
2 Runtime error 576 ms 7480 KB Execution killed with signal 6
3 Runtime error 51 ms 49348 KB Execution killed with signal 11
4 Runtime error 9 ms 9048 KB Execution killed with signal 11
5 Runtime error 288 ms 9044 KB Execution killed with signal 6
6 Runtime error 28 ms 29512 KB Execution killed with signal 11
7 Runtime error 37 ms 38608 KB Execution killed with signal 11
8 Runtime error 51 ms 58192 KB Execution killed with signal 11
9 Runtime error 826 ms 16612 KB Execution killed with signal 6
10 Runtime error 3380 ms 42300 KB Execution killed with signal 6
11 Runtime error 1272 ms 17640 KB Execution killed with signal 11
12 Runtime error 100 ms 105624 KB Execution killed with signal 11
13 Runtime error 117 ms 103704 KB Execution killed with signal 11
14 Runtime error 104 ms 113176 KB Execution killed with signal 11
15 Runtime error 1984 ms 35828 KB Execution killed with signal 6
16 Runtime error 3299 ms 60516 KB Execution killed with signal 6
17 Runtime error 110 ms 114008 KB Execution killed with signal 11