Submission #256314

#	Time	Username	Problem	Language	Result	Execution time	Memory
256314		Sorting	Game (IOI13_game)	C++17	0 / 100	1 ms	384 KiB

game

#include "game.h"
#include <bits/stdc++.h>

using namespace std;

const int k_Inf = 1e9;

long long gcd2(long long X, long long Y) {
    long long tmp;
    while (X != Y && Y != 0) {
        tmp = X;
        X = Y;
        Y = tmp % Y;
    }
    return X;
}

struct SegmentTree{
    vector<long long> nodes;
    vector<int> left, right;

    void get_new_node(){
        nodes.push_back(0);
        left.push_back(-1);
        right.push_back(-1);
    }

    void build_kids(int idx){
        if(left[idx] == -1){
            get_new_node();
            left[idx] = nodes.size() - 1;
            get_new_node();
            right[idx] = nodes.size() - 1;
        }
    }

    SegmentTree(){
        get_new_node();
    }

    void clear(){
        nodes.clear();
        left.clear();
        right.clear();
        get_new_node();
    }

    void update(int idx, int l, int r, int s, long long new_val){
        if(s < l || r < s) return;
        if(l == r){
            nodes[idx] = new_val;
            return;
        }

        build_kids(idx);

        int mid = (l + r) >> 1;
        update(left[idx], l, mid, s, new_val);
        update(right[idx], mid + 1, r, s, new_val);

        nodes[idx] = gcd2(nodes[left[idx]], nodes[right[idx]]);
    }

    long long query(int idx, int l, int r, int sl, int sr){
        if(sl > r || sr < l) return 0;
        if(sl <= l && r <= sr) return nodes[idx];

        if(left[idx] == -1)
            return 0;

        int mid = (l + r) >> 1;
        long long lvalue = query(left[idx], l, mid, sl, sr);
        long long rvalue = query(right[idx], mid + 1, r, sl, sr);
        return gcd2(lvalue, rvalue);
    }

    friend void merge(SegmentTree &st1, SegmentTree &st2, SegmentTree &ans, int idx1, int idx2, int idx3){
        if((idx1 == -1 || st1.left[idx1] == -1) && (idx2 == -1 || st2.left[idx2] == -1)){
            if(idx1 == -1) ans.nodes[idx3] = st2.nodes[idx2]; 
            else if(idx2 == -1) ans.nodes[idx3] = st1.nodes[idx1];
            else ans.nodes[idx3] = gcd2(st1.nodes[idx1], st2.nodes[idx2]);
            return;
        }

        ans.build_kids(idx3);

        if(idx1 == -1 || st1.left[idx1] == -1){
            merge(st1, st2, ans, -1, st2.left[idx2], ans.left[idx3]);
            merge(st1, st2, ans, -1, st2.right[idx2], ans.right[idx3]);
        }
        else if(idx2 == -1 || st2.left[idx2] == -1){
            merge(st1, st2, ans, st1.left[idx1], -1, ans.left[idx3]);
            merge(st1, st2, ans, st1.right[idx1], -1, ans.right[idx3]);
        }
        else{
            merge(st1, st2, ans, st1.left[idx1], st2.left[idx2], ans.left[idx3]);
            merge(st1, st2, ans, st1.right[idx1], st2.right[idx2], ans.right[idx3]);
        }

        ans.nodes[idx3] = gcd2(ans.nodes[ans.left[idx3]], ans.nodes[ans.right[idx3]]);
    }
};

struct SegmentTree2D{
    vector<SegmentTree*> nodes;
    vector<int> left, right;

    void get_new_node(){
        nodes.push_back(new SegmentTree());
        left.push_back(-1);
        right.push_back(-1);
    }

    void build_kids(int idx){
        if(left[idx] == -1){
            get_new_node();
            left[idx] = nodes.size() - 1;
            get_new_node();
            right[idx] = nodes.size() - 1;
        }
    }

    SegmentTree2D(){
        get_new_node();
    }

    void update(int idx, int l, int r, int x, int y, long long new_val){
        if(x < l || r < x) return;
        if(l == r){
            nodes[idx]->update(0, 0, k_Inf, y, new_val);
            return;
        }

        build_kids(idx);

        int mid = (l + r) >> 1;
        update(left[idx], l, mid, x, y, new_val);
        update(right[idx], mid + 1, r, x, y, new_val);

        //nodes[idx]->update(0, 0, k_Inf, y, new_val);
    }

    long long query(int idx, int l1, int r1, int sl1, int sr1, int sl2, int sr2){
        if(sl1 > r1 || sr1 < l1) return 0;
        if(sl1 <= l1 && r1 <= sr1) return nodes[idx]->query(0, 0, k_Inf, sl2, sr2);

        if(left[idx] == -1)
            return 0;

        int mid = (l1 + r1) >> 1;
        long long lvalue = query(left[idx], l1, mid, sl1, sr1, sl2, sr2);
        long long rvalue = query(right[idx], mid + 1, r1, sl1, sr1, sl2, sr2);
        return gcd2(lvalue, rvalue);
    }

    void merge_up(int idx, int l, int r){
        if(left[idx] == -1) return;

        int mid = (l + r) >> 1; 
        merge_up(left[idx], l, mid);
        merge_up(right[idx], mid + 1, r);

        nodes[idx]->clear();
        merge(*nodes[left[idx]], *nodes[right[idx]], *nodes[idx], 0, 0, 0);
    }
};


int r, c;
SegmentTree2D st;

const int k_B = 200;

vector<array<long long, 3>> updates;

void init(int _r, int _c) {
    r = _r, c = _c;
}

void update(int p, int q, long long k) {
    st.update(0, 0, k_Inf, p, q, k);
    updates.push_back({p, q, k});
    if(updates.size() >= k_B){
        updates.clear();
        st.merge_up(0, 0, k_Inf);
    }
}

long long calculate(int p, int q, int u, int v) {
    long long ans = st.query(0, 0, k_Inf, p, u, q, v);
    for(auto [x, y, k]: updates)
        if(p <= x && x <= u && q <= y && y <= v)
            ans = gcd2(ans, k);
    return ans;
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:18:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 26
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20