Submission #1091864

#	Time	Username	Problem	Language	Result	Execution time	Memory
1091864		_8_8_	Super Dango Maker (JOI22_dango3)	C++17	100 / 100	514 ms	3016 KiB

dango3

#include "dango3.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;
    
int n, m;
const int N = 401;
bool bad[N * 26];
int B = -1;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
unordered_map<ll, int> mem;

int qr(vector<int> &f) {
    ll it = 163, p = 163, mod = (ll)1e11 + 7, h = 0;
    for(int i:f) {
        h += it * 1ll * i % mod;
        if(h >= mod) h -= mod;
        it = it * p % mod;
    }
    if(mem.count(h)) return mem[h];
    return mem[h] = Query(f);
}
vector<int> get(vector<int> &a) {
    vector<int> b;
    int l = -1,r = (int)a.size() - 1;
    while(r - l > 1) {
        int mid = (l + r) >> 1;
        vector<int> t;
        for(int j = 0; j <= mid; j++) {
            t.push_back(a[j]);
        }
        if(qr(t)) {
            r = mid;
        } else {
            l = mid;
        }
    }
    for(int i = 0;i <= r; i++) {
        b.push_back(a[i]);
    }
    reverse(b.begin(), b.end());
    vector<int> c;
    for(int i = 0; i < (int)b.size(); i++) {
        vector<int> t = c;
        for(int j = i + 1; j < (int)b.size(); j++) {
            t.push_back(b[j]);
        }
        if(!qr(t)) {
            c.push_back(b[i]);
        }
    }
    return c;
}
int timer = 0, vis[N * 26];
void Solve(int _n, int _m) {
    n = _n, m = _m;
    vector<int> f, bf;
    for(int i = 1; i <= n * m; i++) {
        f.push_back(i);
    }
    shuffle(f.begin(), f.end(), rng);
    for(int i = 0; i < m; i++) {
        timer++;    
        vector<int> nv = get(f);
        Answer(nv);
        bf.push_back(nv[0]);
        for(int j = 0; j < n; j++) {
            vis[nv[j]] = timer;
        }
        vector<int> sw;
        for(int j:f) {
            if(vis[j] != timer) {
                sw.push_back(j);
            }
        }
        f = sw;
        shuffle(f.begin(), f.end(), rng);
    }
}

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 78 / 78