Submission #1216281

#	Time	Username	Problem	Language	Result	Execution time	Memory
1216281		anfi	Hack (APIO25_hack)	C++20	0 / 100	284 ms	61828 KiB

hack

#include"hack.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
const long long inf = 1e9;

int ans(int l, int r){
    while(l < r){
        int m = (l+r)>>1;
        int c = sqrtl(m-l+1);
        vector<int> q;
        for(int i = 1; i <= c; i++) q.push_back(i);
        for(int i = c+l; i <= m; i += c) q.push_back(i);
        if(m+1 > c) q.push_back(m+1);
        if(collisions(q)) r = m;
        else l = m+1;
    }
    vector<bool> cek(l+7,1);
    vector<int> a;
    cek[0] = cek[1] = 0;
    for(int i = 2; i*i <= l; i++){
        if(cek[i]){
            a.push_back(i);
            for(int j = i*i; j*j <= l; j+= i) cek[j] = 0;
        }
    }
    int invl = -1;
    while(l != invl){
        invl = l;
        for(auto &p : a){
            if((l/p)*p == l && collisions({1, (l/p)+1})){
                l /= p; break;
            }
        }
    }
    return l;
}

signed hack(){
    return ans(inf/2, inf);
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 17
• Subtask 3: 0 / 75