Submission #773358

#	Time	Username	Problem	Language	Result	Execution time	Memory
773358		Magikarp4000	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	12 ms	1160 KiB

prison

#include "prison.h"
#include <bits/stdc++.h>
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int(1e9+7)
#define ln '\n' 
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;
 
const int MAXM = 24, LOG = 12;
 
std::vector<std::vector<int>> devise_strategy(int n) {
    vector<vector<int>> v(MAXM+1,vector<int>(n+1,0));
    FOR(j,1,n+1) {
        v[0][j] = (j&(1<<(LOG))) ? 1 : 2;
    }
    for (int i = 1; i < MAXM+1; i += 1) {
        int t = ((i+1)/2)%2, pos = LOG-((i-1)/2), val = i%2;
        v[i][0] = t;
        FOR(j,1,n+1) {
            int cur = j&(1<<pos);
            if (cur && !val) v[i][j] = t ? -1 : -2;
            else if (!cur && val) v[i][j] = t ? -2 : -1;
            else if (pos-1 == 0) v[i][j] = j&1 ? -2 : -1;
            else v[i][j] = j&(1<<(pos-1)) ? min(MAXM,(i+1)/2*2+1) : min(MAXM,(i+1)/2*2+2);
        }
    }
    return v;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 55 / 90