Submission #789971

#	Time	Username	Problem	Language	Result	Execution time	Memory
789971		ono_de206	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	10 ms	1236 KiB

prison

#include "prison.h"

#include<bits/stdc++.h>
using namespace std;

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

//#define int long long
 
typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

vector<vector<int>> devise_strategy(int n) {
	vector<vector<int>> ret;
	ret.pb(vector<int>{0});
	for(int i = 1; i <= n; i++) {
		if(i & (1 << 12)) ret[0].pb(2);
		else ret[0].pb(1);
	}
	int bit = 12, now = 1;
	// 0 = A 1 = B
	while(bit > 0) {
		ret.pb(vector<int>{now});
		for(int i = 1; i <= n; i++) {
			if((i >> bit) & 1) ret.back().pb(now ? -1 : -2);
			else {
				if((i >> (bit - 1)) & 1) {
					if(bit == 1) ret.back().pb(now ? -1 : -2);
					else ret.back().pb(ret.size() + 2);
				} else {
					if(bit == 1) ret.back().pb(now ? -2 : -1);
					else ret.back().pb(ret.size() + 1);
				}
			}
		}
		ret.pb(vector<int>{now});
		for(int i = 1; i <= n; i++) {
			if(!((i >> bit) & 1)) ret.back().pb(now ? -2 : -1);
			else {
				if((i >> (bit - 1)) & 1) {
					if(bit == 1) ret.back().pb(now ? -1 : -2);
					else ret.back().pb(ret.size() + 1);
				} else {
					if(bit == 1) ret.back().pb(now ? -2 : -1);
					else ret.back().pb(ret.size());
				}
			}
		}
		bit--;
		now ^= 1;
	}
	return ret;
}

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