Submission #827602

#	Time	Username	Problem	Language	Result	Execution time	Memory
827602		GrindMachine	죄수들의 도전 (IOI22_prison)	C++17	47 / 100	14 ms	1420 KiB

prison

// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define conts continue
#define sz(a) a.size()

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &x, T y){
  x = min(x,y);
}

template<typename T>
void amax(T &x, T y){
  x = max(x,y);
}

#define debug(x) cout << #x << " = "; cout << x; cout << endl

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = 1e9 + 5;
const ll inf2 = (ll)1e18 + 5;

#include "prison.h"

int pos_bit(int x, int b, int p){
    rep(i,p){
        x /= b;
    }
    return x%b;
}

std::vector<std::vector<int>> devise_strategy(int n) {
    int base = 4;
    int LOG = 0;
    while(pow(base,LOG+1) <= n) LOG++;
    LOG++;

    vector<vector<int>> a(LOG*(base+1)-2,vector<int>(n+1));
    int curr_bit = LOG;

    rep(i,sz(a)){
        if(i%(base+1) == 0){
            curr_bit--;
        }

        if(i%(base+1) == 0){
            a[i][0] = 0;
            rep1(j,n){
                int b = pos_bit(j,base,curr_bit);
                if(curr_bit > 0){
                    a[i][j] = i+1+b;
                }
                else{
                    if(b == 0){
                        a[i][j] = -1;
                    }
                    else if(b == base-1){
                        a[i][j] = -2;
                    }
                    else{
                        a[i][j] = i+b;
                    }
                }
            }
        }
        else{
            a[i][0] = 1;
            int b1 = (i%(base+1))-1;
            if(curr_bit == 0){
                b1++;
            }

            int nxt = (i/(base+1)+1)*(base+1);

            rep1(j,n){
                int b2 = pos_bit(j,base,curr_bit);
                if(b1 < b2){
                    a[i][j] = -1;
                }
                else if(b2 < b1){
                    a[i][j] = -2;
                }
                else{
                    a[i][j] = min((int)sz(a)-1,nxt);
                }
            }
        }
    }

    // rep(i,sz(a)){
    //     rep(j,n+1){
    //         cout << a[i][j] << " ";
    //     }
    //     cout << endl;
    // }

    return a;
}

Compilation message (stderr)

prison.cpp: In function 'std::vector<std::vector<int> > devise_strategy(int)':
prison.cpp:26:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 | #define rep(i,n) for(int i = 0; i < n; ++i)
      |                                   ^
prison.cpp:66:5: note: in expansion of macro 'rep'
   66 |     rep(i,sz(a)){
      |     ^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 37 / 90