Submission #436178

#	Time	Username	Problem	Language	Result	Execution time	Memory
436178		HediChehaidar	Library (JOI18_library)	C++17	19 / 100	415 ms	356 KiB

library

/*
ID: hedichehaidar
TASK: photo
LANG: C++11
*/
#include<bits/stdc++.h>
#include "library.h"
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define dte  tuple<double , double , double>
using namespace std;
const int INF = 1000*1000*1000; // 1 e 9
const int MOD = INF + 7;
const double EPS = 0.000000001; // 1 e -9
const ll inf = (ll)1e18;

int n;
bool seen[1010];
/*int Query(vi v){
    for(auto c : v) cout << c << " "; cout << endl;
    int x; cin>>x; return x;
}
void Answer(vi v){
    for(auto c : v) cout << c << " "; cout << endl;
}*/
void Solve(int N){
    n = N;
    vi ask(n , 0);
    vi ans;
    deque<int> dq;
    dq.pb(1);
    ask[0] = 1;
    seen[1] = true;
    while(dq.size() < n){
        for(int i = 1 ; i <= n ; i++){
            if(!seen[i]){
                ask[i - 1] = 1;
                if(Query(ask) == 1){
                    if(dq.size() == 1) dq.pb(i);
                    else{
                        vi v(n , 0);
                        v[dq.front() - 1] = 1;
                        v[i - 1] = 1;
                        if(Query(v) == 1) dq.push_front(i);
                        else dq.pb(i);
                    }
                    seen[i] = true;
                    break;
                }
                ask[i - 1] = 0;
            }
        }
    }
    for(auto c : dq){
        ans.pb(c);
    }
    Answer(ans);
}
/*int main(){
    //ifstream fin ("race.in");
    //ofstream fout ("race.out");
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int N; cin>>N;
    Solve(N);
    return 0;
}*/

/*
    Think of : BS / DFS / BFS / SSSP / SCC / MSP / MAX FLOW / TOPSORT / LCA / MATRIX / DP(bitmask) / 2 POINTERS / SEG TREE / MATH / UN FIND / MO
    Read the statement CAREFULLY !!
    Make a GREADY APPROACH !!!! (start from highest / lowest)
    Make your own TESTS !!
    Be careful from CORNER CASES !
*/

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:50:21: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |     while(dq.size() < n){
      |           ~~~~~~~~~~^~~

• Subtask 1: 19 / 19
• Subtask 2: 0 / 81