Submission #802197

#	Time	Username	Problem	Language	Result	Execution time	Memory
802197		lollipop	Counting Mushrooms (IOI20_mushrooms)	C++17	0 / 100	0 ms	208 KiB

mushrooms

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define ll long long
#define pb push_back
#define s second
#define f first
#define pf push_front
#define inf 100000000000000000
#define bitebi __builtin_popcountll
#define FOR( i , n ) for( int i = 0 ; i < n ; i ++ )
#define YES cout <<"YES\n"
#define NO cout << "NO\n"
#define debug cout << "Here Fine" << endl ;
#define pr pair < int , int >
#define fbo find_by_order // returns iterator
#define ook order_of_key // returns strictly less numbers than key
using namespace std ;
//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,fma")
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const double Pi=acos(-1.0);
const double EPS=1E-8;
const int mod =  1000000007 ;
const int mod1 = 998244353 ;
const int NN = 2e5 + 10 ;
//mt19937 R(time(0));
int myrandom (int i) { return std::rand()%i;}
map < int , int > ma , ma1 ;

#include "mushrooms.h"

// int use_machine(std::vector<int> x){

// }


int count_mushrooms(int n){
    vector < int > a , A , b , B ;
    a.pb( 0 ) ;
    for( int j = 1 ; j < n ; j ++ ){
      if( a.size() >= -1 ){
        int lf = ( n - j ) ;
        int jj = j ;
        int ss = a.size() ;
        int mn = min( ss , lf ) ;
        vector < int > v ;
        int nw = 0 ;
        FOR( i , 1 ){
          v.pb( a[ i ] ) ;
          v.pb( jj ) ; jj ++ ;
          nw ++ ;
        }
        int x = use_machine( v ) ;
        // if( x % 2 == 1 ){
        //    b.pb( jj - 1 ) ; 
        // } else a.pb( jj - 1 )  ;
         int cc = 0 ;
         while( x > 0 ){
          cc ++ ; x-= 2 ;
         }
         cc = nw - cc ;
     //    if( x % 2 == 0 ) cc -- ;
         while( cc -- ) A.pb( 1 ) ;
         j = jj - 1 ;
      }
      else{
        int lf = ( n - j ) ;
        int jj = j ;
        int mn = min( ( int ) (b.size()) , lf ) ;
        vector < int > v ;
        FOR( i , mn ){
          v.pb( b[ i ] ) ;
          v.pb( jj ) ; jj ++ ;
        }
        int x = use_machine( v ) ;
        if( x % 2 == 1 ){
           a.pb( jj - 1 ) ; 
        } else b.pb( jj - 1 ) ;
         while( x > 0 ){
          A.pb( 1 ) ;
           x-= 2 ;
         }
         if( x % 2 == 1 ) A.pop_back();
        j = jj - 1 ;
      }
    }
    return a.size() + A.size() ;
}

//int use_machine(std::vector<int> x)

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:45:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   45 |       if( a.size() >= -1 ){
      |           ~~~~~~~~~^~~~~
mushrooms.cpp:49:13: warning: unused variable 'mn' [-Wunused-variable]
   49 |         int mn = min( ss , lf ) ;
      |             ^~

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