Submission #484745

#	Time	Username	Problem	Language	Result	Execution time	Memory
484745		AmirElarbi	Counting Mushrooms (IOI20_mushrooms)	C++14	0 / 100	2 ms	200 KiB

mushrooms

#include "mushrooms.h"
 
#include <bits/stdc++.h>
 
 #define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define fi first
#define se second
#define INF 1e7
#define eps 1e-18
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9+7;
const int nax = 2000005;
int count_mushrooms(int n) {
    int X = 290;
    vi typ[2];
    typ[0].pb(0);
    for(int i = 1; i <= min(n-1,2); i++){
        typ[use_machine({0,i})].pb(i);
    }
    bool B = false;
    if(typ[1].size() == 2)
        B = true;
    for (int i = 3; i <= min(n-2,X); i+=2)
    {
        int res = 0;
        if(B){
            res = use_machine({typ[1][0],i,typ[1][1], i+1});
        }
        else{
            res = use_machine({typ[0][0],i,typ[0][1], i+1});
        }
        if(res == 0){
            typ[B].pb(i);
            typ[B].pb(i+1);
        } else if(res == 1){
            typ[B].pb(i);
            typ[B^1].pb(i+1);
        } else if(res == 2){
            typ[B^1].pb(i);
            typ[B].pb(i+1);
        } else {
            typ[B^1].pb(i);
            typ[B^1].pb(i+1);
        }
    }
    if(n%2 == 0 && n-2 < X && n >= 3){
        typ[use_machine({0,n-1})].pb(n-1);
    }else if(n-2 >= X){
        typ[use_machine({0,291})].pb(291);
    }
    int cnt = typ[0].size();
    for (int i = X; i < n; i+=X)
    {
        vi a;
        for(int j = i; j < i+typ[0].size() && j < n;j++){
            a.pb(typ[0][j-i]);
            a.pb(j);
        }
        int res = use_machine(a);
        cnt += min((int) typ[0].size(),n-i)-((res+1)/2);
        res = 0;
        a.clear();
        for(int j = i+typ[0].size(); j < i+X && j < n;j++){
            a.pb(typ[1][j-i-typ[0].size()]);
            a.pb(j);
        }
        if(a.size())
            res = use_machine(a);
        cnt += ((res+1)/2);
    }
    return cnt;
 
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:68:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         for(int j = i; j < i+typ[0].size() && j < n;j++){
      |                        ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100