Submission #407203

#	Time	Username	Problem	Language	Result	Execution time	Memory
407203		AmineTrabelsi	Counting Mushrooms (IOI20_mushrooms)	C++14	25 / 100	93 ms	304 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
int count_mushrooms(int n) {
    int ans = 1;
    vector<int> a;
    int ind = 1;
    for(int i=1;i+99<n;i+=100){
        vector<int> m;
        for(int j=0;j<100;j++){
            m.push_back(i+j);
        }
        int cnt = use_machine(m);
        if(cnt == 0){
            vector<int> t;
            t.push_back(0);
            for(int j=0;j<(int)m.size();j++){
                t.push_back(m[j]);
            }
            int n_cnt = use_machine(t);
            if(n_cnt == 0){
                ans += 100;
                for(auto j:m)a.push_back(i+j);
            }
        }else{
            for(int j=0;j<(int)m.size();j++){
                if(use_machine({0,m[j]}) == 0){
                    a.push_back(m[j]);
                    ans++;
                }
            }
        }
        ind = i+100;
        if(a.size() >= 2)break;
    }
    /*
    for(auto i:a)cerr<<i<<" ";
        cerr<<'\n';
    */
    if(a.size() >= 2){
        for(int i=ind;i+2<n;i+=3){
            vector<int> m = {0,i,a[0],i+1,a[1],i+2};
            int cnt = use_machine(m);
            if(cnt == 0){
                ans += 3;
            }else if(cnt == 1 || cnt == 2){
                ans += 2;
            }else if(cnt == 3 || cnt == 4){
                ans += 1;
            }
            ind = i+3;
        }

    }
    while(ind < n){
        ans += use_machine({0,ind++}) == 0;
    }
    return ans;
}
/*
21
0 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
*/

• Subtask 1: 25 / 100