Submission #795608

#	Time	Username	Problem	Language	Result	Execution time	Memory
795608		alexander707070	Counting Mushrooms (IOI20_mushrooms)	C++14	56.93 / 100	8 ms	340 KiB

mushrooms

#include<bits/stdc++.h>
#include "mushrooms.h"
#define MAXN 20000
using namespace std;

int bucket,res,ans;
int color[MAXN],br[2];
vector<int> s1,s2,curr;

int count_mushrooms(int N){
    bucket=min(int(sqrt(N)*1.414),N);

    for(int i=1;i<bucket;i++){
        color[i]=use_machine({0,i});
    }

    for(int i=0;i<bucket;i++){
        br[color[i]]++;
        if(color[i]==0)s1.push_back(i);
        else s2.push_back(i);
    }

    if(br[0]>=br[1]){
        ans=br[0];

        for(int i=bucket;i<N;i+=br[0]){
            curr.clear();
            for(int f=i;f<min(i+br[0],N);f++){
                curr.push_back(s1[f-i]);
                curr.push_back(f);
            }
            res=use_machine(curr);
            ans+=(min(i+br[0],N)-i)-ceil(res/2.0);
        }
    }else{
        ans=br[0];

        for(int i=bucket;i<N;i+=br[1]){
            curr.clear();
            for(int f=i;f<min(i+br[1],N);f++){
                curr.push_back(s2[f-i]);
                curr.push_back(f);
            }
            res=use_machine(curr);
            ans+=ceil(res/2.0);
        }
    }

    return ans;
}

/*
int main(){

}
*/

• Subtask 1: 56.927 / 100