Submission #492924

#	Time	Username	Problem	Language	Result	Execution time	Memory
492924		White	Bootfall (IZhO17_bootfall)	C++14	13 / 100	1095 ms	32296 KiB

bootfall

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#define endl '\n'
using namespace std;

int n,red[501],bqh[501][250001],s;
vector<int>ans;

void dp(int v,int wrong,int to,int sbor){
    //cout<<endl<<v<<" "<<wrong<<" "<<to<<" "<<sbor<<endl;
    if(sbor>s || v>n || bqh[v][sbor]==to)return ;
    bqh[v][sbor]=to;
    if(v==wrong)dp(v+1,wrong,to,sbor);
    else{
        dp(v+1,wrong,to,sbor);
        dp(v+1,wrong,to,sbor+red[v]);
    }
    return ;
}

int main (){

    //ios_base::sync_with_stdio(false);
    //cin.tie(NULL);

    int sum=0;
    bool krai;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>red[i];
        sum+=red[i];
    }

    for(red[0]=1;red[0]<=sum-red[0];red[0]++){
        sum++;
        krai=false;
        for(int i=0;i<=n && krai==false;i++){
            s=sum-red[i];
            //cout<<s<<i<<endl;
            if(s%2==1 || s<=0)krai=true;
            else{
                dp(0,i,i+1,0);
                if(bqh[n][s/2]!=i+1)krai=true;
            }
        }
        if(krai==false)ans.push_back(red[0]);
        for(int i=0;i<=125001;i++){
            for(int j=0;j<=n;j++){
                bqh[j][i]=0;
            }
        }
    }

    cout<<ans.size()<<endl;
    for(int i=0;i<ans.size();i++)cout<<ans[i]<<" ";
    cout<<endl;

    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:56:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |     for(int i=0;i<ans.size();i++)cout<<ans[i]<<" ";
      |                 ~^~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35