Submission #240327

#	Time	Username	Problem	Language	Result	Execution time	Memory
240327		Dremix10	Detecting Molecules (IOI16_molecules)	C++17	46 / 100	1092 ms	4228 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
#define F first
#define S second
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define maxp 22
#define EPS (ld)(1e-18)
#define mod (int)(1e9+7)
#define N (int)(1e5+1)

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;

int low[500001];

vector<int> find_subset(int l, int r, vector<int> w) {
    int n=w.size();
    int i,j;

    pair<int,int> arr[n];
    ll sum=0;
    for(i=0;i<n;i++){
        sum+=w[i];
        arr[i]={w[i],i};
    }
    if(sum<l)
        return vector<int>(0);

    sort(arr,arr+n,greater<pair<int,int> >());

    vector<int> s;
    s.push_back(0);
    int k;

    //gp_hash_table<int,int> low;

    low[0]=0;

    for(i=1;i<=n;i++){
        int len=s.size();
        for(k=0;k<len;k++){
            int num=s[k]+arr[i-1].F;
            if(num<l){
                if(low[num]!=0)
                    continue;
                s.push_back(num);
                low[num]=i;
            }
            else if(num<=r){
                vector<int> ans;
                ans.push_back(arr[i-1].S);
                num=s[k];
                int row=i-1;
                //cout<<num<<" "<<row<<endl;
                while(num>0){
                    //cout<<row<<" "<<num<<endl;
                    for(j=row;j>0;j--){
                        if(num<arr[j-1].F)
                            continue;
                        int temp=num-arr[j-1].F;
                        int nr=low[temp];
                        if(temp==0 || nr<j && nr!=0){
                            num-=arr[j-1].F;
                            row=j-1;
                            ans.push_back(arr[j-1].S);
                            break;
                        }
                    }

                }
                return ans;
            }
        }

    }
    return vector<int>(0);


}

/// g++ grader.cpp molecules_full.cpp

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:66:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
                         if(temp==0 || nr<j && nr!=0){
                                       ~~~~~^~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31