Submission #240232

#	Time	Username	Problem	Language	Result	Execution time	Memory
240232		Dremix10	Detecting Molecules (IOI16_molecules)	C++17	31 / 100	145 ms	65540 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 endl '\n'
#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)

bool dp[10001][10001];

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



    dp[0][0]=true;
    for(i=1;i<=n;i++)
    for(j=0;j<=10001;j++){
        dp[i][j]|=dp[i-1][j];
        if(j>=arr[i-1])
            dp[i][j]|=dp[i-1][j-arr[i-1]];
    }
    int k;
    for(k=l;k<=r;k++)
    if(dp[n][k]){
        //cout<<n<<" "<<k<<endl;
        vector<int> ans;
        int num=k;
        int row=n;
        while(num>0){

            for(i=row;i>0;i--)
                if(num>=arr[i-1])
            if(dp[i-1][num-arr[i-1]]){
                row=i-1;
                num-=arr[i-1];
                ans.push_back(i-1);
                break;
            }

        }
        return ans;
    }
    return vector<int>(0);
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:27:17: warning: iteration 10001 invokes undefined behavior [-Waggressive-loop-optimizations]
         dp[i][j]|=dp[i-1][j];
         ~~~~~~~~^~~~~~~~~~~~
molecules.cpp:26:14: note: within this loop
     for(j=0;j<=10001;j++){
             ~^~~~~~~

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