Submission #142576

#	Time	Username	Problem	Language	Result	Execution time	Memory
142576		andreiomd	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	480 ms	37708 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"

using namespace std;

const int NMAX = 2e5 + 5;

int N, A[NMAX], B[NMAX];

long long dp[NMAX];

map < int, vector < int > > mp;

map < int, int > H;

static long long Sum (int Left, int Right)
{
    if(Left > Right)
        return 0LL;

    return dp[Right] - dp[Left - 1];
}

vector < int > find_subset (int l, int u, vector < int > w)
{
    int N = (int)w.size();

    for(int i = 0; i < N; ++i)
    {
        A[i + 1] = w[i];

        mp[A[i + 1]].push_back(i);
        H[A[i + 1]] = 0;
    }

    sort(A + 1, A + N + 1);

    for(int i = 1; i <= N; ++i)
        dp[i] = dp[i - 1] + 1LL * A[i];

    bool Ok = false;

    int Left = 1, Right = 0;

    for(Left = 1, Right = 0; Left <= N && Right <= N; ++Left)
    {
        while(Sum(Left, Right) < l && Left <= N && Right <= N)
            ++Right;

        if(Sum(Left, Right) >= l && Sum(Left, Right) <= u)
        {
            Ok = true;

            break;
        }

        while(Sum(Left, Right) > u && Left <= N && Right <= N)
            ++Left;

        if(Sum(Left, Right) >= l && Sum(Left, Right) <= u)
        {
            Ok = true;

            break;
        }
    }

    vector < int > Sol;

    if(Ok)
    {
        for(int i = Left; i <= Right; ++i)
        {
            Sol.push_back(mp[A[i]][H[A[i]]]);

            ++H[A[i]];
        }
    }

    return Sol;
}

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