Submission #1017758

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017758		n3rm1n	Holiday (IOI14_holiday)	C++17	23 / 100	62 ms	65536 KiB

holiday

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

using namespace std;
int maxatr = 0, cnt[105];
const int MAXN = 3003, MAXD = 9006;
long long dp_left[MAXN][MAXD], dp_right[MAXN][MAXD];
long long total_left[MAXD], total_end_left[MAXN];
long long total_right[MAXD], total_end_right[MAXN];
long long int findMaxAttraction(int n, int start, int d, int attraction[])
{
    for(int i = 0; i < n; ++ i)
        maxatr = max(maxatr, attraction[i]);
    if(start == 0 && maxatr <= 100)
    {
        long long sum = 0;
        for (int i = 0; i < n; ++ i)
        {
            cnt[attraction[i]] ++;
            int freeto = d - i;
            long long curr = 0;
            for (int j = 100; j >= 0 && freeto; -- j)
            {
                curr += min(freeto, cnt[j]) * j;
                long long taken = min(freeto, cnt[j]);
                freeto -= taken;
            }
            sum = max(sum, curr);
        }
        return sum;
    }
    for (int i = start; i >= 0; -- i)
    {
        for (int w = 0; w <= d; ++ w) /// samo za gledane
        {
            if(w != 0)dp_left[i][w] = max(dp_left[i][w], dp_left[i][w-1]);
            dp_left[i][w] = max(dp_left[i][w], dp_left[i+1][w]); /// ne gledame
            if(w != 0)dp_left[i][w] = max(dp_left[i][w], dp_left[i+1][w-1] + attraction[i]);
           // cout << i << " " << w << " " << dp_left[i][w] << endl;
        }
    }
    for (int i = 0; i <= start; ++ i)
    {
        for (int w = 0; w <= d; ++ w)
        {
            total_left[w + (start - i) * 2] = max(total_left[w + (start - i) * 2], dp_left[i][w]);
            total_end_left[w + (start - i)] = max(total_end_left[w + (start - i)], dp_left[i][w]);
        }
    }
    for (int i = start+1; i < n; ++ i)
    {
        for (int w = 0; w <= d; ++ w) /// samo za gledane
        {
            if(w != 0)dp_right[i][w] = max(dp_right[i][w], dp_right[i][w-1]);
            dp_right[i][w] = max(dp_right[i][w], dp_right[i-1][w]); /// ne gledame
            if(w != 0)dp_right[i][w] = max(dp_right[i][w], dp_right[i-1][w-1] + attraction[i]);
        }
    }
    for (int i = start+1; i < n; ++ i)
    {
        for (int w = 0; w <= d; ++ w)
        {
            total_right[w + (i - start) * 2] = max(total_right[w + (i - start) * 2], dp_right[i][w]);
            total_end_right[w + (i - start)] = max(total_end_left[w + (i - start)], dp_right[i][w]);
        }
    }
    long long ans = 0;
    for (int fix_left = 0; fix_left <= d; ++ fix_left)
    {
        ans = max(ans, total_end_left[fix_left] + total_right[d - fix_left]);
        ans = max(ans, total_end_right[d - fix_left] + total_left[fix_left]);

    }
    return ans;
}
/*const int MAXN = 21, MAXMASK = (1 << 21) + 10;
int dp[MAXN][MAXMASK];
long long sum[MAXMASK];
long long int findMaxAttraction(int n, int start, int d, int attraction[])
{
    //cout << MAXN << " " << MAXMASK << endl;
    int inf = 1e9;
    for (int i = 0; i < n; ++ i)
    {
        for (int mask = 0; mask <= (1 << (n-1)); ++ mask)
        {
            dp[i][mask] = inf;
        }
    }
    for (int mask = 0; mask <= (1 << (n-1)); ++ mask)
    {
        for (int v = 0; v < n; ++ v)
        {
            if(((1 << v) & mask))sum[mask] += 1LL * attraction[v];
        }
    }
    dp[start][0] = 0;
    long long ans = 0;
    for (int mask = 0; mask <= (1 << (n-1)); ++ mask)
    {
        for (int v = 0; v < n; ++ v)
        {
            if(dp[v][mask] == inf)continue;
            for (int add = 0; add < n; ++ add)
                if(!(mask & (1 << add)))dp[add][(mask | (1 << add))] = min(dp[add][(mask | (1 << add))], dp[v][mask] + abs(v - add) + 1);
            if(dp[v][mask] <= d)ans = max(ans, sum[mask]);
        }
    }
    return ans;
}*/

• Subtask 1: 0 / 7
• Subtask 2: 23 / 23
• Subtask 3: 0 / 17
• Subtask 4: 0 / 53