Submission #975005

#	Time	Username	Problem	Language	Result	Execution time	Memory
975005		LucaIlie	Packing Biscuits (IOI20_biscuits)	C++17	42 / 100	1022 ms	74972 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>
 
using namespace std;
 
long long count_tastiness( long long x, vector <long long> a ) {
    const int k = 120;
    long long s, m;
    unordered_map <long, long long> dp[k];
 
    a.resize( k );
 
    s = 0;
    for ( int b = 0; b < k; b++ ) {
        a[b] += s;
        if ( a[b] > x ) {
            s = a[b] - x;
            a[b] = x + s % 2;
            s /= 2;
        } else
            s = 0;
    }
 
    dp[0][a[0]] = 1;
    if ( a[0] - x >= 0 )
        dp[0][a[0] - x] = 1;
    for ( int b = 1; b < k; b++ ) {
        for ( auto p: dp[b - 1] ) {
            s = p.first;
            m = p.second;
            dp[b][s / 2 + a[b]] += m;
            if ( s / 2 + a[b] - x >= 0 )
                dp[b][s / 2 + a[b] - x] += m;
        }
    }
 
    m = 0;
    for ( auto p: dp[k - 1] )
        m += p.second;
 
    return m;
}

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 21 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23