Submission #724913

#	Time	Username	Problem	Language	Result	Execution time	Memory
724913		MohamedAliSaidane	Packing Biscuits (IOI20_biscuits)	C++14	42 / 100	1069 ms	43432 KiB

biscuits

#include<bits/stdc++.h>
#include "biscuits.h"
#include<ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int,int> pii;
typedef vector<pii> vpi;

#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(),(x).end()

const ll MOD = 1e9 + 7, INF = 1e18;
ll mod(ll x, ll m = MOD) {return (x + m) % m;}

int n;
ll x, tot = 0ll;
vll A;
bool check(ll s)
{
    vll B = A;
    for(int i =0; i < x; i++)
    {
        ll cur = s;
        for(int j = n - 1; j >= 0; j--)
        {
            ll q = min(B[j], cur/(1 << j));
            cur -= q * (1 << j);
            B[j] -= q;
        }
        if(cur > 0)
            return false;
    }
    return true;
}
ll sub1()
{
    int ans = 0;
    for(int i =0; i <= tot/x; i++)
    {
        if(i == 0 || check(i))
            ans++;
    }
    return ans;
}
unordered_map<ll,ll> dp[61];

ll f(int i, ll sum)
{
    if(i == 60)
        return 1ll;
    if(dp[i].find(sum) != dp[i].end())
        return dp[i][sum];
    if(sum >= x)
        return dp[i][sum] = f(i + 1, sum/2ll + A[i + 1]) + f(i + 1, (sum - x)/2ll + A[i + 1]);
    else
        return dp[i][sum] = f(i + 1, sum/2ll + A[i + 1]);
}
ll count_tastiness(ll X, vll a)
{
    x = X;
    A = a;
    n = (int)(a.size());
    while(n < 60)
    {
        A.pb(0ll);
        n++;
    }
    for(int i =0 ; i < n; i++)
        dp[i].clear();
    return f(0, a[0]);


}
/*
int32_t main()
{
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cout << count_tastiness(1, {2, 1, 2});
}
*/

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