Submission #334499

#	Time	Username	Problem	Language	Result	Execution time	Memory
334499		giorgikob	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	20 ms	1252 KiB

biscuits

#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;

#include "biscuits.h"

const int K = 61;

long long count_tastiness(long long x, std::vector<long long> a) {

    vector<ll>dp(K,0);
    dp[0] = 1;
    ll sum = a[0];
    while(a.size() < K) a.pb(0);
    for(ll i = 1; i < K; i++){
        if(((1LL<<i)-1) > 1e18/x) {
            dp[i] = dp[i-1];
            continue;
        }
        ll b = ((1LL<<i)-1)*x;
        //cout << b << endl;
        ll y = 0;
        bool ok = false;
        for(ll j = i-1; j >= 0; j--){
            y += min(a[j],(b-y)/(1LL<<j))*(1LL<<j);
            if(y > 1e18){
                ok = true;
                dp[i] = dp[i-1];
                break;
            }
        }

        if(ok) continue;

        //cout << y << endl;
        int k = i-1;
        while(y >= 0 && k >= 0){
            dp[i] += dp[k];
            y -= x*(1LL<<k);
            if(y < x && y >= 0){
                dp[i]++;
                break;
            }
            while((1LL<<k)*x > y) k--;
        }
        //if(i < a.size())sum += a[i]*p;
    }
    return dp[K-1];
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:16:8: warning: unused variable 'sum' [-Wunused-variable]
   16 |     ll sum = a[0];
      |        ^~~

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