Submission #394847

#	Time	Username	Problem	Language	Result	Execution time	Memory
394847		rocks03	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	1093 ms	332 KiB

biscuits

//#pragma GCC target("avx2")
//#pragma GCC optimization("O3")
//#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int)(x).size())
#define all(x) x.begin(), x.end()
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define per(i, a, b) for(int i = (a); i >= (b); i--)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

long long count_tastiness(long long X, vector<long long> a){
    ll ans = 0;
    rep(y, 0, 100000+1){
        ll x = X; int bt = 20;
        while(bt >= 0 && !(y >> bt & 1))
            bt--;
        per(i, SZ(a) - 1, 0){
            if(bt < i){
                continue;
            }
            ll cur = a[i];
            while(true){
                ll sub = min(x, cur / (1ll << (bt - i)));
                x -= sub;
                cur -= sub * (1ll << (bt - i));
                if(x == 0){
                    x = X;
                    --bt;
                    while(bt >= 0 && !(y >> bt & 1))
                        bt--;
                    if(bt < i){
                        break;
                    }
                } else break;
            }
        }
        if(bt < 0){
            ans++;
        }
    }
    return ans;
}

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