Submission #308375

#	Time	Username	Problem	Language	Result	Execution time	Memory
308375		4fecta	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	1077 ms	77644 KiB

biscuits

#pragma GCC optimize("O3")
#pragma GCC target("sse4")

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

using namespace std;
using namespace __gnu_pbds;

typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

#define ll long long
#define int ll
#define ld long double
#define pii pair<int, int>
#define f first
#define s second
#define readl(_s) getline(cin, (_s));
#define boost() cin.tie(0); cin.sync_with_stdio(0)

const int MN = 65;

int k, psa[MN];

int count_tastiness(int x, vector<int> a) {
    k = a.size();
    psa[0] = a[0];
    for (int i = 1; i < k; i++) {
        psa[i] = a[i] * (1ll << i) + psa[i - 1];
        //printf("%d\n", psa[i]);
    }
    for (int i = k; i < 60; i++) psa[i] = psa[i - 1];
    vector<int> ans;
    ans.push_back(0);
    //if (psa[0] >= x) ans.insert(1);
    /*for (int i = 0; i < 63; i++) {
        vector<int> tmp;
        for (int val : ans) {
            int y = val + (1ll << i);
            //printf("%lld\n", y);
            if (psa[i] / x >= y) tmp.push_back(y);
        }
        for (int p : tmp) ans.push_back(p);
    }*/
    queue<int> q;
    q.push(0);
    set<int> vis;
    vis.insert(0);
    while (q.size()) {
        int cur = q.front(); q.pop();
        for (int i = 0; i < 60; i++) {
            int y = cur + (1ll << i);
            if (vis.count(y)) continue;
            //printf("%lld\n", y);
            if (psa[i] / x >= y) ans.push_back(y), q.push(y), vis.insert(y);
        }
    }
    /*for (int i = 1; i <= 1000000; i++) {
        int b = 0;
        for (int s = 0; s < 30; s++) if (i & (1 << s)) b = s;
        if (psa[b] >= x * i && ans.count(i - (1 << b))) ans.insert(i);
    }*/
    return (ll) ans.size();
}

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