Submission #805256

#	Time	Username	Problem	Language	Result	Execution time	Memory
805256		becaido	Packing Biscuits (IOI20_biscuits)	C++17	100 / 100	12 ms	852 KiB

biscuits

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifndef WAIMAI
#include "biscuits.h"
#endif

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

ll count_tastiness(ll x, vector<ll> a) {
    ll ans = 0;
    a.resize(64);
    vector<ll> sum(64), dp(64);
    sum[0] = a[0];
    FOR (i, 1, 63) sum[i] = sum[i - 1] + (a[i] << i);
    /*unordered_map<ll, ll> mp[64];
    auto rec = [&](auto rec, int i, ll cur)->ll {
        if (i < 0) return 1;
        if (mp[i].count(cur)) return mp[i][cur];
        ll tot = 0;
        cur = min(cur, sum[i]);
        tot += rec(rec, i - 1, cur);
        if ((cur >> i) >= x) tot += rec(rec, i - 1, cur - (x << i));
        return mp[i][cur] = tot;
    };
    return rec(rec, 63, sum[63]);*/
    FOR (i, 0, 63) {
        ll cur = sum[i];
        for (int j = i - 1; j >= 0; j--) {
            cur = min(cur, sum[j]);
            if ((cur >> j) >= x) {
                dp[i] += dp[j];
                cur -= x << j;
            }
        }
        dp[i]++;
    }
    return dp[63];
}

/*
in1
2
3 3
5 2 1
3 2
2 1 2
out1
5
6
*/

#ifdef WAIMAI
int main() {
    int q;
    assert(scanf("%d", &q) == 1);
    vector<int> k(q);
    vector<ll> x(q);
    vector<vector<ll>> a(q);
    vector<ll> results(q);
    for (int t = 0; t < q; t++) {
        assert(scanf("%d%lld", &k[t], &x[t]) == 2);
        a[t] = vector<ll>(k[t]);
        for (int i = 0; i < k[t]; i++) {
            assert(scanf("%lld", &a[t][i]) == 1);
        }
    }
    fclose(stdin);

    for (int t = 0; t < q; t++) {
        results[t] = count_tastiness(x[t], a[t]);
    }
    for (int t = 0; t < q; t++) {
        printf("%lld\n", results[t]);
    }
    fclose(stdout);
    return 0;
}
#endif

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:27:8: warning: unused variable 'ans' [-Wunused-variable]
   27 |     ll ans = 0;
      |        ^~~

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