Submission #805852

#	Time	Username	Problem	Language	Result	Execution time	Memory
805852		PixelCat	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	1075 ms	468 KiB

biscuits

#include "biscuits.h"
 
#ifdef NYAOWO
#include "grader.cpp"
#endif
 
#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i <= b; i++)
#define Forr(i, a, b) for(int i = a; i >= b; i--)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sz(x) ((int)x.size())
#define eb emplace_back
#define int LL
using namespace std;
using i32 = int32_t;
using LL = long long;
using pii = pair<int, int>;
 
const int MAXK = 60;
 
int a[MAXK + 10];
vector<pii> trans[MAXK + 10];  // {minimum #tokens, bit}
int sum[MAXK + 10][MAXK + 10];
 
long long count_tastiness(long long x, std::vector<long long> _a) {
    memset(a, 0, sizeof(a));
    int k = sz(_a);
    int sum_all = 0;
    For(i, 0, k - 1) {
        a[i] = _a[i];
        sum_all += (a[i] << i);
    }
    For(b1, 0, k - 1) {
        sum[b1][b1] = a[b1];
        For(b2, b1 + 1, k - 1) sum[b1][b2] = sum[b1][b2 - 1] + (1ll << (b2 - b1));
        For(b2, b1, k - 1) {
            int need = x << (b2 - b1);
            if(need > (1ll << 60)) break;
            trans[b1].eb(max(0ll, need - sum[b1][b2]), b2);
        }
        sort(all(trans[b1]));
    }
    int ans = 0;
    vector<pii> v;
    v.eb(0, 0);
    while(sz(v)) {
        int hibit = v.back().F;
        int cur = v.back().S;
        v.pop_back();
        ans += (((cur + sum[hibit][k - 1]) << hibit) >> k) + 1;
        for(auto &i:trans[hibit]) {
            if(i.F > cur) break;
            v.eb(i.S + 1, (cur + sum[hibit][i.S] - (x << (i.S - hibit))) >> (i.S - hibit + 1));
        }
        // cerr << owo << " " << cur << "\n";
    }
    // cerr << "\n";
    return ans;
}
 

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