Submission #1180392

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180392		Pacybwoah	Packing Biscuits (IOI20_biscuits)	C++20	12 / 100	1096 ms	412 KiB

biscuits

#include "biscuits.h"
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,avx2")
#include<iostream>
#include<vector>
#include<algorithm>
#include<utility>
#include<chrono>
#include<iomanip>
using namespace std;
typedef long long ll;
namespace{
	int ori[20], a[20];
}

long long count_tastiness(ll k, std::vector<long long> vec) {
	auto st = clock();
	ll sum = 0;
	while(!vec.empty() && vec.back() == 0) vec.pop_back();
	int n = (int)vec.size();
	for(int i = 0; i < n; i++) sum += (vec[i] << i);
	if(k == 1){
		ll now = 0, base = 1, ans = 1;
		for(int i = 0; i < n; i++){
			now += vec[i] * base;
			if(now < base * 2){
				ans *= (now / k + 1);
				now = 0;
				base = 1;
			}
			else base *= 2;
		}
		return ans * (now / k + 1);
	}
	for(int i = 0; i < n; i++) ori[i] = vec[i];
	auto f = [&](int now){
		for(int i = 0; i < n; i++) a[i] = ori[i];
		for(int times = 0; times < k; times++){
			int x = now;
			for(int i = n - 1; i >= 0; i--){
				if(x == 0) break;
				if(a[i] < (x >> i)){
					x -= (a[i] << i);
					a[i] = 0;
				}
				else{
					a[i] -= (x >> i);
					x -= ((x >> i) << i);
				}
			}
			if(x != 0) return 0;
		}
		return 1;
	};
	int ans = 0;
	for(int i = 0; i * k <= sum; i++){
		ans += f(i);
		//if(f(i) == 1) cout << i << endl;
		if(float(clock() - st) / CLOCKS_PER_SEC > 0.085) return ans;
	}
	return ans;
}

// g++ -std=c++17 -Wall -Wextra -Wshadow -fsanitize=undefined -fsanitize=address -o run -g biscuits.cpp grader.cpp

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