Submission #303709

#	Time	Username	Problem	Language	Result	Execution time	Memory
303709		JooDdae	Packing Biscuits (IOI20_biscuits)	C++17	9 / 100	1095 ms	120868 KiB

biscuits

#include<bits/stdc++.h>
#include "biscuits.h"
using namespace std;
using ll = long long;

ll INF = 1e18;

ll count_tastiness(ll x, vector<ll> a) {
	ll ans = 0, sum = 0;
	for(int i=0;i<a.size();i++) sum += (1ll << i) * a[i];

	ll mx = sum / x;
	while((1ll << a.size()) < mx) a.push_back(0);

	queue<ll> qu, qc, ql;
	qu.push(0), qc.push(0), ql.push(0), ans++;
	set<pair<ll, ll>> s;

	while(!qu.empty()){
		ll u = qu.front(), c = qc.front(), l = ql.front() / 2 + a[c]; qu.pop(), qc.pop(), ql.pop();
		if(u + (1ll << c) > mx) continue;
		assert(!s.count({u, c}));
		s.insert({u, c});

		qu.push(u), qc.push(c + 1), ql.push(l);
		if(l >= x) qu.push(u + (1ll << c)), qc.push(c + 1), ql.push(l - x), ans++;
	}

	return ans;
}

Compilation message (stderr)

biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:10:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for(int i=0;i<a.size();i++) sum += (1ll << i) * a[i];
      |              ~^~~~~~~~~

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