Submission #412393

#	Time	Username	Problem	Language	Result	Execution time	Memory
412393		achibasadzishvili	Packing Biscuits (IOI20_biscuits)	C++14	100 / 100	90 ms	1332 KiB

biscuits

#include "biscuits.h"
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll pre[505],n;
map<ll,ll>got;
ll solve(ll k){
	if(k == 1)return 1;
	if(k <= 0)return 0;
	if(got.count(k))return got[k];
	ll ret = 0;
	ll pw = 1,t = 0;
	while(2 * pw < k){
		t++;
		pw *= 2;
	}
	got[k] = solve(pw) + solve(min(k ,1 + pre[t] / n) - pw);
	return got[k];
}
ll count_tastiness(ll x, vector<ll> a){
	got.clear();
	for(int i=0; i<=200; i++)
		pre[i] = 0;
	for(int i=0; i<a.size(); i++){
		if(!i)pre[i] = a[i] * (1LL << i);
		else pre[i] = pre[i - 1] + a[i] * (1LL << i);
	}
	for(int i=a.size(); i<=200; i++)
		pre[i] = pre[i - 1];
	n = x;
	return solve(pre[(int)a.size() - 1] + 1);
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int solve(long long int)':
biscuits.cpp:14:5: warning: unused variable 'ret' [-Wunused-variable]
   14 |  ll ret = 0;
      |     ^~~
biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:27:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for(int i=0; i<a.size(); i++){
      |               ~^~~~~~~~~

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