Submission #614072

#	Time	Username	Problem	Language	Result	Execution time	Memory
614072		penguinhacker	Packing Biscuits (IOI20_biscuits)	C++17	12 / 100	9 ms	1192 KiB

biscuits

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

#define ll long long
#define ar array

ll count_tastiness(ll x, vector<ll> a) {
	vector<ll> v(60);
	for (int i=0; i<a.size(); ++i)
		v[i]+=(1ll*a[i])<<i;
	for (int i=1; i<60; ++i)
		v[i]+=v[i-1];
	for (int i=0; i<60; ++i)
		v[i]/=x;
	vector<ar<ll, 2>> dp(60);
	for (int i=0; i<60; ++i) {
		dp[i][0]=i?dp[i-1][0]+dp[i-1][1]:1;
		if (v[i]>=(1ll<<i+1)-1)
			dp[i][1]=dp[i][0];
		else if (v[i]>=1ll<<i) {
			dp[i][1]=1;
			for (ll x=v[i]-(1ll<<i); x;) {
				int bit=63-__builtin_clzll(x);
				dp[i][1]+=dp[bit][0];
				x-=1ll<<bit;
			}
			//dp[i][1]=(v[i]==1ll<<i)?1:dp[63-__builtin_clzll(v[i]-(1ll<<i))][1]+dp[63-__builtin_clzll(v[i]-(1ll<<i))][0];
		}
		//if (i<3)
		//	cout << dp[i][0] << " " << dp[i][1] << endl;
	}
	return dp[59][0]+dp[59][1];
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:10:17: 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)
      |                ~^~~~~~~~~
biscuits.cpp:19:20: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   19 |   if (v[i]>=(1ll<<i+1)-1)
      |                   ~^~

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