Submission #1070966

#	Time	Username	Problem	Language	Result	Execution time	Memory
1070966		mariaclara	Packing Biscuits (IOI20_biscuits)	C++17	9 / 100	1133 ms	1878328 KiB

biscuits

#include "biscuits.h"
#include<bits/stdc++.h>
#pragma GCC optimize("O3, fast-math")
using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mk make_pair
#define pb push_back
#define fr first
#define sc second

ll count_tastiness(ll x, vector<ll> a) {
	int n = 60;
	while(sz(a) < 60) a.pb(0);

	for(int i = 0; i < n-1; i++) {
		if(a[i] < x) continue;
		a[i+1] += (a[i] - x)/2;
		a[i] = x + ((a[i] - x)%2);
	}
	a[n-1] = min(a[n-1], x);

	vector<ll> dp;

	dp.pb(0);
	ll to_add = 0;
	for(int i = 0; i < n; i++) {
		// (val + to_add)/2^i >= x
		// val >= (x << i) - to_add
		to_add += (a[i] << i);
		ll aux = (x<<i), val = to_add - aux;

		if((x << i) > 1e18) break;

		int m = sz(dp);
		for(int j = 0; j < m and dp[j] <= val; j++) {
			// dp[i][j] = guarda quantos números eu posso formar
			dp.pb(aux + dp[j]);
		}
	}

	return sz(dp);
}

Compilation message (stderr)

biscuits.cpp:3:37: warning: bad option '-f fast-math' to pragma 'optimize' [-Wpragmas]
    3 | #pragma GCC optimize("O3, fast-math")
      |                                     ^
biscuits.cpp:15:38: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   15 | ll count_tastiness(ll x, vector<ll> a) {
      |                                      ^

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