Submission #1075144

#	Time	Username	Problem	Language	Result	Execution time	Memory
1075144		allin27x	Packing Biscuits (IOI20_biscuits)	C++17	12 / 100	1002 ms	2097152 KiB

biscuits

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

long long count_tastiness(long long x, std::vector<long long> a) {
	a.resize(a.size()+65, 0);
	int extra = 0;
	for (int i=0; i<a.size(); i++) {
		extra/=2; a[i] += extra;
		if (a[i]&1) {
			extra = a[i] - 1; a[i] = 1;
		} else {
			if (!a[i]) continue;
			extra = a[i] - 2; a[i] = 2;
		}
	}
	int n = a.size();
	int UB = 3*x+5;
	vector dp(n, vector<int> (UB, 0));
	for (int i=0; i<UB; i++) dp[n-1][i] = i+1;
	for (int i=n-2; i>=0; i--) {
		for (int inc =0; inc<UB; inc++) {
			if (inc + a[i] < x) {
				dp[i][inc] = dp[i+1][(inc+a[i])/2];
			} else {
				dp[i][inc] = dp[i+1][(inc+a[i])/2] + dp[i+1][(inc+a[i]-x)/2];
			}
		}
	}
	return dp[0][0];
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:9:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |  for (int i=0; i<a.size(); i++) {
      |                ~^~~~~~~~~

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