Submission #1073809

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073809		allin27x	Packing Biscuits (IOI20_biscuits)	C++17	0 / 100	3 ms	348 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) {
	int ans = 0;
	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();
	vector dp(n, vector<int> {0,0}); dp[n-1][0]=1; dp[n-1][1] = 2;
	for (int i=n-2; i>=0; i--) {
		if (!a[i]) {
			dp[i][0] = dp[i+1][0];
			dp[i][1] = 2*dp[i][0];
		}
		if (a[i]==1) {
			dp[i][0] = 2*dp[i+1][0];
			dp[i][1] = 2*dp[i+1][0] + dp[i+1][1];
		}

		if (a[i]==2) {
			dp[i][0] = 2*dp[i+1][0] + dp[i+1][1];
			dp[i][1] = 2*dp[i+1][0] + 2*dp[i+1][1];
		}
	}
	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:10:17: 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]
   10 |  for (int i=0; i<a.size(); i++) {
      |                ~^~~~~~~~~
biscuits.cpp:7:6: warning: unused variable 'ans' [-Wunused-variable]
    7 |  int ans = 0;
      |      ^~~

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