Submission #418734

#	Time	Username	Problem	Language	Result	Execution time	Memory
418734		2qbingxuan	Packing Biscuits (IOI20_biscuits)	C++14	21 / 100	1087 ms	50848 KiB

biscuits

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

const int maxn = 65;
map<long long, long long> dp[maxn];
long long dfs(vector<long long> &a, long long x, int i, long long carry) {
    if (i == a.size()) {
        return carry / x + 1;
    }
    if (dp[i].count(carry))
        return dp[i][carry];
    long long &res = dp[i][carry];
    carry += a[i];
    res += dfs(a, x, i+1, carry / 2); // y >> i & 1 == 0
    if (carry >= x) {
        res += dfs(a, x, i+1, (carry - x) / 2);
    }
    return res;
}
long long count_tastiness(long long x, std::vector<long long> a) {
    for (int i = 0; i < a.size(); i++) dp[i].clear();
    return dfs(a, x, 0, 0);
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int dfs(std::vector<long long int>&, long long int, int, long long int)':
biscuits.cpp:8:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     if (i == a.size()) {
      |         ~~^~~~~~~~~~~
biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0; i < a.size(); i++) dp[i].clear();
      |                     ~~^~~~~~~~~~

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