Submission #421076

#	Time	Username	Problem	Language	Result	Execution time	Memory
421076		REALITYNB	Packing Biscuits (IOI20_biscuits)	C++17	21 / 100	1087 ms	332 KiB

biscuits

#include <bits/stdc++.h> 
#include "biscuits.h"
#define int long long 
using namespace std; 
int sub1(int k , vector<int> a){
    int ans = 0 ; 
    int n = 60 ; 
    while(a.size()!=n+1) a.push_back(0) ; 
    for(int target=0;target<=100000;target++){
        vector<int>b=a; 
        bool flg =1 ; 
        for(int i=0;i<n;i++){
            if((1LL<<i)&target){
                if(b[i]<k){
                    flg=0 ; 
                    break ; 
                }
                b[i]-=k; 
                b[i+1]+=b[i]/2 ; 
            }
            else b[i+1]+=b[i]/2 ; 
        }
        ans+=flg; 
    }
    return ans  ; 
} 
int count_tastiness(int k,vector<int> a){
    if(k!=1)
        return sub1(k,a) ; 
 
    int n =120 ; 
    while(n!=a.size()) a.push_back(0) ; 
    vector<int> dp(n+1); 
    dp[n]=1; 
    for(int i=n-1;i>-1;i--){
        int sum = 0 ; 
        vector<int> b=a; 
        int stop = i+1; 
        for(int j=i;j<n;j++){
            if(b[j]>k){
                b[j+1]+=b[j]/2; 
                if(b[j]&1) b[j]=1; 
                else b[j]=0; 
                stop=j+2; 
            }
            else break ; 
        }
        if(a[i]==0) {
            dp[i]+=dp[i+1] ; 
            continue ; 
        }
        vector<int> in ; 
        for(int j=i;j<stop;j++) if(b[j]) in.push_back(j) ; 
        for(int j=1;j<in.size();j++)
            dp[i]+=dp[stop]*(1LL<<(in[j-1]-i)); 
        dp[i]+=dp[stop]; 
        dp[i]+=dp[stop]*(1LL<<(in.back()-i)) ; 
    }
    return dp[0] ; 
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int sub1(long long int, std::vector<long long int>)':
biscuits.cpp:8:19: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
    8 |     while(a.size()!=n+1) a.push_back(0) ;
      |           ~~~~~~~~^~~~~
biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:32:12: 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]
   32 |     while(n!=a.size()) a.push_back(0) ;
      |           ~^~~~~~~~~~
biscuits.cpp:54:22: 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]
   54 |         for(int j=1;j<in.size();j++)
      |                     ~^~~~~~~~~~
biscuits.cpp:36:13: warning: unused variable 'sum' [-Wunused-variable]
   36 |         int sum = 0 ;
      |             ^~~

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