Submission #400773

#	Time	Username	Problem	Language	Result	Execution time	Memory
400773		REALITYNB	Packing Biscuits (IOI20_biscuits)	C++14	9 / 100	1081 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]>1){
                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]*(1<<(in.back()-i)) ; 
    }
    return dp[0] ; 
}
#define ll long long 
long long ccount_tastiness(long long x, std::vector<long long> a) {
    a.resize(128, 0);
    //cerr << "a: "; for (int i=0; i<a.size(); ++i) cerr << a[i] << ' '; cerr << endl;
    int add = 0;
    for (int i=0; i<a.size(); ++i) {
        a[i] += add;
        add = max(0LL, (a[i] - x) >> 1);
        a[i] -= add << 1;
    }
 
    ll ans = 0;
    for (int y=0; y<=100000; ++y) {
        ll carry = 0;
        bool ok = true;
        for (int i=0; i<62; ++i) {
            ll cur = a[i] + carry;
            if (y & (1LL << i)) {
                if (cur < x) {
                    ok = false;
                    break;
                }
                cur -= x;
            }
            carry = cur >> 1;
        }
        if (ok) {
            ++ans;
            //cerr << "y: " << y << '\n';
        }
    }
    
    return ans;
}
/*int main(){
    cout << count_tastiness(1,{3,1,2,1,0,1}) << " "<< ccount_tastiness(1,{3,1,2,1,0,1}) << endl ; 
}*/

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 ;
      |             ^~~
biscuits.cpp: In function 'long long int ccount_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:66:20: 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]
   66 |     for (int i=0; i<a.size(); ++i) {
      |                   ~^~~~~~~~~

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