제출 #552065

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
552065		neki	비스킷 담기 (IOI20_biscuits)	C++14	0 / 100	138 ms	380 KiB

biscuits

#include <bits/stdc++.h>

using namespace std;

#define vc vector
#define ll __int128
#define loop(i, a, b) for(ll i=a;i<b;++i)
#define pool(i, a, b) for(ll i=a-1;i>=b;--i)
ll min(ll a, ll b){return (a>b) ? b:a;}
long long count_tastiness(long long X, vc<long long> A){
    ll x=X;
    ll k=A.size();
    ll mk=124;
    
    vc<ll> a(mk); loop(i, 0, k) a[i+1]=A[i];
    
    vc<ll> dp(mk, 0);dp[0]=1;
    loop(ti, 1, mk){
        dp[ti]=dp[ti-1];
        if(a[ti]>=x) dp[ti]+=dp[ti-1];
        else{
            ll i=ti;
            vc<ll> na=a;
            pool(j, ti, 1){
                ll rpot=((ll)1<<(i-j));
                ll kok=min((x-na[i]) * rpot, na[j]- na[j]%rpot);
                
                na[i]+=kok/rpot;
                na[j]-=kok;
                
                if(x>na[i]) na[j-1]+=2 * na[j];
                else{
                    if(na[j]>=x){dp[ti]+=dp[j];break;}
                    else{
                        dp[ti]+=dp[j-1];
                        i=j;
                    }
                }
            }
        }
    }
    return (long long ) dp[mk-1];
}

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