Submission #18642

#	Time	Username	Problem	Language	Result	Execution time	Memory
18642		Namnamseo	경비원 (GA8_guard)	C++14	100 / 100	406 ms	1364 KiB

guard

#include <cstdio>
#include <algorithm>
#include <queue>
int ps[]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47};
int pn=15;
int n;
int data[2223];
typedef std::pair<int,int> pp;
pp dd[2223];
int dp   [1<<15];
int dptmp[1<<15];
int M=int(1e9)+7;
bool isprime(int x){
    for(int i=2;i*i<=x;++i) if(x%i==0) return 0;
    return 1;
}
int getMaxDivisor(int x){
    for(int i=x;i>=1;--i) if(x%i==0 && isprime(i)) return i;
    return '?';
}
int main()
{
    int i,j;
    scanf("%d",&n);
    for(i=0;i<n;++i){
        scanf("%d",data+i);
        dd[i]={getMaxDivisor(data[i]),data[i]};
    }
    std::sort(dd,dd+n);
    dp   [0]=1;
    dptmp[0]=1;
    for(i=0;i<n;++i){
        int mymask = 0;
        int myval  = dd[i].second;
        for(j=0; j<pn; ++j) if(myval % ps[j]==0) mymask |= (1<<j);
        for(j=0; j<32768; ++j){
            if((j&mymask) == mymask){
                dptmp[j]+=dp[j^mymask];
                dptmp[j]%=M;
            }
        }
        if(i+1==n || dd[i].first<=47 || dd[i].first != dd[i+1].first){
            for(j=0; j<32768; ++j) dp[j]=dptmp[j];
        }
    }
    int ans=0;
    for(i=0; i<32768; ++i) ans+=dp[i], ans%=M;
    printf("%d\n",(ans-n-1+M)%M);
    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 13 / 13
• Subtask 3: 16 / 16
• Subtask 4: 27 / 27
• Subtask 5: 36 / 36