codeforces Gym 101063 C

二进制转十进制 然后按位比较

传送门 http://codeforces.com/gym/101063

#include <cstdio>
#include <cmath>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <string>
#include <queue>
#include <vector>
using namespace std;
const int maxn= ;
const double eps= 1e-;
const int inf = 0x3f3f3f3f;
const int mod =;
typedef long long ll;
typedef long double ld;
int n,m;
int a[maxn][];
int b[maxn];
ll c[maxn];
ll d[maxn];
int main()
{
    while(scanf("%d %d",&n,&m)!=EOF)
    {
        memset(b,,sizeof(b));
        memset(c,,sizeof(c));
        for(int i=;i<=n;i++)
        {
            int t;
            scanf("%d",&t);
            for(int j=;j<=t;j++)
            {
                scanf("%d",&a[i][j]);
                b[i]+=(<<(a[i][j]-));
            }
            c[b[i]]++;
        }
        for(int i=;i<=;i++)
        {
            int k=i;
            d[i]=;
            while(k>)
            {
                if(k%)
                    d[i]++;        //i转换成二进制有多少个1
                k/=;
            }
            //printf("%d %d\n",i,d[i]);
        }
        ll ans=;
        ld r;
        cin>>r;
        for(int i=;i<=;i++)
        {
            for(int j=i;j<=;j++)
            {
                int q=i&j,p=i|j;
                ld k=(ld)d[q]/(ld)d[p];
                if(k>=r)
                {
                    if(i!=j)
                        ans+=c[i]*c[j];
                    else
                        ans+=c[i]*(c[i]-)/;
                }
            }
        }
        printf("%I64d\n",ans);
    }
}