题意:一数列an,如果存在一个k,有2^(ai)+2^(aj)+......=2^k成立,那么一次能拿走ai,aj这些全部。问最少拿的次数。

太简单。

乱码

//#pragma comment(linker,"/STACK:1024000000,1024000000")
#include<iostream>
#include<cstdio>
#include<string>
#include<cstring>
#include<vector>
#include<cmath>
#include<queue>
#include<stack>
#include<map>
#include<set>
#include<algorithm>
#include <stack>
#include <ctime>
#include <iomanip>
using namespace std;
const int SZ=,INF=0x7FFFFFFF;
typedef long long lon;
lon num[SZ]; int main()
{
std::ios::sync_with_stdio();
//freopen("d:\\1.txt","r",stdin);
int n;
//for(;cin>>n,n;)
{
cin>>n;
for(int i=;i<n;++i)
{
int tmp;
cin>>tmp;
++num[tmp];
}
for(int i=;i<SZ;++i)
{
num[i+]+=num[i]/;
num[i]=(num[i]&);
}
// for(int i=0;i<SZ;++i)
// {
// if(num[i])cout<<i<<" ";
// }cout<<endl;
int res=count(num,num+SZ,);
cout<<res<<endl;
}
return ;
}

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