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c_cpp
a year ago
509 B
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#include <iostream>
#include <stdio.h>
#include <string>
#include <memory.h>
#include <set>
#include <map>
#include <vector>
#include <queue>
#include <time.h>
#include <assert.h>
#include <cmath>
#include <stack>
#include <string.h>
#include <sstream>
#include <algorithm>
using namespace std;
typedef long long ll;
int main()
{
	set<int> s;
	for(int i=0;i<6;++i){
	    int x;
	    cin>>x;
	    s.insert(x);
	}
	if(s.size()==4)
	    puts("4");
	else
	    puts("6");
	return 0;
}
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