Submission #19724555

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
bool to_8(int k)
{
	while(k)
	{
		if(k%8==7)
		{
			return true;
		}
    k/=8;
  }
  return false;
}

bool to_10(int k)
{
	while(k)
	{
		if(k%10==7)
		{
			return true;
		}
		k/=10;
	}
    return false;
}

int main()
{
	int n,i,ans=0;
	cin>>n;
	for(i=1;i<=n;i++)
	{
		if(to_8(i)||to_10(i))
		{
			ans++;
		}
	}
	cout<<n-ans;
	return 0; 
}

Submission Info

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