Submission #75826

#	Time	Username	Problem	Language	Result	Execution time	Memory
75826		charlies_moo	Savrsen (COCI17_savrsen)	C++98	30 / 120	3062 ms	612 KiB

savrsen

#include <cstdio>
#include <cmath>
#include <iostream>

using namespace std;

int is_perfect(long long n)
{
    int sum=0;
    for(int i=1;i<=sqrt(n);i++)
    {
        if(n%i==0)
        {
        	if(i<n)
            	sum+=i;
            if((n/i)<n)
				sum+=n/i;
        }
    }
    sum-=n;
    int sqn=sqrt(n);
    if(sqn*sqn==n && sqn<n)
		sum-=sqn;
    return abs(sum);
}

int main()
{
	int a,b,ans=0;
    cin>>a>>b;
    for(int i=a;i<=b;i++)
    	ans+=is_perfect(i);
    cout<<ans;
    return 0;
}

• Subtask 1: 30 / 120