View Code of Problem 93

#include<stdio.h>
#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>
#include<cmath>
#include<stack>
#include<map>
#include<vector>
#include<cstdbool>
using namespace std;
int fan(int a) {
	int sum = 1;
	for (int i = 2; i < a; i++) {
		if (a % i == 0) {
			sum = sum + i;
		}
	}
	return sum;
}

int main()
{
	int n, nb;
	cin >> n >> nb;
	for (int i = n; i <= nb; i++) {
		int nice = fan(i);
		int ppp = fan(nice);
		if (i == ppp && i < nice) {
			cout << i << " " << nice << endl;
		}
	}
	
	return 0;
}