View Code of Problem 93

#include <stdio.h>
int main(){
	int f(int n);
	int m,n;
	scanf("%d %d",&m,&n);
	int i,j;
	for(i=m;i<=n;i++){
		if(f(f(i))==i&&f(i)>i) printf("%d %d\n",i,f(i));
	}
	return 0;
}
int f(int n){
	int i,all=0;
	for(i=1;i<n;i++){
		if(n%i==0) all+=i;
	}
	return all;
}