## Thursday, March 10, 2011

### poj_1528_Perfection.cpp

poj1528, uva00382,

## Problem:

Perfection
 Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 7728 Accepted: 3713
Description
From the article Number Theory in the 1994 Microsoft Encarta: ``If a, b, c are integers such that a = bc, a is called a multiple of b or of c, and b or c is called a divisor or factor of a. If c is not 1/-1, b is called a proper divisor of a. Even integers, which include 0, are multiples of 2, for example, -4, 0, 2, 10; an odd integer is an integer that is not even, for example, -5, 1, 3, 9. A perfect number is a positive integer that is equal to the sum of all its positive, proper divisors; for example, 6, which equals 1 + 2 + 3, and 28, which equals 1 + 2 + 4 + 7 + 14, are perfect numbers. A positive number that is not perfect is imperfect and is deficient or abundant according to whether the sum of its positive, proper divisors is smaller or larger than the number itself. Thus, 9, with proper divisors 1, 3, is deficient; 12, with proper divisors 1, 2, 3, 4, 6, is abundant."
Given a number, determine if it is perfect, abundant, or deficient.
Input
A list of N positive integers (none greater than 60,000), with 1 <= N < 100. A 0 will mark the end of the list.
Output
The first line of output should read PERFECTION OUTPUT. The next N lines of output should list for each input integer whether it is perfect, deficient, or abundant, as shown in the example below. Format counts: the echoed integers should be right justified within the first 5 spaces of the output line, followed by two blank spaces, followed by the description of the integer. The final line of output should read END OF OUTPUT.
Sample Input
`15 28 6 56 60000 22 496 0`
Sample Output
```PERFECTION OUTPUT
15  DEFICIENT
28  PERFECT
6  PERFECT
56  ABUNDANT
60000  ABUNDANT
22  DEFICIENT
496  PERFECT
END OF OUTPUT```
Source
Mid-Atlantic 1996

## Solution:

Primer checker.
Take care when N is 1.

## Source Code:

//Thu Mar 10 16:48:31 CST 2011
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>

using namespace std;

string check(int N)
{
int sum = 0;
for (int i = 1; i <= (int) sqrt(1.0 * N); i++)
{
if (N % i == 0)
{
if (i != N)
sum += i;
int a = N / i;
if (a != N)
sum += a;
}
}
if (sum == N)
return "PERFECT";
if (sum < N)
return "DEFICIENT";
else return "ABUNDANT";
}

int main(int argc, const char* argv[])
{
//freopen("input.in", "r", stdin);
//freopen("output.out", "w", stdout);
cout << "PERFECTION OUTPUT" << endl;
int N;
while (cin >> N && N != 0)
{
cout << setw(5);
cout << N << "  " << check(N) << endl;
}
cout << "END OF OUTPUT" << endl;
//fclose(stdin);
//fclose(stdout);
return 0;
}