31 lines
480 B
C++
31 lines
480 B
C++
#include <iostream>
|
|
#include <cmath>
|
|
|
|
class Solution {
|
|
public:
|
|
static bool checkPerfectNumber(int num) {
|
|
switch (num) {
|
|
case 6:
|
|
case 28:
|
|
case 496:
|
|
case 8128:
|
|
case 33550336:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
};
|
|
|
|
int main() {
|
|
for (int i = 1; i < 100000000; ++i) {
|
|
int s = 1;
|
|
int lim = int(std::sqrt(i + 0.50));
|
|
for (int j = 2; j <= lim; ++j)
|
|
if (i % j == 0)
|
|
s += j + i / j;
|
|
if (s == i)
|
|
std::printf("%d\n", i);
|
|
}
|
|
return 0;
|
|
} |