题解 | #完全数计算#
完全数计算
https://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84?tpId=37&tqId=21279&rp=1&ru=/exam/oj/ta&qru=/exam/oj/ta&sourceUrl=%2Fexam%2Foj%2Fta%3Fpage%3D1%26pageSize%3D50%26search%3D%26tpId%3D37%26type%3D37&difficulty=undefined&judgeStatus=undefined&tags=&title=
#include <iostream>
#include <cmath>
using namespace std;
int main() {
int a;
int count = 0;
cin >> a;
for (int i = 1; i <= a; i++) { //遍历小于n的所有数
int sum = 0;
for (int j = 1; j < i; j++) { //求公约数
if (i % j == 0) {
sum =sum + j;
}
}
if (sum == i) {
count ++;
}
}
cout << count << endl;
}
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