题解 | 完全数计算

#include <stdio.h>

int main() {
    int n;
    int count = 0;
    while (scanf("%d", &n) != EOF) { 
          int i,j;
          for(i=1;i<=n;i++)
          {
            int sum = 0;
            for(j=1;j<i;j++)
            {
                if(i % j == 0) 
                sum += j;
            } 
            if(sum == i)
            count++;
          }
          printf("%d",count);
    }
    return 0;
}