题解 | #完全数计算#

#include<bits/stdc++.h>

using namespace std;

bool isAllNum(int num){
    int tmp = 0;
    for(int i = 1; i < num; i++){
        if(num % i == 0){
            tmp += i;
        }
    } 
    if(tmp == num){
        //cout << num<<"是完全数。"<<endl;
        return true;
        
    }
    return false;
}

int main(){
    int num = 0;
    while(cin>>num){
        int res = 0;
        for(int i = 1; i <= num; i++){
            if(isAllNum(i)) res++;   
        }        
        cout<<res<<endl;
    }
        
    return 0;
}