蓝桥杯历届试题-回文数字，包看懂解法

#include"bits/stdc++.h"
using namespace std;
int main() {
    int a,b=0,c,d,e,f,g,h;
    cin>>a;
    for(int i=10000;i<=999999;i++){
        if(i>=10000&&i<=99999){
                c=i%10;
                d=i/10%10;
                e=i/100%10;
                f=i/1000%10;
                g=i/10000%10;
                if(c==g&&d==f&&c+d+e+f+g==a){
                    cout<<i<<endl;
                    b++;
                }
        }
        else if(i>=100000){
            c=i%10;
            d=i/10%10;
            e=i/100%10;
            f=i/1000%10;
            g=i/10000%10;
            h=i/100000%10;
            if(c==h&&d==g&&e==f&&c+d+e+f+g+h==a){
                cout<<i<<endl;
                b++;
            }
        }
    }
    if(b==0){
        cout<<"-1"<<endl;
    }
    return 0;
}

解题思路:

注意事项:

参考代码: